{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2023-52610", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-03-06T09:52:12.088Z", "datePublished": "2024-03-18T10:07:46.065Z", "dateUpdated": "2026-08-05T09:10:41.134Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T09:10:41.134Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: act_ct: fix skb leak and crash on ooo frags\n\nact_ct adds skb->users before defragmentation. If frags arrive in order,\nthe last frag's reference is reset in:\n\n inet_frag_reasm_prepare\n skb_morph\n\nwhich is not straightforward.\n\nHowever when frags arrive out of order, nobody unref the last frag, and\nall frags are leaked. The situation is even worse, as initiating packet\ncapture can lead to a crash[0] when skb has been cloned and shared at the\nsame time.\n\nFix the issue by removing skb_get() before defragmentation. act_ct\nreturns TC_ACT_CONSUMED when defrag failed or in progress.\n\n[0]:\n[ 843.804823] ------------[ cut here ]------------\n[ 843.809659] kernel BUG at net/core/skbuff.c:2091!\n[ 843.814516] invalid opcode: 0000 [#1] PREEMPT SMP\n[ 843.819296] CPU: 7 PID: 0 Comm: swapper/7 Kdump: loaded Tainted: G S 6.7.0-rc3 #2\n[ 843.824107] Hardware name: XFUSION 1288H V6/BC13MBSBD, BIOS 1.29 11/25/2022\n[ 843.828953] RIP: 0010:pskb_expand_head+0x2ac/0x300\n[ 843.833805] Code: 8b 70 28 48 85 f6 74 82 48 83 c6 08 bf 01 00 00 00 e8 38 bd ff ff 8b 83 c0 00 00 00 48 03 83 c8 00 00 00 e9 62 ff ff ff 0f 0b <0f> 0b e8 8d d0 ff ff e9 b3 fd ff ff 81 7c 24 14 40 01 00 00 4c 89\n[ 843.843698] RSP: 0018:ffffc9000cce07c0 EFLAGS: 00010202\n[ 843.848524] RAX: 0000000000000002 RBX: ffff88811a211d00 RCX: 0000000000000820\n[ 843.853299] RDX: 0000000000000640 RSI: 0000000000000000 RDI: ffff88811a211d00\n[ 843.857974] RBP: ffff888127d39518 R08: 00000000bee97314 R09: 0000000000000000\n[ 843.862584] R10: 0000000000000000 R11: ffff8881109f0000 R12: 0000000000000880\n[ 843.867147] R13: ffff888127d39580 R14: 0000000000000640 R15: ffff888170f7b900\n[ 843.871680] FS: 0000000000000000(0000) GS:ffff889ffffc0000(0000) knlGS:0000000000000000\n[ 843.876242] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 843.880778] CR2: 00007fa42affcfb8 CR3: 000000011433a002 CR4: 0000000000770ef0\n[ 843.885336] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[ 843.889809] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n[ 843.894229] PKRU: 55555554\n[ 843.898539] Call Trace:\n[ 843.902772] <IRQ>\n[ 843.906922] ? __die_body+0x1e/0x60\n[ 843.911032] ? die+0x3c/0x60\n[ 843.915037] ? do_trap+0xe2/0x110\n[ 843.918911] ? pskb_expand_head+0x2ac/0x300\n[ 843.922687] ? do_error_trap+0x65/0x80\n[ 843.926342] ? pskb_expand_head+0x2ac/0x300\n[ 843.929905] ? exc_invalid_op+0x50/0x60\n[ 843.933398] ? pskb_expand_head+0x2ac/0x300\n[ 843.936835] ? asm_exc_invalid_op+0x1a/0x20\n[ 843.940226] ? pskb_expand_head+0x2ac/0x300\n[ 843.943580] inet_frag_reasm_prepare+0xd1/0x240\n[ 843.946904] ip_defrag+0x5d4/0x870\n[ 843.950132] nf_ct_handle_fragments+0xec/0x130 [nf_conntrack]\n[ 843.953334] tcf_ct_act+0x252/0xd90 [act_ct]\n[ 843.956473] ? tcf_mirred_act+0x516/0x5a0 [act_mirred]\n[ 843.959657] tcf_action_exec+0xa1/0x160\n[ 843.962823] fl_classify+0x1db/0x1f0 [cls_flower]\n[ 843.966010] ? skb_clone+0x53/0xc0\n[ 843.969173] tcf_classify+0x24d/0x420\n[ 843.972333] tc_run+0x8f/0xf0\n[ 843.975465] __netif_receive_skb_core+0x67a/0x1080\n[ 843.978634] ? dev_gro_receive+0x249/0x730\n[ 843.981759] __netif_receive_skb_list_core+0x12d/0x260\n[ 843.984869] netif_receive_skb_list_internal+0x1cb/0x2f0\n[ 843.987957] ? mlx5e_handle_rx_cqe_mpwrq_rep+0xfa/0x1a0 [mlx5_core]\n[ 843.991170] napi_complete_done+0x72/0x1a0\n[ 843.994305] mlx5e_napi_poll+0x28c/0x6d0 [mlx5_core]\n[ 843.997501] __napi_poll+0x25/0x1b0\n[ 844.000627] net_rx_action+0x256/0x330\n[ 844.003705] __do_softirq+0xb3/0x29b\n[ 844.006718] irq_exit_rcu+0x9e/0xc0\n[ 844.009672] common_interrupt+0x86/0xa0\n[ 844.012537] </IRQ>\n[ 844.015285] <TASK>\n[ 844.017937] asm_common_interrupt+0x26/0x40\n[ 844.020591] RIP: 0010:acpi_safe_halt+0x1b/0x20\n[ 844.023247] Code: ff 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 65 48 8b 04 25 00 18 03 00 48 8b 00 a8 08 75 0c 66 90 0f 00 2d 81 d0 44 00 fb\n---truncated---"}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:N - The vulnerable tcf_ct_act path runs on ingress clsact/flower during packet receive (__netif_receive_skb_core \u2192 tc_run \u2192 fl_classify), and in common OVN/OVS/cloud deployments with act_ct already installed a remote peer can trigger it by sending IP fragments that hit those rules.