Answer in brief
CVE-2026-53129 records a High severity (CVSS 7.8) vulnerability in fs/mbcache: cancel shrink work before destroying the cache. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=c2f3140fe2eceb3a6c1615b2648b9471544881c6 <cbdd6f0fb19a0ce8a013acd80ac87a62f57fa20d || >=c2f3140fe2eceb3a6c1615b2648b9471544881c6 <a88d39a74a208e197c03bffaa2df34de732af19f || >=c2f3140fe2eceb3a6c1615b2648b9471544881c6 <0e4eff315d799f5842b95872199b0f0fb8ef5f51 || >=c2f3140fe2eceb3a6c1615b2648b9471544881c6 <b25fd3523bef88fb7ffd4c5b63bbe9c08f73bb4c || >=c2f3140fe2eceb3a6c1615b2648b9471544881c6 <d227786ab1119669df4dc333a61510c52047cce4 | cbdd6f0fb19a0ce8a013acd80ac87a62f57fa20d, a88d39a74a208e197c03bffaa2df34de732af19f, 0e4eff315d799f5842b95872199b0f0fb8ef5f51, b25fd3523bef88fb7ffd4c5b63bbe9c08f73bb4c, d227786ab1119669df4dc333a61510c52047cce4 |
| Linux/Linuxgeneric | 4.6 | Not reported |
Published upstream
Jun 24, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 24, 2026
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.
Quoted source text, attributed separately from HOL analysis.