{"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"}}}}