\nAC:L - The attacker fully controls out-of-order fragment delivery, which reliably causes the skb reference leak; the BUG_ON crash occurs when the skb is also cloned, which is attacker-achievable (local pcap) or inherent in typical act_ct+mirred pipelines.\nPR:N - Once act_ct is present on an ingress path (reasonable vulnerable configuration), triggering requires only sending crafted fragmented packets with no authentication or privileges; configuring act_ct itself is not required of the remote attacker.\nUI:N - Exploitation requires no victim user action; sending OOO fragments to a host with act_ct is sufficient.\nS:U - Impact is confined to the local kernel (crash/memory leak); this is a standard host DoS, not a VM escape or cross-boundary scope change.\nC:N - The bug is an skb refcount leak leading to an intentional BUG_ON(skb_shared) in pskb_expand_head, not a use-after-free or out-of-bounds read that discloses memory.\nI:N - Extra references cause leaks and a hard BUG_ON abort rather than a controllable write or corruption primitive that could hijack control flow.\nA:H - Reassembly with a shared+cloned skb hits kernel BUG at pskb_expand_head (confirmed oops in the fix), and OOO fragments also permanently leak skbs that can be repeated for resource exhaustion."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/sched/act_ct.c"], "versions": [{"version": "b57dc7c13ea90e09ae15f821d2583fa0231b4935", "lessThan": "172ba7d46c202e679f3ccb10264c67416aaeb1c4", "status": "affected", "versionType": "git"}, {"version": "b57dc7c13ea90e09ae15f821d2583fa0231b4935", "lessThan": "0b5b831122fc3789fff75be433ba3e4dd7b779d4", "status": "affected", "versionType": "git"}, {"version": "b57dc7c13ea90e09ae15f821d2583fa0231b4935", "lessThan": "73f7da5fd124f2cda9161e2e46114915e6e82e97", "status": "affected", "versionType": "git"}, {"version": "b57dc7c13ea90e09ae15f821d2583fa0231b4935", "lessThan": "f5346df0591d10bc948761ca854b1fae6d2ef441", "status": "affected", "versionType": "git"}, {"version": "b57dc7c13ea90e09ae15f821d2583fa0231b4935", "lessThan": "3f14b377d01d8357eba032b4cabc8c1149b458b6", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/sched/act_ct.c"], "versions": [{"version": "5.3", "status": "affected"}, {"version": "0", "lessThan": "5.3", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.148", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.75", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.14", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.7.2", "lessThanOrEqual": "6.7.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.8", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "5.15.148"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "6.1.75"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "6.6.14"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "6.7.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "6.8"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/172ba7d46c202e679f3ccb10264c67416aaeb1c4"}, {"url": "https://git.kernel.org/stable/c/0b5b831122fc3789fff75be433ba3e4dd7b779d4"}, {"url": "https://git.kernel.org/stable/c/73f7da5fd124f2cda9161e2e46114915e6e82e97"}, {"url": "https://git.kernel.org/stable/c/f5346df0591d10bc948761ca854b1fae6d2ef441"}, {"url": "https://git.kernel.org/stable/c/3f14b377d01d8357eba032b4cabc8c1149b458b6"}], "title": "net/sched: act_ct: fix skb leak and crash on ooo frags", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2024-06-21T16:09:12.830591Z", "id": "CVE-2023-52610", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-21T16:09:22.568Z"}}, {"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T23:03:21.154Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/172ba7d46c202e679f3ccb10264c67416aaeb1c4", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/0b5b831122fc3789fff75be433ba3e4dd7b779d4", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/73f7da5fd124f2cda9161e2e46114915e6e82e97", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/f5346df0591d10bc948761ca854b1fae6d2ef441", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/3f14b377d01d8357eba032b4cabc8c1149b458b6", "tags": ["x_transferred"]}]}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/172ba7d46c202e679f3ccb10264c67416aaeb1c4", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/0b5b831122fc3789fff75be433ba3e4dd7b779d4", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/73f7da5fd124f2cda9161e2e46114915e6e82e97", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/f5346df0591d10bc948761ca854b1fae6d2ef441", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/3f14b377d01d8357eba032b4cabc8c1149b458b6", "tags": ["x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T23:03:21.154Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2023-52610", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-06-21T16:09:12.830591Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-21T16:09:17.583Z"}}], "cna": {"title": "net/sched: