{"id":"CVE-2026-31598","revision":null,"records":[{"revision":"4a80e17a4fb84073ba3aff6a1eb2c1fb","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-31598","aliases":[],"title":"ocfs2: fix possible deadlock between unlink and dio_end_io_write","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: fix possible deadlock between unlink and dio_end_io_write\n\nocfs2_unlink takes orphan dir inode_lock first and then ip_alloc_sem,\nwhile in ocfs2_dio_end_io_write, it acquires these locks in reverse order.\nThis creates an ABBA lock ordering violation on lock classes\nocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE] and\nocfs2_file_ip_alloc_sem_key.\n\nLock Chain #0 (orphan dir inode_lock -> ip_alloc_sem):\nocfs2_unlink\n ocfs2_prepare_orphan_dir\n ocfs2_lookup_lock_orphan_dir\n inode_lock(orphan_dir_inode) <- lock A\n __ocfs2_prepare_orphan_dir\n ocfs2_prepare_dir_for_insert\n ocfs2_extend_dir\n\t ocfs2_expand_inline_dir\n\t down_write(&oi->ip_alloc_sem) <- Lock B\n\nLock Chain #1 (ip_alloc_sem -> orphan dir inode_lock):\nocfs2_dio_end_io_write\n down_write(&oi->ip_alloc_sem) <- Lock B\n ocfs2_del_inode_from_orphan()\n inode_lock(orphan_dir_inode) <- Lock A\n\nDeadlock Scenario:\n CPU0 (unlink) CPU1 (dio_end_io_write)\n ------ ------\n inode_lock(orphan_dir_inode)\n down_write(ip_alloc_sem)\n down_write(ip_alloc_sem)\n inode_lock(orphan_dir_inode)\n\nSince ip_alloc_sem is to protect allocation changes, which is unrelated\nwith operations in ocfs2_del_inode_from_orphan. So move\nocfs2_del_inode_from_orphan out of ip_alloc_sem to fix the deadlock.","state":0,"publishedAt":"2026-04-24T14:42:23.304+00:00","modifiedAt":"2026-10-19T18:55:59.744+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"fs/ocfs2/aops.c\"\n ],\n \"versions\": [\n {\n \"version\": \"a86a72a4a4e0ec109a98e2737948864ed6794bf7\",\n \"lessThan\": \"297d8d7bb6a2bf133d3a3636edbdf94101cbd719\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"a86a72a4a4e0ec109a98e2737948864ed6794bf7\",\n \"lessThan\": \"32630dee18c6bb2175c8a865a474749492eaf19c\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"a86a72a4a4e0ec109a98e2737948864ed6794bf7\",\n \"lessThan\": \"93f35419eb84d58820040642cb6e7528fe4aba7a\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"a86a72a4a4e0ec109a98e2737948864ed6794bf7\",\n \"lessThan\": \"4b80b5a838a32437f2cae0662578bac216a2c51a\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"a86a72a4a4e0ec109a98e2737948864ed6794bf7\",\n \"lessThan\": \"2b884d52273c60c298bd570163e8053657bbaff6\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"a86a72a4a4e0ec109a98e2737948864ed6794bf7\",\n \"lessThan\": \"bc0fb5c7d54c78be43a536df0e20dee32adb27d3\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"a86a72a4a4e0ec109a98e2737948864ed6794bf7\",\n \"lessThan\": \"f9fb1a7b635849322e1d7b7b6b26389778ec8e82\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"a86a72a4a4e0ec109a98e2737948864ed6794bf7\",\n \"lessThan\": \"e049f7a9bd80b7319590789ea5e1c523d6339d91\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"a86a72a4a4e0ec109a98e2737948864ed6794bf7\",\n \"lessThan\": \"b02da26a992db0c0e2559acbda0fc48d4a2fd337\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"fs/ocfs2/aops.c\"\n ],\n \"versions\": [\n {\n \"version\": \"4.6\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"4.6\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.258\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.209\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.175\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.136\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.83\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.24\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.19.14\",\n \"lessThanOrEqual\": \"6.19.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.0.1\",\n \"lessThanOrEqual\": \"7.0.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.1\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/297d8d7bb6a2bf133d3a3636edbdf94101cbd719","https://git.kernel.org/stable/c/32630dee18c6bb2175c8a865a474749492eaf19c","https://git.kernel.org/stable/c/93f35419eb84d58820040642cb6e7528fe4aba7a","https://git.kernel.org/stable/c/4b80b5a838a32437f2cae0662578bac216a2c51a","https://git.kernel.org/stable/c/2b884d52273c60c298bd570163e8053657bbaff6","https://git.kernel.org/stable/c/bc0fb5c7d54c78be43a536df0e20dee32adb27d3","https://git.kernel.org/stable/c/f9fb1a7b635849322e1d7b7b6b26389778ec8e82","https://git.kernel.org/stable/c/e049f7a9bd80b7319590789ea5e1c523d6339d91","https://git.kernel.org/stable/c/b02da26a992db0c0e2559acbda0fc48d4a2fd337"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-31598","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-31598","identifiers":["CVE-2026-31598"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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No reader inventory is sent.","generation":"enrichment-ddc095a411c54633beb68aaff30b70cb","complete":true,"records":13666,"lastAttemptAt":"2026-11-08T21:02:34.4952279+00:00","lastSuccessAt":"2026-11-08T21:02:34.481+00:00","error":null,"lastVerifiedAt":"2026-11-08T21:02:34.481+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13706,"expectedIdentifiers":13706,"failedIdentifiers":0},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-980593e6977a6d1b4fb1eed5a1ffe88a468736f89f0a06f710924ad59132c023","complete":true,"records":9914,"lastAttemptAt":"2026-11-08T21:02:31.7841816+00:00","lastSuccessAt":"2026-11-08T11:07:07.068788+00:00","error":null,"lastVerifiedAt":"2026-11-08T21:02:31.7841816+00:00","snapshotPublishedAt":"2026-11-08T11:02:46+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-fde804134ecdda0ddd5ff5c26ee1fff5a6fa659311f7ef2e51c6ad54964db0e2","complete":true,"records":1971,"lastAttemptAt":"2026-11-08T21:02:31.5325642+00:00","lastSuccessAt":"2026-11-06T19:03:17.0399903+00:00","error":null,"lastVerifiedAt":"2026-11-08T21:02:31.5325642+00:00","snapshotPublishedAt":"2026-11-06T18:17:57+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-964c14035e6f0f6478b2870fad6a7ef9f6045876d4a12af2c2e514521e54b6af","complete":true,"records":3055,"lastAttemptAt":"2026-11-08T21:02:31.8040207+00:00","lastSuccessAt":"2026-11-08T11:07:12.1927025+00:00","error":null,"lastVerifiedAt":"2026-11-08T21:02:31.8040207+00:00","snapshotPublishedAt":"2026-11-08T11:02:46+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-f8647d7ba64b1ba0dfdc7130944766d5b36d5b77d18fff0c79e651a4cff3c2b9","complete":true,"records":231293,"lastAttemptAt":"2026-11-08T21:02:31.6506398+00:00","lastSuccessAt":"2026-11-08T11:06:56.2918717+00:00","error":null,"lastVerifiedAt":"2026-11-08T21:02:31.6506398+00:00","snapshotPublishedAt":"2026-11-08T11:02:50+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}