CVE-2026-31598

{"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": "2026-10-19T18:55:59.744Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:23:42.417Z"}, "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"}, "scenarios": [{"lang": "en", "value": "AV:N - Although the core bug is in ocfs2 filesystem code, ocfs2 is exportable and nfsd can issue direct writes with IOCB_DIRECT while remote REMOVE operations reach vfs_unlink, making the vulnerable lock chains reachable over the network on a writable exported ocfs2 volume.\nAC:L - The bug is an ABBA deadlock where the attacker can drive both sides with concurrent extending direct writes and unlink/remove operations. Once the target deployment exposes those operations, winning the race is attacker-controlled.\nPR:N - A remote NFS client can trigger the operations through an exported writable share without kernel capabilities on the target. In permissive or anonymous export scenarios, no prior authenticated privileges are required.\nUI:N - No victim user action is required after the vulnerable service/filesystem is available. The attacker can send the write and remove operations directly.\nS:U - The impact remains within the same kernel/filesystem security authority. There is no VM escape, sandbox boundary crossing, or separate security scope.\nC:N - The issue is a lock-ordering deadlock, not memory corruption or information disclosure. It does not provide a read primitive or leak data.\nI:N - The vulnerable behavior does not corrupt memory or allow unauthorized data modification. It only causes threads to block on locks.\nA:H - The deadlock can permanently hang ocfs2 operations and affected kernel worker/syscall contexts. A kernel/filesystem hang is a high availability impact."}]}], "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": "297d8d7bb6a2bf133d3a3636edbdf94101cbd719", "status": "affected", "versionType": "git"}, {"version": "a86a72a4a4e0ec109a98e2737948864ed6794bf7", "lessThan": "32630dee18c6bb2175c8a865a474749492eaf19c", "status": "affected", "versionType": "git"}, {"version": "a86a72a4a4e0ec109a98e2737948864ed6794bf7", "lessThan": "93f35419eb84d58820040642cb6e7528fe4aba7a", "status": "affected", "versionType": "git"}, {"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": "5.10.258", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.209", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.175", "lessThanOrEqual": "6.1.*", "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", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": 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"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"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/297d8d7bb6a2bf133d3a3636edbdf94101cbd719"}, {"url": "https://git.kernel.org/stable/c/32630dee18c6bb2175c8a865a474749492eaf19c"}, {"url": "https://git.kernel.org/stable/c/93f35419eb84d58820040642cb6e7528fe4aba7a"}, {"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"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-31598", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-16T15:11:06.751234Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-362", "description": "CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-19T18:55:59.744Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-31598", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-16T15:11:06.751234Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-362", "description": "CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T15:11:07.315Z"}}], "cna": {"title": "ocfs2: fix possible deadlock between unlink and dio_end_io_write", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 7.5, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}, "scenarios": [{"lang": "en", "value": "AV:N - Although the core bug is in ocfs2 filesystem code, ocfs2 is exportable and nfsd can issue direct writes with IOCB_DIRECT while remote REMOVE operations reach vfs_unlink, making the vulnerable lock chains reachable over the network on a writable exported ocfs2 volume.\nAC:L - The bug is an ABBA deadlock where the attacker can drive both sides with concurrent extending direct writes and unlink/remove operations. Once the target deployment exposes those operations, winning the race is attacker-controlled.\nPR:N - A remote NFS client can trigger the operations through an exported writable share without kernel capabilities on the target. In permissive or anonymous export scenarios, no prior authenticated privileges are required.\nUI:N - No victim user action is required after the vulnerable service/filesystem is available. The attacker can send the write and remove operations directly.\nS:U - The impact remains within the same kernel/filesystem security authority. There is no VM escape, sandbox boundary crossing, or separate security scope.\nC:N - The issue is a lock-ordering deadlock, not memory corruption or information disclosure. It does not provide a read primitive or leak data.\nI:N - The vulnerable behavior does not corrupt memory or allow unauthorized data modification. It only causes threads to block on locks.\nA:H - The deadlock can permanently hang ocfs2 operations and affected kernel worker/syscall contexts. A kernel/filesystem hang is a high availability impact."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "a86a72a4a4e0ec109a98e2737948864ed6794bf7", "lessThan": "297d8d7bb6a2bf133d3a3636edbdf94101cbd719", "versionType": "git"}, {"status": "affected", "version": "a86a72a4a4e0ec109a98e2737948864ed6794bf7", "lessThan": "32630dee18c6bb2175c8a865a474749492eaf19c", "versionType": "git"}, {"status": "affected", "version": "a86a72a4a4e0ec109a98e2737948864ed6794bf7", "lessThan": "93f35419eb84d58820040642cb6e7528fe4aba7a", "versionType": "git"}, {"status": "affected", "version": "a86a72a4a4e0ec109a98e2737948864ed6794bf7", "lessThan": "4b80b5a838a32437f2cae0662578bac216a2c51a", "versionType": "git"}, {"status": "affected", "version": "a86a72a4a4e0ec109a98e2737948864ed6794bf7", "lessThan": "2b884d52273c60c298bd570163e8053657bbaff6", "versionType": "git"}, {"status": "affected", "version": "a86a72a4a4e0ec109a98e2737948864ed6794bf7", "lessThan": "bc0fb5c7d54c78be43a536df0e20dee32adb27d3", "versionType": "git"}, {"status": "affected", "version": "a86a72a4a4e0ec109a98e2737948864ed6794bf7", "lessThan": "f9fb1a7b635849322e1d7b7b6b26389778ec8e82", "versionType": "git"}, {"status": "affected", "version": "a86a72a4a4e0ec109a98e2737948864ed6794bf7", "lessThan": "e049f7a9bd80b7319590789ea5e1c523d6339d91", "versionType": "git"}, {"status": "affected", "version": "a86a72a4a4e0ec109a98e2737948864ed6794bf7", "lessThan": "b02da26a992db0c0e2559acbda0fc48d4a2fd337", "versionType": "git"}], "programFiles": ["fs/ocfs2/aops.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "4.6"}, {"status": "unaffected", "version": "0", "lessThan": "4.6", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.258", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.209", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.175", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.136", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.83", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.24", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "6.19.14", "versionType": "semver", "lessThanOrEqual": "6.19.*"}, {"status": "unaffected", "version": "7.0.1", "versionType": "semver", "lessThanOrEqual": "7.0.*"}, {"status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["fs/ocfs2/aops.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/297d8d7bb6a2bf133d3a3636edbdf94101cbd719"}, {"url": "https://git.kernel.org/stable/c/32630dee18c6bb2175c8a865a474749492eaf19c"}, {"url": "https://git.kernel.org/stable/c/93f35419eb84d58820040642cb6e7528fe4aba7a"}, {"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"}], "x_generator": {"engine": "bippy-1.2.0"}, "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."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.258", "versionStartIncluding": "4.6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.209", "versionStartIncluding": "4.6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.175", "versionStartIncluding": "4.6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.136", "versionStartIncluding": "4.6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.83", "versionStartIncluding": "4.6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.24", "versionStartIncluding": "4.6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.19.14", "versionStartIncluding": "4.6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.0.1", "versionStartIncluding": "4.6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1", "versionStartIncluding": "4.6"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:23:42.417Z"}}}, "cveMetadata": {"cveId": "CVE-2026-31598", "state": "PUBLISHED", "dateUpdated": "2026-10-19T18:55:59.744Z", "dateReserved": "2026-03-09T15:48:24.121Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-04-24T14:42:23.304Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/ocfs2/aops.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "297d8d7bb6a2bf133d3a3636edbdf94101cbd719", "status": "affected", "version": "a86a72a4a4e0ec109a98e2737948864ed6794bf7", "versionType": "git"}, {"lessThan": "32630dee18c6bb2175c8a865a474749492eaf19c", "status": "affected", "version": "a86a72a4a4e0ec109a98e2737948864ed6794bf7", "versionType": "git"}, {"lessThan": "93f35419eb84d58820040642cb6e7528fe4aba7a", "status": "affected", "version": "a86a72a4a4e0ec109a98e2737948864ed6794bf7", "versionType": "git"}, {"lessThan": "4b80b5a838a32437f2cae0662578bac216a2c51a", "status": "affected", "version": "a86a72a4a4e0ec109a98e2737948864ed6794bf7", "versionType": "git"}, {"lessThan": "2b884d52273c60c298bd570163e8053657bbaff6", "status": "affected", "version": "a86a72a4a4e0ec109a98e2737948864ed6794bf7", "versionType": "git"}, {"lessThan": "bc0fb5c7d54c78be43a536df0e20dee32adb27d3", "status": "affected", "version": "a86a72a4a4e0ec109a98e2737948864ed6794bf7", "versionType": "git"}, {"lessThan": "f9fb1a7b635849322e1d7b7b6b26389778ec8e82", "status": "affected", "version": "a86a72a4a4e0ec109a98e2737948864ed6794bf7", "versionType": "git"}, {"lessThan": "e049f7a9bd80b7319590789ea5e1c523d6339d91", "status": "affected", "version": "a86a72a4a4e0ec109a98e2737948864ed6794bf7", "versionType": "git"}, {"lessThan": "b02da26a992db0c0e2559acbda0fc48d4a2fd337", "status": "affected", "version": "a86a72a4a4e0ec109a98e2737948864ed6794bf7", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/ocfs2/aops.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.6"}, {"lessThan": "4.6", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.258", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.209", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.175", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.136", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.83", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.24", "versionType": "semver"}, {"lessThanOrEqual": "6.19.*", "status": "unaffected", "version": "6.19.14", "versionType": "semver"}, {"lessThanOrEqual": "7.0.