5.5
MEDIUM
CVSS 3.1
CVE-2026-64187
xfs: fail recovery on a committed log item with no regions
Overview
Description
In the Linux kernel, the following vulnerability has been resolved: xfs: fail recovery on a committed log item with no regions If the first op of a transaction is a bare transaction header (len == sizeof(struct xfs_trans_header)), xlog_recover_add_to_trans() adds an item but no region, leaving it on r_itemq with ri_cnt == 0 and ri_buf == NULL. The header can be split across op records, so later ops may still add regions; the item is only invalid if the transaction commits with none. The runtime commit path never emits such a transaction, so this only happens on a crafted log. It came from an AI-assisted code audit of the recovery parser. xlog_recover_reorder_trans() calls ITEM_TYPE() on the item, which reads *(unsigned short *)item->ri_buf[0].iov_base and faults on the NULL ri_buf. Reject it there, before the commit handlers that also read ri_buf[0]. KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] RIP: 0010:xlog_recover_reorder_trans (fs/xfs/xfs_log_recover.c:1836) xlog_recover_commit_trans (fs/xfs/xfs_log_recover.c:2043) xlog_recover_process_data (fs/xfs/xfs_log_recover.c:2501) xlog_do_recovery_pass (fs/xfs/xfs_log_recover.c:3244) xlog_recover (fs/xfs/xfs_log_recover.c:3493) xfs_log_mount (fs/xfs/xfs_log.c:618) xfs_mountfs (fs/xfs/xfs_mount.c:1034) xfs_fs_fill_super (fs/xfs/xfs_super.c:1938) vfs_get_tree (fs/super.c:1695) path_mount (fs/namespace.c:4161) __x64_sys_mount (fs/namespace.c:4367)
Details
INFO
Published Date :
July 20, 2026, 5:18 p.m.
Last Modified :
Aug. 17, 2026, 5:17 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework
for assessing the severity of vulnerabilities in software and systems.
We collect and displays CVSS scores from various sources for each CVE.
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
Apply provided Linux kernel patches to fix null pointer dereference during XFS log recovery.
- Update the Linux kernel to a patched version.
- Apply specific XFS patches for log recovery.
- Ensure XFS filesystem recovery is robust.
- Reboot the system after applying updates.
References
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-64187.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-64187 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-64187
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-64187 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-64187 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '89cebc8477290b152618ffa110bbeae340d50900', 'lessThan': '5105426424ad6981db827cc1ada835a488fab035', 'versionType': 'git'}, {'status': 'affected', 'version': '89cebc8477290b152618ffa110bbeae340d50900', 'lessThan': '226a3c8bea7163c39fe0a1c0ffc7ab7410ef3ba4', 'versionType': 'git'}, {'status': 'affected', 'version': '89cebc8477290b152618ffa110bbeae340d50900', 'lessThan': 'd0ae7ec3aa61db5140b107f0a63e017f63e56a96', 'versionType': 'git'}, {'status': 'affected', 'version': '89cebc8477290b152618ffa110bbeae340d50900', 'lessThan': 'd50b1fd066d66ceb548ba43e332cfe8a47e5e55a', 'versionType': 'git'}, {'status': 'affected', 'version': '89cebc8477290b152618ffa110bbeae340d50900', 'lessThan': 'd98f22d2e11e0a36493aeb25b2933571ee90d9a4', 'versionType': 'git'}, {'status': 'affected', 'version': '89cebc8477290b152618ffa110bbeae340d50900', 'lessThan': 'cccbabeb9a18fcb978d76d6047f2b59214aa7749', 'versionType': 'git'}, {'status': 'affected', 'version': '89cebc8477290b152618ffa110bbeae340d50900', 'lessThan': '2094dab19d45c487285617b7b68913d0cc0c1211', 'versionType': 'git'}], 'programFiles': ['fs/xfs/xfs_log_recover.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.3'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.3', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc4', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/xfs/xfs_log_recover.