🛡️ CVE-2025-40228 — kernel

⚪ Unknown ✅ No Known Exploit NVD
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

mm/damon/sysfs: catch commit test ctx alloc failure

In the Linux kernel, the following vulnerability has been resolved:

mm/damon/sysfs: catch commit test ctx alloc failure

Patch series "mm/damon/sysfs: fix commit test damon_ctx [de]allocation".

DAMON sysfs interface dynamically allocates and uses a damon_ctx object

for testing if given inputs for online DAMON parameters update is valid.

The object is being used without an allocation failure check, and leaked

when the test succeeds. Fix the two bugs.

This patch (of 2):

The damon_ctx for testing online DAMON parameters commit inputs is used

without its allocation failure check. This could result in an invalid

memory access. Fix it by directly returning an error when the allocation

failed.

Affected software

CVE-2025-40228 is recorded against 2 packages.

  • kernel (from 6.15.0 up to 6.17.6)
  • unknown

Timeline and source

Published on 4 December 2025 and last revised on 15 July 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

git.kernel.org (Web)
git.kernel.org (Web)
github.com (Advisory)
nvd.nist.gov (Advisory)
git.kernel.org (Package)

CVE-2025-40228 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity Unknown
CVSS Score N/A
CVSS Vector N/A
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2025-12-04
Updated 2026-08-12
Modified 2026-07-15
Fix URL N/A

Affected Packages

Software From version Fixed in
kernel 6.15.0 6.17.6
unknown — —

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