act_ct: fix skb leak and crash on ooo frags", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 7.5, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}, "scenarios": [{"lang": "en", "value": "AV:N - The vulnerable tcf_ct_act path runs on ingress clsact/flower during packet receive (__netif_receive_skb_core \u2192 tc_run \u2192 fl_classify), and in common OVN/OVS/cloud deployments with act_ct already installed a remote peer can trigger it by sending IP fragments that hit those rules.\nAC:L - The attacker fully controls out-of-order fragment delivery, which reliably causes the skb reference leak; the BUG_ON crash occurs when the skb is also cloned, which is attacker-achievable (local pcap) or inherent in typical act_ct+mirred pipelines.\nPR:N - Once act_ct is present on an ingress path (reasonable vulnerable configuration), triggering requires only sending crafted fragmented packets with no authentication or privileges; configuring act_ct itself is not required of the remote attacker.\nUI:N - Exploitation requires no victim user action; sending OOO fragments to a host with act_ct is sufficient.\nS:U - Impact is confined to the local kernel (crash/memory leak); this is a standard host DoS, not a VM escape or cross-boundary scope change.\nC:N - The bug is an skb refcount leak leading to an intentional BUG_ON(skb_shared) in pskb_expand_head, not a use-after-free or out-of-bounds read that discloses memory.\nI:N - Extra references cause leaks and a hard BUG_ON abort rather than a controllable write or corruption primitive that could hijack control flow.\nA:H - Reassembly with a shared+cloned skb hits kernel BUG at pskb_expand_head (confirmed oops in the fix), and OOO fragments also permanently leak skbs that can be repeated for resource exhaustion."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "b57dc7c13ea90e09ae15f821d2583fa0231b4935", "lessThan": "172ba7d46c202e679f3ccb10264c67416aaeb1c4", "versionType": "git"}, {"status": "affected", "version": "b57dc7c13ea90e09ae15f821d2583fa0231b4935", "lessThan": "0b5b831122fc3789fff75be433ba3e4dd7b779d4", "versionType": "git"}, {"status": "affected", "version": "b57dc7c13ea90e09ae15f821d2583fa0231b4935", "lessThan": "73f7da5fd124f2cda9161e2e46114915e6e82e97", "versionType": "git"}, {"status": "affected", "version": "b57dc7c13ea90e09ae15f821d2583fa0231b4935", "lessThan": "f5346df0591d10bc948761ca854b1fae6d2ef441", "versionType": "git"}, {"status": "affected", "version": "b57dc7c13ea90e09ae15f821d2583fa0231b4935", "lessThan": "3f14b377d01d8357eba032b4cabc8c1149b458b6", "versionType": "git"}], "programFiles": ["net/sched/act_ct.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.3"}, {"status": "unaffected", "version": "0", "lessThan": "5.3", "versionType": "semver"}, {"status": "unaffected", "version": "5.15.148", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.75", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.14", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.7.2", "versionType": "semver", "lessThanOrEqual": "6.7.*"}, {"status": "unaffected", "version": "6.8", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/sched/act_ct.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/172ba7d46c202e679f3ccb10264c67416aaeb1c4"}, {"url": "https://git.kernel.org/stable/c/0b5b831122fc3789fff75be433ba3e4dd7b779d4"}, {"url": "https://git.kernel.org/stable/c/73f7da5fd124f2cda9161e2e46114915e6e82e97"}, {"url": "https://git.kernel.org/stable/c/f5346df0591d10bc948761ca854b1fae6d2ef441"}, {"url": "https://git.kernel.org/stable/c/3f14b377d01d8357eba032b4cabc8c1149b458b6"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: act_ct: fix skb leak and crash on ooo frags\n\nact_ct adds skb->users before defragmentation. If frags arrive in order,\nthe last frag's reference is reset in:\n\n inet_frag_reasm_prepare\n skb_morph\n\nwhich is not straightforward.\n\nHowever when frags arrive out of order, nobody unref the last frag, and\nall frags are leaked. The situation is even worse, as initiating packet\ncapture can lead to a crash[0] when skb has been cloned and shared at the\nsame time.