{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-64187", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T07:54:57.040Z", "datePublished": "2026-07-20T16:27:46.653Z", "dateUpdated": "2026-08-17T04:51:48.578Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T04:51:48.578Z" }, "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)" } ], "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": "5105426424ad6981db827cc1ada835a488fab035", "status": "affected", "versionType": "git" }, { "version": "89cebc8477290b152618ffa110bbeae340d50900", "lessThan": "226a3c8bea7163c39fe0a1c0ffc7ab7410ef3ba4", "status": "affected", "versionType": "git" }, { "version": "89cebc8477290b152618ffa110bbeae340d50900", "lessThan": "d0ae7ec3aa61db5140b107f0a63e017f63e56a96", "status": "affected", "versionType": "git" }, { "version": "89cebc8477290b152618ffa110bbeae340d50900", "lessThan": "d50b1fd066d66ceb548ba43e332cfe8a47e5e55a", "status": "affected", "versionType": "git" }, { "version": "89cebc8477290b152618ffa110bbeae340d50900", "lessThan": "d98f22d2e11e0a36493aeb25b2933571ee90d9a4", "status": "affected", "versionType": "git" }, { "version": "89cebc8477290b152618ffa110bbeae340d50900", "lessThan": "cccbabeb9a18fcb978d76d6047f2b59214aa7749", "status": "affected", "versionType": "git" }, { "version": "89cebc8477290b152618ffa110bbeae340d50900", "lessThan": "2094dab19d45c487285617b7b68913d0cc0c1211", "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/xfs/xfs_log_recover.c" ], "versions": [ { "version": "4.3", "status": "affected" }, { "version": "0", "lessThan": "4.3", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.96", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.39", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.4", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2", "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": "4.3", "versionEndExcluding": "5.15.212" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "6.1.178" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "6.6.145" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "6.12.96" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "6.18.39" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "7.1.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "7.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/5105426424ad6981db827cc1ada835a488fab035" }, { "url": "https://git.kernel.org/stable/c/226a3c8bea7163c39fe0a1c0ffc7ab7410ef3ba4" }, { "url": "https://git.kernel.org/stable/c/d0ae7ec3aa61db5140b107f0a63e017f63e56a96" }, { "url": "https://git.kernel.org/stable/c/d50b1fd066d66ceb548ba43e332cfe8a47e5e55a" }, { "url": "https://git.kernel.org/stable/c/d98f22d2e11e0a36493aeb25b2933571ee90d9a4" }, { "url": "https://git.kernel.org/stable/c/cccbabeb9a18fcb978d76d6047f2b59214aa7749" }, { "url": "https://git.kernel.org/stable/c/2094dab19d45c487285617b7b68913d0cc0c1211" } ], "title": "xfs: fail recovery on a committed log item with no regions", "x_generator": { "engine": "bippy-1.2.0" } } } }