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '89cebc8477290b152618ffa110bbeae340d50900', 'lessThan': '5105426424ad6981db827cc1ada835a488fab035', 'versionType': 'git'}, {'status': 'affected', 'version': '89cebc8477290b152618ffa110bbeae340d50900', 'lessThan': '226a3c8bea7163c39fe0a1c0ffc7ab7410ef3ba4', 'versionType': 'git'}, {'status': 'affected', 'version': '89cebc8477290b152618ffa110bbeae340d50900', 'lessThan': 'd0ae7ec3aa61db5140b107f0a63e017f63e56a96', 'versionType': 'git'}, {'status': 'affected', 'version': '89cebc8477290b152618ffa110bbeae340d50900', 'lessThan': 'd50b1fd066d66ceb548ba43e332cfe8a47e5e55a', 'versionType': 'git'}, {'status': 'affected', 'version': '89cebc8477290b152618ffa110bbeae340d50900', 'lessThan': 'd98f22d2e11e0a36493aeb25b2933571ee90d9a4', 'versionType': 'git'}, {'status': 'affected', 'version': '89cebc8477290b152618ffa110bbeae340d50900', 'lessThan': 'cccbabeb9a18fcb978d76d6047f2b59214aa7749', 'versionType': 'git'}, {'status': 'affected', 'version': '89cebc8477290b152618ffa110bbeae340d50900', 'lessThan': '2094dab19d45c487285617b7b68913d0cc0c1211', 'versionType': 'git'}], 'programFiles': ['fs/xfs/xfs_log_recover.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.3'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.3', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/xfs/xfs_log_recover.c'], 'defaultStatus': 'affected'}] -
Initial Analysis by [email protected]
Aug. 11, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-476 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.178 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.145 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.96 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.39 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.3 up to (excluding) 5.15.212 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.1.4 *cpe:2.3:o:linux:linux_kernel:7.2:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.2:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.2:rc3:*:*:*:*:*:* Added Reference Type kernel.org: https://git.kernel.org/stable/c/2094dab19d45c487285617b7b68913d0cc0c1211 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/226a3c8bea7163c39fe0a1c0ffc7ab7410ef3ba4 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/5105426424ad6981db827cc1ada835a488fab035 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/cccbabeb9a18fcb978d76d6047f2b59214aa7749 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/d0ae7ec3aa61db5140b107f0a63e017f63e56a96 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/d50b1fd066d66ceb548ba43e332cfe8a47e5e55a Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/d98f22d2e11e0a36493aeb25b2933571ee90d9a4 Types: Patch -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 24, 2026
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/226a3c8bea7163c39fe0a1c0ffc7ab7410ef3ba4 Added Reference https://git.kernel.org/stable/c/5105426424ad6981db827cc1ada835a488fab035 Added Reference https://git.kernel.org/stable/c/d0ae7ec3aa61db5140b107f0a63e017f63e56a96 Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '89cebc8477290b152618ffa110bbeae340d50900', 'lessThan': 'd50b1fd066d66ceb548ba43e332cfe8a47e5e55a', 'versionType': 'git'}, {'status': 'affected', 'version': '89cebc8477290b152618ffa110bbeae340d50900', 'lessThan': 'd98f22d2e11e0a36493aeb25b2933571ee90d9a4', 'versionType': 'git'}, {'status': 'affected', 'version': '89cebc8477290b152618ffa110bbeae340d50900', 'lessThan': 'cccbabeb9a18fcb978d76d6047f2b59214aa7749', 'versionType': 'git'}, {'status': 'affected', 'version': '89cebc8477290b152618ffa110bbeae340d50900', 'lessThan': '2094dab19d45c487285617b7b68913d0cc0c1211', 'versionType': 'git'}], 'programFiles': ['fs/xfs/xfs_log_recover.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.3'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.3', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc4', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/xfs/xfs_log_recover.