\n\nFix the issue by removing skb_get() before defragmentation. act_ct\nreturns TC_ACT_CONSUMED when defrag failed or in progress.\n\n[0]:\n[ 843.804823] ------------[ cut here ]------------\n[ 843.809659] kernel BUG at net/core/skbuff.c:2091!\n[ 843.814516] invalid opcode: 0000 [#1] PREEMPT SMP\n[ 843.819296] CPU: 7 PID: 0 Comm: swapper/7 Kdump: loaded Tainted: G S 6.7.0-rc3 #2\n[ 843.824107] Hardware name: XFUSION 1288H V6/BC13MBSBD, BIOS 1.29 11/25/2022\n[ 843.828953] RIP: 0010:pskb_expand_head+0x2ac/0x300\n[ 843.833805] Code: 8b 70 28 48 85 f6 74 82 48 83 c6 08 bf 01 00 00 00 e8 38 bd ff ff 8b 83 c0 00 00 00 48 03 83 c8 00 00 00 e9 62 ff ff ff 0f 0b <0f> 0b e8 8d d0 ff ff e9 b3 fd ff ff 81 7c 24 14 40 01 00 00 4c 89\n[ 843.843698] RSP: 0018:ffffc9000cce07c0 EFLAGS: 00010202\n[ 843.848524] RAX: 0000000000000002 RBX: ffff88811a211d00 RCX: 0000000000000820\n[ 843.853299] RDX: 0000000000000640 RSI: 0000000000000000 RDI: ffff88811a211d00\n[ 843.857974] RBP: ffff888127d39518 R08: 00000000bee97314 R09: 0000000000000000\n[ 843.862584] R10: 0000000000000000 R11: ffff8881109f0000 R12: 0000000000000880\n[ 843.867147] R13: ffff888127d39580 R14: 0000000000000640 R15: ffff888170f7b900\n[ 843.871680] FS: 0000000000000000(0000) GS:ffff889ffffc0000(0000) knlGS:0000000000000000\n[ 843.876242] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 843.880778] CR2: 00007fa42affcfb8 CR3: 000000011433a002 CR4: 0000000000770ef0\n[ 843.885336] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[ 843.889809] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n[ 843.894229] PKRU: 55555554\n[ 843.898539] Call Trace:\n[ 843.902772] <IRQ>\n[ 843.906922] ? __die_body+0x1e/0x60\n[ 843.911032] ? die+0x3c/0x60\n[ 843.915037] ? do_trap+0xe2/0x110\n[ 843.918911] ? pskb_expand_head+0x2ac/0x300\n[ 843.922687] ? do_error_trap+0x65/0x80\n[ 843.926342] ? pskb_expand_head+0x2ac/0x300\n[ 843.929905] ? exc_invalid_op+0x50/0x60\n[ 843.933398] ? pskb_expand_head+0x2ac/0x300\n[ 843.936835] ? asm_exc_invalid_op+0x1a/0x20\n[ 843.940226] ? pskb_expand_head+0x2ac/0x300\n[ 843.943580] inet_frag_reasm_prepare+0xd1/0x240\n[ 843.946904] ip_defrag+0x5d4/0x870\n[ 843.950132] nf_ct_handle_fragments+0xec/0x130 [nf_conntrack]\n[ 843.953334] tcf_ct_act+0x252/0xd90 [act_ct]\n[ 843.956473] ? tcf_mirred_act+0x516/0x5a0 [act_mirred]\n[ 843.959657] tcf_action_exec+0xa1/0x160\n[ 843.962823] fl_classify+0x1db/0x1f0 [cls_flower]\n[ 843.966010] ? skb_clone+0x53/0xc0\n[ 843.969173] tcf_classify+0x24d/0x420\n[ 843.972333] tc_run+0x8f/0xf0\n[ 843.975465] __netif_receive_skb_core+0x67a/0x1080\n[ 843.978634] ? dev_gro_receive+0x249/0x730\n[ 843.981759] __netif_receive_skb_list_core+0x12d/0x260\n[ 843.984869] netif_receive_skb_list_internal+0x1cb/0x2f0\n[ 843.987957] ? mlx5e_handle_rx_cqe_mpwrq_rep+0xfa/0x1a0 [mlx5_core]\n[ 843.991170] napi_complete_done+0x72/0x1a0\n[ 843.994305] mlx5e_napi_poll+0x28c/0x6d0 [mlx5_core]\n[ 843.997501] __napi_poll+0x25/0x1b0\n[ 844.000627] net_rx_action+0x256/0x330\n[ 844.003705] __do_softirq+0xb3/0x29b\n[ 844.006718] irq_exit_rcu+0x9e/0xc0\n[ 844.009672] common_interrupt+0x86/0xa0\n[ 844.012537] </IRQ>\n[ 844.015285] <TASK>\n[ 844.017937] asm_common_interrupt+0x26/0x40\n[ 844.020591] RIP: 0010:acpi_safe_halt+0x1b/0x20\n[ 844.023247] Code: ff 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 65 48 8b 04 25 00 18 03 00 48 8b 00 a8 08 75 0c 66 90 0f 00 2d 81 d0 44 00 fb\n---truncated---"}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.148", "versionStartIncluding": "5.3"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.75", "versionStartIncluding": "5.3"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.14", "versionStartIncluding": "5.3"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.7.2", "versionStartIncluding": "5.3"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.8", "versionStartIncluding": "5.3"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T09:10:41.134Z"}}}, "cveMetadata": {"cveId": "CVE-2023-52610", "state": "PUBLISHED", "dateUpdated": "2026-08-05T09:10:41.134Z", "dateReserved": "2024-03-06T09:52:12.088Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-03-18T10:07:46.065Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/sched/act_ct.