CVE-2026-53129fs/mbcache: cancel shrink work before destroying the cache
- 7.8HighCVSS base score
- 0.12%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: fs/mbcache: cancel shrink work before destroying the cache mb_cache_destroy() calls shrinker_free() and then frees all cache entries and the cache itself, but it does not cancel the pending c_shrink_work work item first. If mb_cache_entry_create() schedules c_shrink_work via schedule_work() and the work item is still pending or running when mb_cache_destroy() runs, mb_cache_shrink_worker() will access the cache after its memory has been freed, causing a use-after-free. This is only reachable by a privileged user (root or CAP_SYS_ADMIN) who can trigger the last put of a mounted ext2/ext4/ocfs2 filesystem. Cancel the work item with cancel_work_sync() before calling shrinker_free(), ensuring the worker has finished and will not be rescheduled before the cache is torn down.
Timeline
ID reserved
By Linux
- 15 days later
· 15 days later
Published
- 5 months later
· 5 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 · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.12% · top 98% of all CVEs (12 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: High 7.8.
Affected products
- affected c2f3140fe2eceb3a6c1615b2648b9471544881c6 – < 40148c615687c1692712e50a6de53d62dfbfc20f
- affected c2f3140fe2eceb3a6c1615b2648b9471544881c6 – < cbdd6f0fb19a0ce8a013acd80ac87a62f57fa20d
- affected c2f3140fe2eceb3a6c1615b2648b9471544881c6 – < a88d39a74a208e197c03bffaa2df34de732af19f
- affected c2f3140fe2eceb3a6c1615b2648b9471544881c6 – < 0e4eff315d799f5842b95872199b0f0fb8ef5f51
- affected c2f3140fe2eceb3a6c1615b2648b9471544881c6 – < b25fd3523bef88fb7ffd4c5b63bbe9c08f73bb4c
- affected c2f3140fe2eceb3a6c1615b2648b9471544881c6 – < d227786ab1119669df4dc333a61510c52047cce4
- affected 4.6
- unaffected < 4.6
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.160 – ≤ 6.6.*
- unaffected 6.12.91 – ≤ 6.12.*
- unaffected 6.18.33 – ≤ 6.18.*
- unaffected 7.0.10 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References6
- https://git.kernel.org/stable/c/40148c615687c1692712e50a6de53d62dfbfc20f (opens in a new tab)
- https://git.kernel.org/stable/c/cbdd6f0fb19a0ce8a013acd80ac87a62f57fa20d (opens in a new tab)
- https://git.kernel.org/stable/c/a88d39a74a208e197c03bffaa2df34de732af19f (opens in a new tab)
- https://git.kernel.org/stable/c/0e4eff315d799f5842b95872199b0f0fb8ef5f51 (opens in a new tab)
- https://git.kernel.org/stable/c/b25fd3523bef88fb7ffd4c5b63bbe9c08f73bb4c (opens in a new tab)
- https://git.kernel.org/stable/c/d227786ab1119669df4dc333a61510c52047cce4 (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-2026-38997 (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-2026-53129)Record last updated .