{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64096", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T07:54:57.033Z", "datePublished": "2026-07-19T15:40:02.969Z", "dateUpdated": "2026-07-19T15:40:02.969Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-19T15:40:02.969Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: mcast: fix use-after-free in orig_node RCU release\n\nbatadv_mcast_purge_orig() removes entries from RCU-protected hlists but\ndoes not wait for an RCU grace period before returning. Concurrent RCU\nreaders may still accesses references to those entries at the point of\nremoval. RCU-protected readers trying to operate on entries like\norig->mcast_want_all_ipv6_node will then access already freed memory.\n\nFix this by moving batadv_mcast_purge_orig() to batadv_orig_node_release(),\njust before the call_rcu() invocation. This ensures RCU readers that were\nactive at purge time have drained before the orig_node memory is reclaimed."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/batman-adv/originator.c"], "versions": [{"version": "ab49886e3da73b6b35ece21006e191910427bb30", "lessThan": "ff3a4487ead475e27b43280b8ee3d8464fe280e1", "status": "affected", "versionType": "git"}, {"version": "ab49886e3da73b6b35ece21006e191910427bb30", "lessThan": "78a63fb2f7d5630d1c1f2859a20d4e4226863b41", "status": "affected", "versionType": "git"}, {"version": "ab49886e3da73b6b35ece21006e191910427bb30", "lessThan": "ced48f55bac73f0822eae90509e51b42b4f646c8", "status": "affected", "versionType": "git"}, {"version": "ab49886e3da73b6b35ece21006e191910427bb30", "lessThan": "70bcb678561f0fb58f33270fc73f12f3be72b878", "status": "affected", "versionType": "git"}, {"version": "ab49886e3da73b6b35ece21006e191910427bb30", "lessThan": "aef897c9d2dd0d9339167fb82b62beff68d076cb", "status": "affected", "versionType": "git"}, {"version": "ab49886e3da73b6b35ece21006e191910427bb30", "lessThan": "8a3707653ab658e082ccd992e92594e01b09a3fc", "status": "affected", "versionType": "git"}, {"version": "ab49886e3da73b6b35ece21006e191910427bb30", "lessThan": "edfb1e094104a50f931553dc82ac59246569fd32", "status": "affected", "versionType": "git"}, {"version": "ab49886e3da73b6b35ece21006e191910427bb30", "lessThan": "20c2d6a20ca936f5aaa6dd40f73f262ac45c87cc", "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/batman-adv/originator.c"], "versions": [{"version": "3.15", "status": "affected"}, {"version": "0", "lessThan": "3.15", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.258", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.209", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.175", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.142", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.92", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.34", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.11", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "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": "3.15", "versionEndExcluding": "5.10.258"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.15", "versionEndExcluding": "5.15.209"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.15", "versionEndExcluding": "6.1.175"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.15", "versionEndExcluding": "6.6.142"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.15", "versionEndExcluding": "6.12.92"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.15", "versionEndExcluding": "6.18.34"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.15", "versionEndExcluding": "7.0.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.15", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ff3a4487ead475e27b43280b8ee3d8464fe280e1"}, {"url": "https://git.kernel.org/stable/c/78a63fb2f7d5630d1c1f2859a20d4e4226863b41"}, {"url": "https://git.kernel.org/stable/c/ced48f55bac73f0822eae90509e51b42b4f646c8"}, {"url": "https://git.kernel.org/stable/c/70bcb678561f0fb58f33270fc73f12f3be72b878"}, {"url": "https://git.kernel.org/stable/c/aef897c9d2dd0d9339167fb82b62beff68d076cb"}, {"url": "https://git.kernel.org/stable/c/8a3707653ab658e082ccd992e92594e01b09a3fc"}, {"url": "https://git.kernel.org/stable/c/edfb1e094104a50f931553dc82ac59246569fd32"}, {"url": "https://git.kernel.org/stable/c/20c2d6a20ca936f5aaa6dd40f73f262ac45c87cc"}], "title": "batman-adv: mcast: fix use-after-free in orig_node RCU release", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"bugzilla": {"description": "kernel: batman-adv: mcast: fix use-after-free in orig_node RCU release", "id": "2502583", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502583"}, "csaw": false, "cwe": "CWE-825", "details": ["A flaw was found in the `batman-adv` (Better Approach To Mobile Ad-hoc Networking) multicast (mcast) module of the Linux kernel. The `batadv_mcast_purge_orig()` function removes entries from RCU (Read-Copy-Update)-protected lists without ensuring that all active readers have finished accessing those entries. This can lead to a use-after-free vulnerability, where concurrent operations may attempt to access memory that has already been released, potentially causing system instability or a denial of service."], "name": "CVE-2026-64096", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"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:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Fix deferred", "impact": "moderate", "package_name": "erlang27", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-07-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64096\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64096\nhttps://lore.kernel.org/linux-cve-announce/2026071919-CVE-2026-64096-f0fd@gregkh/T"]}

{}