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '89cebc8477290b152618ffa110bbeae340d50900', 'lessThan': '5105426424ad6981db827cc1ada835a488fab035', 'versionType': 'git'}, {'status': 'affected', 'version': '89cebc8477290b152618ffa110bbeae340d50900', 'lessThan': '226a3c8bea7163c39fe0a1c0ffc7ab7410ef3ba4', 'versionType': 'git'}, {'status': 'affected', 'version': '89cebc8477290b152618ffa110bbeae340d50900', 'lessThan': 'd0ae7ec3aa61db5140b107f0a63e017f63e56a96', 'versionType': 'git'}, {'status': 'affected', 'version': '89cebc8477290b152618ffa110bbeae340d50900', 'lessThan': 'd50b1fd066d66ceb548ba43e332cfe8a47e5e55a', 'versionType': 'git'}, {'status': 'affected', 'version': '89cebc8477290b152618ffa110bbeae340d50900', 'lessThan': 'd98f22d2e11e0a36493aeb25b2933571ee90d9a4', 'versionType': 'git'}, {'status': 'affected', 'version': '89cebc8477290b152618ffa110bbeae340d50900', 'lessThan': 'cccbabeb9a18fcb978d76d6047f2b59214aa7749', 'versionType': 'git'}, {'status': 'affected', 'version': '89cebc8477290b152618ffa110bbeae340d50900', 'lessThan': '2094dab19d45c487285617b7b68913d0cc0c1211', 'versionType': 'git'}], 'programFiles': ['fs/xfs/xfs_log_recover.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.3'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.3', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc4', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/xfs/xfs_log_recover.c'], 'defaultStatus': 'affected'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 20, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '89cebc8477290b152618ffa110bbeae340d50900', 'lessThan': 'd50b1fd066d66ceb548ba43e332cfe8a47e5e55a', 'versionType': 'git'}, {'status': 'affected', 'version': '89cebc8477290b152618ffa110bbeae340d50900', 'lessThan': 'd98f22d2e11e0a36493aeb25b2933571ee90d9a4', 'versionType': 'git'}, {'status': 'affected', 'version': '89cebc8477290b152618ffa110bbeae340d50900', 'lessThan': 'cccbabeb9a18fcb978d76d6047f2b59214aa7749', 'versionType': 'git'}, {'status': 'affected', 'version': '89cebc8477290b152618ffa110bbeae340d50900', 'lessThan': '2094dab19d45c487285617b7b68913d0cc0c1211', 'versionType': 'git'}], 'programFiles': ['fs/xfs/xfs_log_recover.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.3'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.3', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc4', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/xfs/xfs_log_recover.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: xfs: fail recovery on a committed log item with no regions If the first op of a transaction is a bare transaction header (len == sizeof(struct xfs_trans_header)), xlog_recover_add_to_trans() adds an item but no region, leaving it on r_itemq with ri_cnt == 0 and ri_buf == NULL. The header can be split across op records, so later ops may still add regions; the item is only invalid if the transaction commits with none. The runtime commit path never emits such a transaction, so this only happens on a crafted log. It came from an AI-assisted code audit of the recovery parser. xlog_recover_reorder_trans() calls ITEM_TYPE() on the item, which reads *(unsigned short *)item->ri_buf[0].iov_base and faults on the NULL ri_buf. Reject it there, before the commit handlers that also read ri_buf[0]. KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] RIP: 0010:xlog_recover_reorder_trans (fs/xfs/xfs_log_recover.c:1836) xlog_recover_commit_trans (fs/xfs/xfs_log_recover.c:2043) xlog_recover_process_data (fs/xfs/xfs_log_recover.c:2501) xlog_do_recovery_pass (fs/xfs/xfs_log_recover.c:3244) xlog_recover (fs/xfs/xfs_log_recover.c:3493) xfs_log_mount (fs/xfs/xfs_log.c:618) xfs_mountfs (fs/xfs/xfs_mount.c:1034) xfs_fs_fill_super (fs/xfs/xfs_super.c:1938) vfs_get_tree (fs/super.c:1695) path_mount (fs/namespace.c:4161) __x64_sys_mount (fs/namespace.c:4367) Added Reference https://git.kernel.org/stable/c/2094dab19d45c487285617b7b68913d0cc0c1211 Added Reference https://git.kernel.org/stable/c/cccbabeb9a18fcb978d76d6047f2b59214aa7749 Added Reference https://git.kernel.org/stable/c/d50b1fd066d66ceb548ba43e332cfe8a47e5e55a Added Reference https://git.kernel.org/stable/c/d98f22d2e11e0a36493aeb25b2933571ee90d9a4
EPSS is a daily estimate of the probability of exploitation activity
being observed over the next 30 days. Following chart shows the EPSS
score history of the vulnerability.