VulnerabilityPublished 24 Jun 2026Updated 21 Oct 2026

CVE-2026-53129: Linux kernel · fs/mbcache: cancel shrink work before destroying the cache

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in d227786ab1119669df4dc333a61510c52047cce4 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 12:55 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS: 0.1% chance of exploitation in 30 days – higher than 1% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in d227786ab1119669df4dc333a61510c52047cce4, cbdd6f0fb19a0ce8a013acd80ac87a62f57fa20d, b25fd3523bef88fb7ffd4c5b63bbe9c08f73bb4c +2

Exploitation evidence

Disclosed: evidence found.
CVE published 24 Jun 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ c2f3140fe2eceb3a6c1615b2648b9471544881c6, < d227786ab1119669df4dc333a61510c52047cce4	Fixed in d227786ab1119669df4dc333a61510c52047cce4
LinuxLinux	Affected ≥ c2f3140fe2eceb3a6c1615b2648b9471544881c6, < cbdd6f0fb19a0ce8a013acd80ac87a62f57fa20d	Fixed in cbdd6f0fb19a0ce8a013acd80ac87a62f57fa20d
LinuxLinux	Affected ≥ c2f3140fe2eceb3a6c1615b2648b9471544881c6, < b25fd3523bef88fb7ffd4c5b63bbe9c08f73bb4c	Fixed in b25fd3523bef88fb7ffd4c5b63bbe9c08f73bb4c
LinuxLinux	Affected ≥ c2f3140fe2eceb3a6c1615b2648b9471544881c6, < a88d39a74a208e197c03bffaa2df34de732af19f	Fixed in a88d39a74a208e197c03bffaa2df34de732af19f
LinuxLinux	Affected ≥ c2f3140fe2eceb3a6c1615b2648b9471544881c6, < 0e4eff315d799f5842b95872199b0f0fb8ef5f51	Fixed in 0e4eff315d799f5842b95872199b0f0fb8ef5f51
LinuxLinux	Affected =4.6	Fixed in–

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.

References

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