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "172ba7d46c202e679f3ccb10264c67416aaeb1c4", "status": "affected", "version": "b57dc7c13ea90e09ae15f821d2583fa0231b4935", "versionType": "git"}, {"lessThan": "0b5b831122fc3789fff75be433ba3e4dd7b779d4", "status": "affected", "version": "b57dc7c13ea90e09ae15f821d2583fa0231b4935", "versionType": "git"}, {"lessThan": "73f7da5fd124f2cda9161e2e46114915e6e82e97", "status": "affected", "version": "b57dc7c13ea90e09ae15f821d2583fa0231b4935", "versionType": "git"}, {"lessThan": "f5346df0591d10bc948761ca854b1fae6d2ef441", "status": "affected", "version": "b57dc7c13ea90e09ae15f821d2583fa0231b4935", "versionType": "git"}, {"lessThan": "3f14b377d01d8357eba032b4cabc8c1149b458b6", "status": "affected", "version": "b57dc7c13ea90e09ae15f821d2583fa0231b4935", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/sched/act_ct.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.3"}, {"lessThan": "5.3", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.148", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.75", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.14", "versionType": "semver"}, {"lessThanOrEqual": "6.7.*", "status": "unaffected", "version": "6.7.2", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.8", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "8F81F20B-C3A0-4AD7-B13E-118B3FDB8019", "versionEndExcluding": "5.15.148", "versionStartIncluding": "5.3", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "070D0ED3-90D0-4F95-B1FF-57D7F46F332D", "versionEndExcluding": "6.1.75", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "5C6B50A6-3D8B-4CE2-BDCC-A098609CBA14", "versionEndExcluding": "6.6.14", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "7229C448-E0C9-488B-8939-36BA5254065E", "versionEndExcluding": "6.7.2", "versionStartIncluding": "6.7", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: act_ct: fix skb leak and crash on ooo frags\n\nact_ct adds skb->users before defragmentation. If frags arrive in order,\nthe last frag's reference is reset in:\n\n inet_frag_reasm_prepare\n skb_morph\n\nwhich is not straightforward.\n\nHowever when frags arrive out of order, nobody unref the last frag, and\nall frags are leaked. The situation is even worse, as initiating packet\ncapture can lead to a crash[0] when skb has been cloned and shared at the\nsame time.\n\nFix the issue by removing skb_get() before defragmentation. act_ct\nreturns TC_ACT_CONSUMED when defrag failed or in progress.\n\n[0]:\n[ 843.804823] ------------[ cut here ]------------\n[ 843.809659] kernel BUG at net/core/skbuff.c:2091!\n[ 843.814516] invalid opcode: 0000 [#1] PREEMPT SMP\n[ 843.819296] CPU: 7 PID: 0 Comm: swapper/7 Kdump: loaded Tainted: G S 6.7.0-rc3 #2\n[ 843.824107] Hardware name: XFUSION 1288H V6/BC13MBSBD, BIOS 1.29 11/25/2022\n[ 843.828953] RIP: 0010:pskb_expand_head+0x2ac/0x300\n[ 843.833805] Code: 8b 70 28 48 85 f6 74 82 48 83 c6 08 bf 01 00 00 00 e8 38 bd ff ff 8b 83 c0 00 00 00 48 03 83 c8 00 00 00 e9 62 ff ff ff 0f 0b <0f> 0b e8 8d d0 ff ff e9 b3 fd ff ff 81 7c 24 14 40 01 00 00 4c 89\n[ 843.843698] RSP: 0018:ffffc9000cce07c0 EFLAGS: 00010202\n[ 843.848524] RAX: 0000000000000002 RBX: ffff88811a211d00 RCX: 0000000000000820\n[ 843.853299] RDX: 0000000000000640 RSI: 0000000000000000 RDI: ffff88811a211d00\n[ 843.857974] RBP: ffff888127d39518 R08: 00000000bee97314 R09: 0000000000000000\n[ 843.862584] R10: 0000000000000000 R11: ffff8881109f0000 R12: 0000000000000880\n[ 843.867147] R13: ffff888127d39580 R14: 0000000000000640 R15: ffff888170f7b900\n[ 843.871680] FS: 0000000000000000(0000) GS:ffff889ffffc0000(0000) knlGS:0000000000000000\n[ 843.876242] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 843.880778] CR2: 00007fa42affcfb8 CR3: 000000011433a002 CR4: 0000000000770ef0\n[ 843.885336] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[ 843.889809] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n[ 843.894229] PKRU: 55555554\n[ 843.898539] Call Trace:\n[ 843.902772] <IRQ>\n[ 843.906922] ? __die_body+0x1e/0x60\n[ 843.911032] ? die+0x3c/0x60\n[ 843.915037] ? do_trap+0xe2/0x110\n[ 843.918911] ? pskb_expand_head+0x2ac/0x300\n[ 843.922687] ? do_error_trap+0x65/0x80\n[ 843.926342] ? pskb_expand_head+0x2ac/0x300\n[ 843.929905] ? exc_invalid_op+0x50/0x60\n[ 843.933398] ? pskb_expand_head+0x2ac/0x300\n[ 843.936835] ? asm_exc_invalid_op+0x1a/0x20\n[ 843.940226] ? pskb_expand_head+0x2ac/0x300\n[ 843.943580] inet_frag_reasm_prepare+0xd1/0x240\n[ 843.946904] ip_defrag+0x5d4/0x870\n[ 843.950132] nf_ct_handle_fragments+0xec/0x130 [nf_conntrack]\n[ 843.953334] tcf_ct_act+0x252/0xd90 [act_ct]\n[ 843.956473] ? tcf_mirred_act+0x516/0x5a0 [act_mirred]\n[ 843.959657] tcf_action_exec+0xa1/0x160\n[ 843.962823] fl_classify+0x1db/0x1f0 [cls_flower]\n[ 843.966010] ? skb_clone+0x53/0xc0\n[ 843.969173] tcf_classify+0x24d/0x420\n[ 