{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-80845", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.797Z", "datePublished": "2026-09-04T15:54:55.489Z", "dateUpdated": "2026-09-04T15:54:55.489Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-04T15:54:55.489Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: avoid lock inversion in nat keepalive work\n\nnat_keepalive_work() walks the state table while xfrm_state_walk()\nholds net->xfrm.xfrm_state_lock. Its callback then acquires x->lock,\nwhich conflicts with the delete path taking the same locks in reverse\norder via xfrm_state_delete() and __xfrm_state_delete(). This creates\nan AB-BA deadlock that is reported by lockdep when a NAT keepalive\nworker races with SA deletion.\n\nFix this by splitting the keepalive walk into two phases. First,\ncollect the candidate states while the walk holds xfrm_state_lock and\ntake a reference on each state. Then, after the walk completes, process\neach collected state and acquire x->lock without nesting it under\nxfrm_state_lock."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/xfrm/xfrm_nat_keepalive.c"], "versions": [{"version": "f531d13bdfe3f4f084aaa8acae2cb0f02295f5ae", "lessThan": "ea09210462316e5235a25eccb11ad0708d86615e", "status": "affected", "versionType": "git"}, {"version": "f531d13bdfe3f4f084aaa8acae2cb0f02295f5ae", "lessThan": "5c86c895d1cac81a71ead3005084c6265cf6a7a5", "status": "affected", "versionType": "git"}, {"version": "f531d13bdfe3f4f084aaa8acae2cb0f02295f5ae", "lessThan": "89ef3a2e1e4682ab82b0455ce113f8c39fb9e50d", "status": "affected", "versionType": "git"}, {"version": "f531d13bdfe3f4f084aaa8acae2cb0f02295f5ae", "lessThan": "a9fa05b7a1246797748d15771052639e0d3cabf1", "status": "affected", "versionType": "git"}, {"version": "f531d13bdfe3f4f084aaa8acae2cb0f02295f5ae", "lessThan": "763fe700b7c58ad64fe5202c5638848244dd4127", "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/xfrm/xfrm_nat_keepalive.c"], "versions": [{"version": "6.11", "status": "affected"}, {"version": "0", "lessThan": "6.11", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.108", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.49", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.13", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.3", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3-rc1", "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": "6.11", "versionEndExcluding": "6.12.108"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "6.18.49"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "7.1.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "7.2.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "7.3-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ea09210462316e5235a25eccb11ad0708d86615e"}, {"url": "https://git.kernel.org/stable/c/5c86c895d1cac81a71ead3005084c6265cf6a7a5"}, {"url": "https://git.kernel.org/stable/c/89ef3a2e1e4682ab82b0455ce113f8c39fb9e50d"}, {"url": "https://git.kernel.org/stable/c/a9fa05b7a1246797748d15771052639e0d3cabf1"}, {"url": "https://git.kernel.org/stable/c/763fe700b7c58ad64fe5202c5638848244dd4127"}], "title": "xfrm: avoid lock inversion in nat keepalive work", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/xfrm/xfrm_nat_keepalive.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "ea09210462316e5235a25eccb11ad0708d86615e", "status": "affected", "version": "f531d13bdfe3f4f084aaa8acae2cb0f02295f5ae", "versionType": "git"}, {"lessThan": "5c86c895d1cac81a71ead3005084c6265cf6a7a5", "status": "affected", "version": "f531d13bdfe3f4f084aaa8acae2cb0f02295f5ae", "versionType": "git"}, {"lessThan": "89ef3a2e1e4682ab82b0455ce113f8c39fb9e50d", "status": "affected", "version": "f531d13bdfe3f4f084aaa8acae2cb0f02295f5ae", "versionType": "git"}, {"lessThan": "a9fa05b7a1246797748d15771052639e0d3cabf1", "status": "affected", "version": "f531d13bdfe3f4f084aaa8acae2cb0f02295f5ae", "versionType": "git"}, {"lessThan": "763fe700b7c58ad64fe5202c5638848244dd4127", "status": "affected", "version": "f531d13bdfe3f4f084aaa8acae2cb0f02295f5ae", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/xfrm/xfrm_nat_keepalive.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.11"}, {"lessThan": "6.11", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.108", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.49", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.13", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.3", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3-rc1", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: avoid lock inversion in nat keepalive work\n\nnat_keepalive_work() walks the state table while xfrm_state_walk()\nholds net->xfrm.xfrm_state_lock. Its callback then acquires x->lock,\nwhich conflicts with the delete path taking the same locks in reverse\norder via xfrm_state_delete() and __xfrm_state_delete(). This creates\nan AB-BA deadlock that is reported by lockdep when a NAT keepalive\nworker races with SA deletion.\n\nFix this by splitting the keepalive walk into two phases. First,\ncollect the candidate states while the walk holds xfrm_state_lock and\ntake a reference on each state. Then, after the walk completes, process\neach collected state and acquire x->lock without nesting it under\nxfrm_state_lock."}], "id": "CVE-2026-80845", "lastModified": "2026-09-04T16:18:13.173", "metrics": {}, "published": "2026-09-04T16:18:13.173", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5c86c895d1cac81a71ead3005084c6265cf6a7a5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/763fe700b7c58ad64fe5202c5638848244dd4127"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/89ef3a2e1e4682ab82b0455ce113f8c39fb9e50d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a9fa05b7a1246797748d15771052639e0d3cabf1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ea09210462316e5235a25eccb11ad0708d86615e"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}