*", "status": "unaffected", "version": "7.0.1", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "7A6CE177-C7BA-4E34-9D61-035565B5FFF5", "versionEndExcluding": "6.6.136", "versionStartIncluding": "4.6", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "7F0AE5B5-23AC-4DCC-B37A-51CA1DAE7BA8", "versionEndExcluding": "6.12.83", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "8126B8B8-6D0B-4443-86C1-672AEE893555", "versionEndExcluding": "6.18.24", "versionStartIncluding": "6.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "D6A8A074-BBF4-4803-ABED-519A839435BB", "versionEndExcluding": "6.19.14", "versionStartIncluding": "6.19", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "9B5888AB-7403-4335-89E4-21CC0B48366A", "versionEndExcluding": "7.0.1", "versionStartIncluding": "7.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "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."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nocfs2: soluciona un posible interbloqueo entre unlink y dio_end_io_write\n\nocfs2_unlink toma primero inode_lock del directorio hu\u00e9rfano y luego ip_alloc_sem,\nmientras que en ocfs2_dio_end_io_write, adquiere estos bloqueos en orden inverso.\nEsto crea una violaci\u00f3n del orden de bloqueo ABBA en las clases de bloqueo\nocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE] y\nocfs2_file_ip_alloc_sem_key.\n\nCadena de Bloqueo #0 (inode_lock del directorio hu\u00e9rfano -> ip_alloc_sem):\nocfs2_unlink\n ocfs2_prepare_orphan_dir\n ocfs2_lookup_lock_orphan_dir\n inode_lock(orphan_dir_inode) <- bloqueo 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(ref:oi -> ip_alloc_sem) <- Bloqueo B\n\nCadena de Bloqueo #1 (ip_alloc_sem -> inode_lock del directorio hu\u00e9rfano):\nocfs2_dio_end_io_write\n down_write(ref:oi -> ip_alloc_sem) <- Bloqueo B\n ocfs2_del_inode_from_orphan()\n inode_lock(orphan_dir_inode) <- Bloqueo A\n\nEscenario de Interbloqueo:\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\nDado que ip_alloc_sem est\u00e1 destinado a proteger los cambios de asignaci\u00f3n, lo cual no est\u00e1 relacionado\ncon las operaciones en ocfs2_del_inode_from_orphan. Por lo tanto, se mueve\nocfs2_del_inode_from_orphan fuera de ip_alloc_sem para solucionar el interbloqueo."}], "id": "CVE-2026-31598", "lastModified": "2026-11-11T23:10:00.263", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-31598", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T15:11:06.751234Z", "version": "2.0.3"}}]}, "published": "2026-04-24T15:16:37.560", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/297d8d7bb6a2bf133d3a3636edbdf94101cbd719"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2b884d52273c60c298bd570163e8053657bbaff6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/32630dee18c6bb2175c8a865a474749492eaf19c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4b80b5a838a32437f2cae0662578bac216a2c51a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/93f35419eb84d58820040642cb6e7528fe4aba7a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b02da26a992db0c0e2559acbda0fc48d4a2fd337"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/bc0fb5c7d54c78be43a536df0e20dee32adb27d3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e049f7a9bd80b7319590789ea5e1c523d6339d91"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f9fb1a7b635849322e1d7b7b6b26389778ec8e82"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-667"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-362"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: ocfs2: fix possible deadlock between unlink and dio_end_io_write", "id": "2461441", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2461441"}, "csaw": false, "cwe": "CWE-833", "details": ["A flaw was found in the ocfs2 file system within the Linux kernel. A local user could potentially trigger a deadlock due to an ABBA lock ordering violation between the `ocfs2_unlink` and `ocfs2_dio_end_io_write` functions. This race condition, caused by inconsistent lock acquisition order, could lead to a system hang, resulting in a Denial of Service (DoS)."], "name": "CVE-2026-31598", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-04-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-31598\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-31598\nhttps://lore.kernel.org/linux-cve-announce/2026042417-CVE-2026-31598-6408@gregkh/T"]}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[a86a72a4a4e0ec109a98e2737948864ed6794bf7,4b80b5a838a32437f2cae0662578bac216a2c51a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[a86a72a4a4e0ec109a98e2737948864ed6794bf7,2b884d52273c60c298bd570163e8053657bbaff6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[a86a72a4a4e0ec109a98e2737948864ed6794bf7,bc0fb5c7d54c78be43a536df0e20dee32adb27d3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[a86a72a4a4e0ec109a98e2737948864ed6794bf7,f9fb1a7b635849322e1d7b7b6b26389778ec8e82)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[a86a72a4a4e0ec109a98e2737948864ed6794bf7,e049f7a9bd80b7319590789ea5e1c523d6339d91)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[a86a72a4a4e0ec109a98e2737948864ed6794bf7,b02da26a992db0c0e2559acbda0fc48d4a2fd337)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "4.6"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.6)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.136,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.83,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.24,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.14,6.20.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.1,7.1.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-04-27T19:00:15.636989+00:00", "updated": "2026-10-19T21:30:03.916037+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}