843.972333] tc_run+0x8f/0xf0\n[ 843.975465] __netif_receive_skb_core+0x67a/0x1080\n[ 843.978634] ? dev_gro_receive+0x249/0x730\n[ 843.981759] __netif_receive_skb_list_core+0x12d/0x260\n[ 843.984869] netif_receive_skb_list_internal+0x1cb/0x2f0\n[ 843.987957] ? mlx5e_handle_rx_cqe_mpwrq_rep+0xfa/0x1a0 [mlx5_core]\n[ 843.991170] napi_complete_done+0x72/0x1a0\n[ 843.994305] mlx5e_napi_poll+0x28c/0x6d0 [mlx5_core]\n[ 843.997501] __napi_poll+0x25/0x1b0\n[ 844.000627] net_rx_action+0x256/0x330\n[ 844.003705] __do_softirq+0xb3/0x29b\n[ 844.006718] irq_exit_rcu+0x9e/0xc0\n[ 844.009672] common_interrupt+0x86/0xa0\n[ 844.012537] </IRQ>\n[ 844.015285] <TASK>\n[ 844.017937] asm_common_interrupt+0x26/0x40\n[ 844.020591] RIP: 0010:acpi_safe_halt+0x1b/0x20\n[ 844.023247] Code: ff 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 65 48 8b 04 25 00 18 03 00 48 8b 00 a8 08 75 0c 66 90 0f 00 2d 81 d0 44 00 fb\n---truncated---"}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: net/sched: act_ct: corrige la fuga de skb y falla en ooo frags act_ct agrega usuarios de skb-&gt; antes de la desfragmentaci\u00f3n. Si los fragmentos llegan en orden, la referencia del \u00faltimo fragmento se restablece en: inet_frag_reasm_prepare skb_morph, lo cual no es sencillo. Sin embargo, cuando los fragmentos llegan desordenados, nadie elimina la referencia del \u00faltimo fragmento y todos los fragmentos se filtran. La situaci\u00f3n es a\u00fan peor, ya que iniciar la captura de paquetes puede provocar una falla[0] cuando skb ha sido clonado y compartido al mismo tiempo. Solucione el problema eliminando skb_get() antes de la desfragmentaci\u00f3n. act_ct devuelve TC_ACT_CONSUMED cuando la desfragmentaci\u00f3n falla o est\u00e1 en progreso. [0]: [843.804823] ------------[ cortar aqu\u00ed ]------------ [ 843.809659] ERROR del kernel en net/core/skbuff.c:2091 ! [843.814516] c\u00f3digo de operaci\u00f3n no v\u00e1lido: 0000 [#1] PREEMPT SMP [ 843.819296] CPU: 7 PID: 0 Comm: swapper/7 Kdump: cargado Contaminado: GS 6.7.0-rc3 #2 [ 843.824107] Nombre de hardware: XFUSION 1288H V6/ BC13MBSBD, BIOS 1.29 25/11/2022 [ 843.828953] RIP: 0010:pskb_expand_head+0x2ac/0x300 [ 843.833805] C\u00f3digo: 8b 70 28 48 85 f6 74 82 48 83 c6 08 bf 01 00 0 0 00 e8 38 bd ff ff 8b 83 c0 00 00 00 48 03 83 c8 00 00 00 e9 62 ff ff ff 0f 0b &lt;0f&gt; 0b e8 8d d0 ff ff e9 b3 fd ff ff 81 7c 24 14 40 01 00 00 4c 89 [ 843.843698] RSP: 0 018:ffffc9000cce07c0 EFLAGS: 00010202 [843.848524] RAX: 00000000000000002 RBX: ffff88811a211d00 RCX: 00000000000000820 [843.853299] RDX: 0000000000000640 RSI: 0000000000000000 RDI: ffff88811a211d00 [ 843.857974] RBP: ffff888127d39518 R08: 00000000bee97314 R09: 00000000000000000 [ 843.862584] R10: 00 00000000000000 R11: ffff8881109f0000 R12: 0000000000000880 [ 843.867147] R13: ffff888127d39580 R14: 0000000000000640 R15: ffff888170f7b900 [ 843.871680] FS: 0000000000000000(0 000) GS:ffff889ffffc0000(0000) knlGS:00000000000000000 [ 843.876242] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 843.880778] CR2 : 00007fa42affcfb8 CR3: 000000011433a002 CR4: 0000000000770ef0 [ 843.885336] DR0: 00000000000000000 DR1: 00000000000000000 DR2: 000000000000000 00 [ 843.889809] DR3: 00000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 843.894229] PKRU: 55555554 [ 843.898539] Rastreo de llamadas: [ 843.90277 2] [843.906922] ? __die_body+0x1e/0x60 [ 843.911032] ? morir+0x3c/0x60 [843.915037]? do_trap+0xe2/0x110 [843.918911]? pskb_expand_head+0x2ac/0x300 [843.922687]? do_error_trap+0x65/0x80 [843.926342]? pskb_expand_head+0x2ac/0x300 [843.929905]? exc_invalid_op+0x50/0x60 [843.933398]? pskb_expand_head+0x2ac/0x300 [843.936835]? asm_exc_invalid_op+0x1a/0x20 [843.940226]? pskb_expand_head+0x2ac/0x300 [ 843.943580] inet_frag_reasm_prepare+0xd1/0x240 [ 843.946904] ip_defrag+0x5d4/0x870 [ 843.950132] nf_ct_handle_fragments+0xec/0x130 [nf_conn pista] [843.953334] tcf_ct_act+0x252/0xd90 [act_ct] [843.956473]? tcf_mirred_act+0x516/0x5a0 [act_mirred] [843.959657] tcf_action_exec+0xa1/0x160 [843.962823] fl_classify+0x1db/0x1f0 [cls_flower] [843.966010] ? skb_clone+0x53/0xc0 [ 843.969173] tcf_classify+0x24d/0x420 [ 843.972333] tc_run+0x8f/0xf0 [ 843.975465] __netif_receive_skb_core+0x67a/0x1080 [ 843.978634 ] ? dev_gro_receive+0x249/0x730 [843.981759] __netif_receive_skb_list_core+0x12d/0x260 [843.984869] netif_receive_skb_list_internal+0x1cb/0x2f0 [843.987957] ? mlx5e_handle_rx_cqe_mpwrq_rep+0xfa/0x1a0 [mlx5_core] [ 843.991170] napi_complete_done+0x72/0x1a0 [ 843.994305] mlx5e_napi_poll+0x28c/0x6d0 [mlx5_core] [ 