CVE-2026-53129

Last refreshed2026-10-23

Status: UPDATED | Advisory ID: CVE-2026-53129

Key Details

CVE	CVE-2026-53129
CVSS Score / Version	7.8 (High) / CVSS v3.1
Updated	2026-10-21
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is local; attack complexity is low; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	Linux Kernel
Classified as	CWE-416 (Use After Free)

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

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. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-53129
CVE	https://www.cve.org/CVERecord?id=CVE-2026-53129

Source

Reference

NVD

CVE