{"id":"CVE-2026-23223","state":"PUBLISHED","title":"xfs: fix UAF in xchk_btree_check_block_owner","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfs: fix UAF in xchk_btree_check_block_owner\n\nWe cannot dereference bs->cur when trying to determine if bs->cur\naliases bs->sc->sa.{bno,rmap}_cur after the latter has been freed.\nFix this by sampling before type before any freeing could happen.\nThe correct temporal ordering was broken when we removed xfs_btnum_t.","publishedAt":"2026-02-18T14:53:26.603Z","updatedAt":"2026-05-11T22:02:42.267Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ec793e690f801d97a7ae2a0d429fea1fee4d44aa","status":"affected","lessThan":"1d411278dda293a507cb794db7d9ed3511c685c6","versionType":"git"},{"version":"ec793e690f801d97a7ae2a0d429fea1fee4d44aa","status":"affected","lessThan":"ed82e7949f5cac3058f4100f3cd670531d41a266","versionType":"git"},{"version":"ec793e690f801d97a7ae2a0d429fea1fee4d44aa","status":"affected","lessThan":"ba5264610423d9653aa36920520902d83841bcfd","versionType":"git"},{"version":"ec793e690f801d97a7ae2a0d429fea1fee4d44aa","status":"affected","lessThan":"1c253e11225bc5167217897885b85093e17c2217","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/xfs/scrub/btree.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.9","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.9","versionType":"semver"},{"version":"6.12.72","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.11","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.1","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/xfs/scrub/btree.c"]}],"references":["https://git.kernel.org/stable/c/1d411278dda293a507cb794db7d9ed3511c685c6","https://git.kernel.org/stable/c/ed82e7949f5cac3058f4100f3cd670531d41a266","https://git.kernel.org/stable/c/ba5264610423d9653aa36920520902d83841bcfd","https://git.kernel.org/stable/c/1c253e11225bc5167217897885b85093e17c2217"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:21.040Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/23xxx/CVE-2026-23223.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-23223","state":"PUBLISHED","datePublished":"2026-02-18T14:53:26.603Z","dateUpdated":"2026-05-11T22:02:42.267Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-01-13T15:37:45.987Z"},"containers":{"cna":{"title":"xfs: fix UAF in xchk_btree_check_block_owner","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfs: fix UAF in xchk_btree_check_block_owner\n\nWe cannot dereference bs->cur when trying to determine if bs->cur\naliases bs->sc->sa.{bno,rmap}_cur after the latter has been freed.\nFix this by sampling before type before any freeing could happen.\nThe correct temporal ordering was broken when we removed xfs_btnum_t."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ec793e690f801d97a7ae2a0d429fea1fee4d44aa","status":"affected","lessThan":"1d411278dda293a507cb794db7d9ed3511c685c6","versionType":"git"},{"version":"ec793e690f801d97a7ae2a0d429fea1fee4d44aa","status":"affected","lessThan":"ed82e7949f5cac3058f4100f3cd670531d41a266","versionType":"git"},{"version":"ec793e690f801d97a7ae2a0d429fea1fee4d44aa","status":"affected","lessThan":"ba5264610423d9653aa36920520902d83841bcfd","versionType":"git"},{"version":"ec793e690f801d97a7ae2a0d429fea1fee4d44aa","status":"affected","lessThan":"1c253e11225bc5167217897885b85093e17c2217","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/xfs/scrub/btree.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.9","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.9","versionType":"semver"},{"version":"6.12.72","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.11","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.1","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/xfs/scrub/btree.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/1d411278dda293a507cb794db7d9ed3511c685c6"},{"url":"https://git.kernel.org/stable/c/ed82e7949f5cac3058f4100f3cd670531d41a266"},{"url":"https://git.kernel.org/stable/c/ba5264610423d9653aa36920520902d83841bcfd"},{"url":"https://git.kernel.org/stable/c/1c253e11225bc5167217897885b85093e17c2217"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T22:02:42.267Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"6.12.72"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"6.18.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"6.19.1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"7.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}