843.997501] __napi_poll+0x25/0x1b0 [ 844.000627] net_rx_action+0x256/0x330 [ 844.003705] __do_softirq+0xb3/ 0x29b [ 844.006718] irq_exit_rcu+0x9e/0xc0 [ 844.009672] common_interrupt+0x86/0xa0 [ 844.012537] [ 844.015285] [ 844.017937] asm_common_interrupt+0x26 /0x40 [844.020591] RIP: 0010:acpi_safe_halt+0x1b/0x20 [ 844.023247] ---truncado ---"}], "id": "CVE-2023-52610", "lastModified": "2026-06-17T06:43:09.253", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2023-52610", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-06-21T16:09:12.830591Z", "version": "2.0.3"}}]}, "published": "2024-03-18T11:15:07.943", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Mailing List", "Patch"], "url": "https://git.kernel.org/stable/c/0b5b831122fc3789fff75be433ba3e4dd7b779d4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Mailing List", "Patch"], "url": "https://git.kernel.org/stable/c/172ba7d46c202e679f3ccb10264c67416aaeb1c4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Mailing List", "Patch"], "url": "https://git.kernel.org/stable/c/3f14b377d01d8357eba032b4cabc8c1149b458b6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Mailing List", "Patch"], "url": "https://git.kernel.org/stable/c/73f7da5fd124f2cda9161e2e46114915e6e82e97"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Mailing List", "Patch"], "url": "https://git.kernel.org/stable/c/f5346df0591d10bc948761ca854b1fae6d2ef441"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Patch"], "url": "https://git.kernel.org/stable/c/0b5b831122fc3789fff75be433ba3e4dd7b779d4"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Patch"], "url": "https://git.kernel.org/stable/c/172ba7d46c202e679f3ccb10264c67416aaeb1c4"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Patch"], "url": "https://git.kernel.org/stable/c/3f14b377d01d8357eba032b4cabc8c1149b458b6"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Patch"], "url": "https://git.kernel.org/stable/c/73f7da5fd124f2cda9161e2e46114915e6e82e97"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Patch"], "url": "https://git.kernel.org/stable/c/f5346df0591d10bc948761ca854b1fae6d2ef441"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-401"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2024:3627", "cpe": "cpe:/a:redhat:enterprise_linux:8::nfv", "package": "kernel-rt-0:4.18.0-553.5.1.rt7.346.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-06-05T00:00:00Z"}, {"advisory": "RHSA-2024:3618", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-553.5.1.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-06-05T00:00:00Z"}, {"advisory": "RHSA-2024:5692", "cpe": "cpe:/o:redhat:rhel_aus:8.6", "package": "kernel-0:4.18.0-372.119.1.el8_6", "product_name": "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support", "release_date": "2024-08-21T00:00:00Z"}, {"advisory": "RHSA-2024:5692", "cpe": "cpe:/o:redhat:rhel_tus:8.6", "package": "kernel-0:4.18.0-372.119.1.el8_6", "product_name": "Red Hat Enterprise Linux 8.6 Telecommunications Update Service", "release_date": "2024-08-21T00:00:00Z"}, {"advisory": "RHSA-2024:5692", "cpe": "cpe:/o:redhat:rhel_e4s:8.6", "package": "kernel-0:4.18.0-372.119.1.el8_6", "product_name": "Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions", "release_date": "2024-08-21T00:00:00Z"}, {"advisory": "RHSA-2024:5255", "cpe": "cpe:/o:redhat:rhel_eus:8.8", "package": "kernel-0:4.18.0-477.67.1.el8_8", "product_name": "Red Hat Enterprise Linux 8.8 Extended Update Support", "release_date": "2024-08-13T00:00:00Z"}, {"advisory": "RHSA-2024:2394", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-427.13.1.el9_4", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-04-30T00:00:00Z"}, {"advisory": "RHSA-2024:2394", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-427.13.1.el9_4", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-04-30T00:00:00Z"}], "bugzilla": {"description": "kernel: net/sched: act_ct: fix skb leak and crash on ooo frags", "id": "2270080", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2270080"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.4", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H", "status": "verified"}, "cwe": "CWE-402", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet/sched: act_ct: fix skb leak and crash on ooo frags\nact_ct adds skb->users before defragmentation. If frags arrive in order,\nthe last frag's reference is reset in:\ninet_frag_reasm_prepare\nskb_morph\nwhich is not straightforward.