CVE-2026-64187xfs: fail recovery on a committed log item with no regions
- 5.5MediumCVSS base score
- 0.11%Exploitation in 30 daysEPSS · top 98% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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)
Timeline
ID reserved
By Linux
- 1 day later
· 1 day later
Published
- 4 months later
· 4 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.11% · top 98% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 89cebc8477290b152618ffa110bbeae340d50900 – < 5105426424ad6981db827cc1ada835a488fab035
- affected 89cebc8477290b152618ffa110bbeae340d50900 – < 226a3c8bea7163c39fe0a1c0ffc7ab7410ef3ba4
- affected 89cebc8477290b152618ffa110bbeae340d50900 – < d0ae7ec3aa61db5140b107f0a63e017f63e56a96
- affected 89cebc8477290b152618ffa110bbeae340d50900 – < d50b1fd066d66ceb548ba43e332cfe8a47e5e55a
- affected 89cebc8477290b152618ffa110bbeae340d50900 – < d98f22d2e11e0a36493aeb25b2933571ee90d9a4
- affected 89cebc8477290b152618ffa110bbeae340d50900 – < cccbabeb9a18fcb978d76d6047f2b59214aa7749
- affected 89cebc8477290b152618ffa110bbeae340d50900 – < 2094dab19d45c487285617b7b68913d0cc0c1211
- affected 4.3
- unaffected < 4.3
- unaffected 5.15.212 – ≤ 5.15.*
- unaffected 6.1.178 – ≤ 6.1.*
- unaffected 6.6.145 – ≤ 6.6.*
- unaffected 6.12.96 – ≤ 6.12.*
- unaffected 6.18.39 – ≤ 6.18.*
- unaffected 7.1.4 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References7
- https://git.kernel.org/stable/c/5105426424ad6981db827cc1ada835a488fab035 (opens in a new tab)
- https://git.kernel.org/stable/c/226a3c8bea7163c39fe0a1c0ffc7ab7410ef3ba4 (opens in a new tab)
- https://git.kernel.org/stable/c/d0ae7ec3aa61db5140b107f0a63e017f63e56a96 (opens in a new tab)
- https://git.kernel.org/stable/c/d50b1fd066d66ceb548ba43e332cfe8a47e5e55a (opens in a new tab)
- https://git.kernel.org/stable/c/d98f22d2e11e0a36493aeb25b2933571ee90d9a4 (opens in a new tab)
- https://git.kernel.org/stable/c/cccbabeb9a18fcb978d76d6047f2b59214aa7749 (opens in a new tab)
- https://git.kernel.org/stable/c/2094dab19d45c487285617b7b68913d0cc0c1211 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-46007 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-64187)Record last updated .