CVE-2026-53129

Kernel memory corruption via uncanceled shrink work

Published Jun 24, 2026 · Updated Jun 24, 2026

Use-after-free in Linux Kernel 4.6 and later allows local users with CAP_SYS_ADMIN to corrupt memory during filesystem teardown. mb_cache_destroy() frees the cache without synchronously canceling c_shrink_work, so mb_cache_shrink_worker() can access freed cache memory. Root or CAP_SYS_ADMIN access and the last put of a mounted ext2, ext4, or ocfs2 filesystem are required; no demonstrated crash or privilege gain is documented.

CVSS severity7.8
High
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Use-after-free in Linux Kernel 4.6 and later allows local users with CAP_SYS_ADMIN to corrupt memory during filesystem teardown. mb_cache_destroy() frees the cache without synchronously canceling c_shrink_work, so mb_cache_shrink_worker() can access freed cache memory. Root or CAP_SYS_ADMIN access and the last put of a mounted ext2, ext4, or ocfs2 filesystem are required; no demonstrated crash or privilege gain is documented.

The record

CVE
CVE-2026-53129
Published
Jun 24, 2026
Updated
Jun 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jun 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.6
  2. Affected versionversion=c2f3140fe2eceb3a6c1615b2648b9471544881c6 <0e4eff315d799f5842b95872199b0f0fb8ef5f51
  3. Affected versionversion=c2f3140fe2eceb3a6c1615b2648b9471544881c6 <a88d39a74a208e197c03bffaa2df34de732af19f
  4. Affected versionversion=c2f3140fe2eceb3a6c1615b2648b9471544881c6 <b25fd3523bef88fb7ffd4c5b63bbe9c08f73bb4c
  5. Affected versionversion=c2f3140fe2eceb3a6c1615b2648b9471544881c6 <d227786ab1119669df4dc333a61510c52047cce4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linux Kernelversion=4.6; version=c2f3140fe2eceb3a6c1615b2648b9471544881c6 <0e4eff315d799f5842b95872199b0f0fb8ef5f51; version=c2f3140fe2eceb3a6c1615b2648b9471544881c6 <a88d39a74a208e197c03bffaa2df34de732af19f; version=c2f3140fe2eceb3a6c1615b2648b9471544881c6 <b25fd3523bef88fb7ffd4c5b63bbe9c08f73bb4c; version=c2f3140fe2eceb3a6c1615b2648b9471544881c6 <d227786ab1119669df4dc333a61510c52047cce4

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo