CVE-2026-64187

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It came from an AI-assisted code audit of the\nrecovery parser.\n\nxlog_recover_reorder_trans() calls ITEM_TYPE() on the item, which reads\n*(unsigned short *)item->ri_buf[0].iov_base and faults on the NULL\nri_buf. Reject it there, before the commit handlers that also read\nri_buf[0].\n\n KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\n RIP: 0010:xlog_recover_reorder_trans (fs/xfs/xfs_log_recover.c:1836)\n xlog_recover_commit_trans (fs/xfs/xfs_log_recover.c:2043)\n xlog_recover_process_data (fs/xfs/xfs_log_recover.c:2501)\n xlog_do_recovery_pass (fs/xfs/xfs_log_recover.c:3244)\n xlog_recover (fs/xfs/xfs_log_recover.c:3493)\n xfs_log_mount (fs/xfs/xfs_log.c:618)\n xfs_mountfs (fs/xfs/xfs_mount.c:1034)\n xfs_fs_fill_super (fs/xfs/xfs_super.c:1938)\n vfs_get_tree (fs/super.c:1695)\n path_mount (fs/namespace.c:4161)\n __x64_sys_mount (fs/namespace.c:4367)"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/xfs/xfs_log_recover.c"], "versions": [{"version": "89cebc8477290b152618ffa110bbeae340d50900", "lessThan": 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{"id": "CVE-2026-64187", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-06T16:31:54.393338Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-06T16:34:29.301Z"}}]}}

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It came from an AI-assisted code audit of the\nrecovery parser.\n\nxlog_recover_reorder_trans() calls ITEM_TYPE() on the item, which reads\n*(unsigned short *)item->ri_buf[0].iov_base and faults on the NULL\nri_buf. Reject it there, before the commit handlers that also read\nri_buf[0].\n\n KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\n RIP: 0010:xlog_recover_reorder_trans (fs/xfs/xfs_log_recover.c:1836)\n xlog_recover_commit_trans (fs/xfs/xfs_log_recover.c:2043)\n xlog_recover_process_data (fs/xfs/xfs_log_recover.c:2501)\n xlog_do_recovery_pass (fs/xfs/xfs_log_recover.c:3244)\n xlog_recover (fs/xfs/xfs_log_recover.c:3493)\n xfs_log_mount (fs/xfs/xfs_log.c:618)\n xfs_mountfs (fs/xfs/xfs_mount.c:1034)\n xfs_fs_fill_super (fs/xfs/xfs_super.c:1938)\n vfs_get_tree (fs/super.c:1695)\n path_mount (fs/namespace.c:4161)\n __x64_sys_mount (fs/namespace.c:4367)"}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.212", "versionStartIncluding": "4.3"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.178", "versionStartIncluding": "4.3"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.145", "versionStartIncluding": "4.3"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.96", "versionStartIncluding": "4.3"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.39", "versionStartIncluding": "4.3"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1.4", "versionStartIncluding": "4.3"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.2", "versionStartIncluding": "4.3"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T04:51:48.578Z"}}}, "cveMetadata": {"cveId": "CVE-2026-64187", "state": "PUBLISHED", "dateUpdated": "2026-11-06T16:34:29.301Z", "dateReserved": "2026-07-19T07:54:57.040Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-07-20T16:27:46.653Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/xfs/xfs_log_recover.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "5105426424ad6981db827cc1ada835a488fab035", "status": "affected", "version": "89cebc8477290b152618ffa110bbeae340d50900", "versionType": "git"}, {"lessThan": "226a3c8bea7163c39fe0a1c0ffc7ab7410ef3ba4", "status": "affected", "version": "89cebc8477290b152618ffa110bbeae340d50900", "versionType": "git"}, {"lessThan": "d0ae7ec3aa61db5140b107f0a63e017f63e56a96", "status": "affected", "version": "89cebc8477290b152618ffa110bbeae340d50900", "versionType": "git"}, {"lessThan": "d50b1fd066d66ceb548ba43e332cfe8a47e5e55a", "status": "affected", "version": "89cebc8477290b152618ffa110bbeae340d50900", "versionType": "git"}, {"lessThan": "d98f22d2e11e0a36493aeb25b2933571ee90d9a4", "status": "affected", "version": "89cebc8477290b152618ffa110bbeae340d50900", "versionType": "git"}, {"lessThan": "cccbabeb9a18fcb978d76d6047f2b59214aa7749", "status": "affected", "version": "89cebc8477290b152618ffa110bbeae340d50900", "versionType": "git"}, {"lessThan": "2094dab19d45c487285617b7b68913d0cc0c1211", "status": "affected", "version": "89cebc8477290b152618ffa110bbeae340d50900", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/xfs/xfs_log_recover.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.3"}, {"lessThan": "4.3", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.212", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.178", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.145", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.96", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.39", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "28E97AE0-962A-4211-AEDF-295D80859CF2", "versionEndExcluding": "5.15.212", "versionStartIncluding": "4.3", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "092233C7-F4E0-40C8-BD4D-A28FE50DFE20", "versionEndExcluding": "6.1.178", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "7046B092-F810-4440-ACE6-60218518EECE", "versionEndExcluding": "6.6.145", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "38A8100E-2B1A-462F-AEE9-8901B870FEF2", "versionEndExcluding": "6.12.96", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "914AE4BC-3D59-4C5A-9DB5-9CE327B429F7", "versionEndExcluding": "6.18.39", "versionStartIncluding": "6.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "6228DDD6-4557-4AA3-9F43-AB995D471E42", "versionEndExcluding": "7.1.4", "versionStartIncluding": "6.19", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.2:rc1:*:*:*:*:*:*", "matchCriteriaId": "5E8B9085-7ADB-4A05-89EF-12949B6A0509", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.2:rc2:*:*:*:*:*:*", "matchCriteriaId": "1FC0D50D-9D58-4947-A197-A5A3FF07E7E3", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.2:rc3:*:*:*:*:*:*", "matchCriteriaId": "D6ECA620-8606-4230-A87D-3FF3EFE12592", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfs: fail recovery on a committed log item with no regions\n\nIf the first op of a transaction is a bare transaction header\n(len == sizeof(struct xfs_trans_header)), xlog_recover_add_to_trans()\nadds an item but no region, leaving it on r_itemq with ri_cnt == 0 and\nri_buf == NULL.\n\nThe header can be split across op records, so later ops may still add\nregions; the item is only invalid if the transaction commits with none.\nThe runtime commit path never emits such a transaction, so this only\nhappens on a crafted log. It came from an AI-assisted code audit of the\nrecovery parser.\n\nxlog_recover_reorder_trans() calls ITEM_TYPE() on the item, which reads\n*(unsigned short *)item->ri_buf[0].iov_base and faults on the NULL\nri_buf. Reject it there, before the commit handlers that also read\nri_buf[0].\n\n KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\n RIP: 0010:xlog_recover_reorder_trans (fs/xfs/xfs_log_recover.c:1836)\n xlog_recover_commit_trans (fs/xfs/xfs_log_recover.c:2043)\n xlog_recover_process_data (fs/xfs/xfs_log_recover.c:2501)\n xlog_do_recovery_pass (fs/xfs/xfs_log_recover.c:3244)\n xlog_recover (fs/xfs/xfs_log_recover.c:3493)\n xfs_log_mount (fs/xfs/xfs_log.c:618)\n xfs_mountfs (fs/xfs/xfs_mount.c:1034)\n xfs_fs_fill_super (fs/xfs/xfs_super.c:1938)\n vfs_get_tree (fs/super.c:1695)\n path_mount (fs/namespace.c:4161)\n __x64_sys_mount (fs/namespace.c:4367)"}], "id": "CVE-2026-64187", "lastModified": "2026-11-06T17:18:40.190", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-64187", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-06T16:31:54.393338Z", "version": "2.0.3"}}]}, "published": "2026-07-20T17:18:21.743", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2094dab19d45c487285617b7b68913d0cc0c1211"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/226a3c8bea7163c39fe0a1c0ffc7ab7410ef3ba4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5105426424ad6981db827cc1ada835a488fab035"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cccbabeb9a18fcb978d76d6047f2b59214aa7749"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d0ae7ec3aa61db5140b107f0a63e017f63e56a96"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d50b1fd066d66ceb548ba43e332cfe8a47e5e55a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d98f22d2e11e0a36493aeb25b2933571ee90d9a4"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: xfs: fail recovery on a committed log item with no regions", "id": "2502891", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502891"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["A flaw was found in the Linux kernel's XFS filesystem log recovery component. A local attacker could exploit this vulnerability by crafting a malicious XFS log. When the system attempts to recover from this log, it triggers a null-pointer dereference, which can lead to a system crash. This results in a Denial of Service (DoS), making the system unavailable."], "name": "CVE-2026-64187", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-07-20T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64187\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64187\nhttps://lore.kernel.org/linux-cve-announce/2026072049-CVE-2026-64187-5cb5@gregkh/T"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[89cebc8477290b152618ffa110bbeae340d50900,d50b1fd066d66ceb548ba43e332cfe8a47e5e55a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[89cebc8477290b152618ffa110bbeae340d50900,d98f22d2e11e0a36493aeb25b2933571ee90d9a4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[89cebc8477290b152618ffa110bbeae340d50900,cccbabeb9a18fcb978d76d6047f2b59214aa7749)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[89cebc8477290b152618ffa110bbeae340d50900,2094dab19d45c487285617b7b68913d0cc0c1211)"}}], "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": "semver", "value": "4.3"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,4.3)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.96,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.39,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.4,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2-rc4,*]"}}], "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": "2026-07-21T01:00:04.320988+00:00", "updated": "2026-07-30T19:15:04.762982+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}