\nHowever when frags arrive out of order, nobody unref the last frag, and\nall frags are leaked. The situation is even worse, as initiating packet\ncapture can lead to a crash[0] when skb has been cloned and shared at the\nsame time.\nFix the issue by removing skb_get() before defragmentation. act_ct\nreturns TC_ACT_CONSUMED when defrag failed or in progress.\n[0]:\n[ 843.804823] ------------[ cut here ]------------\n[ 843.809659] kernel BUG at net/core/skbuff.c:2091!\n[ 843.814516] invalid opcode: 0000 [#1] PREEMPT SMP\n[ 843.819296] CPU: 7 PID: 0 Comm: swapper/7 Kdump: loaded Tainted: G S 6.7.0-rc3 #2\n[ 843.824107] Hardware name: XFUSION 1288H V6/BC13MBSBD, BIOS 1.29 11/25/2022\n[ 843.828953] RIP: 0010:pskb_expand_head+0x2ac/0x300\n[ 843.833805] Code: 8b 70 28 48 85 f6 74 82 48 83 c6 08 bf 01 00 00 00 e8 38 bd ff ff 8b 83 c0 00 00 00 48 03 83 c8 00 00 00 e9 62 ff ff ff 0f 0b <0f> 0b e8 8d d0 ff ff e9 b3 fd ff ff 81 7c 24 14 40 01 00 00 4c 89\n[ 843.843698] RSP: 0018:ffffc9000cce07c0 EFLAGS: 00010202\n[ 843.848524] RAX: 0000000000000002 RBX: ffff88811a211d00 RCX: 0000000000000820\n[ 843.853299] RDX: 0000000000000640 RSI: 0000000000000000 RDI: ffff88811a211d00\n[ 843.857974] RBP: ffff888127d39518 R08: 00000000bee97314 R09: 0000000000000000\n[ 843.862584] R10: 0000000000000000 R11: ffff8881109f0000 R12: 0000000000000880\n[ 843.867147] R13: ffff888127d39580 R14: 0000000000000640 R15: ffff888170f7b900\n[ 843.871680] FS: 0000000000000000(0000) GS:ffff889ffffc0000(0000) knlGS:0000000000000000\n[ 843.876242] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 843.880778] CR2: 00007fa42affcfb8 CR3: 000000011433a002 CR4: 0000000000770ef0\n[ 843.885336] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[ 843.889809] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n[ 843.894229] PKRU: 55555554\n[ 843.898539] Call Trace:\n[ 843.902772] <IRQ>\n[ 843.906922] ? __die_body+0x1e/0x60\n[ 843.911032] ? die+0x3c/0x60\n[ 843.915037] ? do_trap+0xe2/0x110\n[ 843.918911] ? pskb_expand_head+0x2ac/0x300\n[ 843.922687] ? do_error_trap+0x65/0x80\n[ 843.926342] ? pskb_expand_head+0x2ac/0x300\n[ 843.929905] ? exc_invalid_op+0x50/0x60\n[ 843.933398] ? pskb_expand_head+0x2ac/0x300\n[ 843.936835] ? asm_exc_invalid_op+0x1a/0x20\n[ 843.940226] ? pskb_expand_head+0x2ac/0x300\n[ 843.943580] inet_frag_reasm_prepare+0xd1/0x240\n[ 843.946904] ip_defrag+0x5d4/0x870\n[ 843.950132] nf_ct_handle_fragments+0xec/0x130 [nf_conntrack]\n[ 843.953334] tcf_ct_act+0x252/0xd90 [act_ct]\n[ 843.956473] ? tcf_mirred_act+0x516/0x5a0 [act_mirred]\n[ 843.959657] tcf_action_exec+0xa1/0x160\n[ 843.962823] fl_classify+0x1db/0x1f0 [cls_flower]\n[ 843.966010] ? skb_clone+0x53/0xc0\n[ 843.969173] tcf_classify+0x24d/0x420\n[ 843.972333] tc_run+0x8f/0xf0\n[ 843.975465] __netif_receive_skb_core+0x67a/0x1080\n[ 843.978634] ? dev_gro_receive+0x249/0x730\n[ 843.981759] __netif_receive_skb_list_core+0x12d/0x260\n[ 843.984869] netif_receive_skb_list_internal+0x1cb/0x2f0\n[ 843.987957] ? mlx5e_handle_rx_cqe_mpwrq_rep+0xfa/0x1a0 [mlx5_core]\n[ 843.991170] napi_complete_done+0x72/0x1a0\n[ 843.994305] mlx5e_napi_poll+0x28c/0x6d0 [mlx5_core]\n[ 843.997501] __napi_poll+0x25/0x1b0\n[ 844.000627] net_rx_action+0x256/0x330\n[ 844.003705] __do_softirq+0xb3/0x29b\n[ 844.006718] irq_exit_rcu+0x9e/0xc0\n[ 844.009672] common_interrupt+0x86/0xa0\n[ 844.012537] </IRQ>\n[ 844.015285] <TASK>\n[ 844.017937] asm_common_interrupt+0x26/0x40\n[ 844.020591] RIP: 0010:acpi_safe_halt+0x1b/0x20\n[ 844.023247] Code: ff 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 65 48 8b 04 25 00 18 03 00 48 8b 00 a8 08 75 0c 66 90 0f 00 2d 81 d0 44 00 fb\n---truncated---", "A memory leak flaw and potential kernel crash were found in the Linux kernel\u2019s Conntrack module. This issue occurs when Conntrack is being used by a local user for a specific configuration, and both fragmented packets are received remotely and out of order. This flaw allows a local or remote user to crash or potentially escalate their privileges on the system."], "mitigation": {"lang": "en:us", "value": "To mitigate this issue, prevent the Conntrack module from being loaded. Please see https://access.redhat.com/solutions/41278 for information on how to blacklist a kernel module to prevent it from loading automatically."}, "name": "CVE-2023-52610", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-03-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-52610\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-52610\nhttps://lore.kernel.org/linux-cve-announce/20240318100758.2828621-10-lee@kernel.org/T"], "threat_severity": "Moderate"}

{}