{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-31598","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-03-09T15:48:24.121Z","datePublished":"2026-04-24T14:42:23.304Z","dateUpdated":"2026-05-11T22:11:53.227Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T22:11:53.227Z"},"descriptions":[{"lang":"en","value":"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."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH"}}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ocfs2/aops.c"],"versions":[{"version":"a86a72a4a4e0ec109a98e2737948864ed6794bf7","lessThan":"4b80b5a838a32437f2cae0662578bac216a2c51a","status":"affected","versionType":"git"},{"version":"a86a72a4a4e0ec109a98e2737948864ed6794bf7","lessThan":"2b884d52273c60c298bd570163e8053657bbaff6","status":"affected","versionType":"git"},{"version":"a86a72a4a4e0ec109a98e2737948864ed6794bf7","lessThan":"bc0fb5c7d54c78be43a536df0e20dee32adb27d3","status":"affected","versionType":"git"},{"version":"a86a72a4a4e0ec109a98e2737948864ed6794bf7","lessThan":"f9fb1a7b635849322e1d7b7b6b26389778ec8e82","status":"affected","versionType":"git"},{"version":"a86a72a4a4e0ec109a98e2737948864ed6794bf7","lessThan":"e049f7a9bd80b7319590789ea5e1c523d6339d91","status":"affected","versionType":"git"},{"version":"a86a72a4a4e0ec109a98e2737948864ed6794bf7","lessThan":"b02da26a992db0c0e2559acbda0fc48d4a2fd337","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ocfs2/aops.c"],"versions":[{"version":"4.6","status":"affected"},{"version":"0","lessThan":"4.6","status":"unaffected","versionType":"semver"},{"version":"6.6.136","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.83","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.24","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19.14","lessThanOrEqual":"6.19.*","status":"unaffected","versionType":"semver"},{"version":"7.0.1","lessThanOrEqual":"7.0.*","status":"unaffected","versionType":"semver"},{"version":"7.1-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":"4.6","versionEndExcluding":"6.6.136"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6","versionEndExcluding":"6.12.83"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6","versionEndExcluding":"6.18.24"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6","versionEndExcluding":"6.19.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6","versionEndExcluding":"7.0.1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.6","versionEndExcluding":"7.1-rc1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/4b80b5a838a32437f2cae0662578bac216a2c51a"},{"url":"https://git.kernel.org/stable/c/2b884d52273c60c298bd570163e8053657bbaff6"},{"url":"https://git.kernel.org/stable/c/bc0fb5c7d54c78be43a536df0e20dee32adb27d3"},{"url":"https://git.kernel.org/stable/c/f9fb1a7b635849322e1d7b7b6b26389778ec8e82"},{"url":"https://git.kernel.org/stable/c/e049f7a9bd80b7319590789ea5e1c523d6339d91"},{"url":"https://git.kernel.org/stable/c/b02da26a992db0c0e2559acbda0fc48d4a2fd337"}],"title":"ocfs2: fix possible deadlock between unlink and dio_end_io_write","x_generator":{"engine":"bippy-1.2.0"}}}}