{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-68123", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-30T09:28:09.369Z", "datePublished": "2026-08-10T11:58:43.727Z", "dateUpdated": "2026-08-10T11:58:43.727Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-10T11:58:43.727Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nopenvswitch: fix GSO userspace truncation underflow\n\nOVS_ACTION_ATTR_TRUNC currently stores a delta from the original skb\nlength in OVS_CB(skb)->cutlen. When a later userspace action segments a\nGSO skb, queue_gso_packets() reuses that delta for each smaller segment.\nA segment can then reach queue_userspace_packet() with cutlen greater\nthan skb->len, underflowing the length passed to skb_zerocopy().\n\nStore the maximum preserved length instead and bound each consumer\nagainst the current skb length. Use U32_MAX as the no-truncation\nsentinel so the value remains valid if skb geometry changes before a\nconsumer handles it."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/openvswitch/actions.c", "net/openvswitch/datapath.c", "net/openvswitch/datapath.h", "net/openvswitch/vport.c"], "versions": [{"version": "f2a4d086ed4c588d32fe9b7aa67fead7280e7bf1", "lessThan": "a16eaaf7c0b0ccdef6166707d90ffbc6eebf6855", "status": "affected", "versionType": "git"}, {"version": "f2a4d086ed4c588d32fe9b7aa67fead7280e7bf1", "lessThan": "fbfa3ad2ad6f3a5624aba5211c46290fb98cc9dc", "status": "affected", "versionType": "git"}, {"version": "f2a4d086ed4c588d32fe9b7aa67fead7280e7bf1", "lessThan": "100a23b1613e9218e0af654ef102352c713f0263", "status": "affected", "versionType": "git"}, {"version": "f2a4d086ed4c588d32fe9b7aa67fead7280e7bf1", "lessThan": "ea85dbcbe8d4056ecb54352f97743d138ea4c407", "status": "affected", "versionType": "git"}, {"version": "f2a4d086ed4c588d32fe9b7aa67fead7280e7bf1", "lessThan": "4032f8ed10fcb84d41c508dfb04be96589f78dfe", "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/openvswitch/actions.c", "net/openvswitch/datapath.c", "net/openvswitch/datapath.h", "net/openvswitch/vport.c"], "versions": [{"version": "4.8", "status": "affected"}, {"version": "0", "lessThan": "4.8", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.148", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.101", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.42", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.6", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2-rc5", "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": "4.8", "versionEndExcluding": "6.6.148"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.12.101"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.18.42"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "7.1.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "7.2-rc5"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/a16eaaf7c0b0ccdef6166707d90ffbc6eebf6855"}, {"url": "https://git.kernel.org/stable/c/fbfa3ad2ad6f3a5624aba5211c46290fb98cc9dc"}, {"url": "https://git.kernel.org/stable/c/100a23b1613e9218e0af654ef102352c713f0263"}, {"url": "https://git.kernel.org/stable/c/ea85dbcbe8d4056ecb54352f97743d138ea4c407"}, {"url": "https://git.kernel.org/stable/c/4032f8ed10fcb84d41c508dfb04be96589f78dfe"}], "title": "openvswitch: fix GSO userspace truncation underflow", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f2a4d086ed4c588d32fe9b7aa67fead7280e7bf1,a16eaaf7c0b0ccdef6166707d90ffbc6eebf6855)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f2a4d086ed4c588d32fe9b7aa67fead7280e7bf1,fbfa3ad2ad6f3a5624aba5211c46290fb98cc9dc)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f2a4d086ed4c588d32fe9b7aa67fead7280e7bf1,100a23b1613e9218e0af654ef102352c713f0263)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f2a4d086ed4c588d32fe9b7aa67fead7280e7bf1,ea85dbcbe8d4056ecb54352f97743d138ea4c407)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f2a4d086ed4c588d32fe9b7aa67fead7280e7bf1,4032f8ed10fcb84d41c508dfb04be96589f78dfe)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "4.8"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,4.8)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.148,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.101,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.42,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.6,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc5,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-10T13:45:03.571558+00:00", "updated": "2026-08-10T15:15:04.521744+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-193"]}