CVE-2025-40229 mm/damon/core: fix potential memory leak by cleaning ops_filter in damon_destroy_scheme
A memory leak in the Linux kernel DAMON subsystem can lead to resource exhaustion and denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Not stated
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-40229?
CVE-2025-40229 is a memory corruption vulnerability in Linux, published on 4 Dec 2025.
Official description
In the Linux kernel, the following vulnerability has been resolved:
mm/damon/core: fix potential memory leak by cleaning ops_filter in damon_destroy_scheme
Currently, damon_destroy_scheme() only cleans up the filter list but leaves ops_filter untouched, which could lead to memory leaks when a scheme is destroyed.
This patch ensures both filter and ops_filter are properly freed in damon_destroy_scheme(), preventing potential memory leaks.
Which versions are affected by CVE-2025-40229?
How do I fix CVE-2025-40229?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-40229 being exploited?
There is no known exploitation of CVE-2025-40229 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2025-40229, DEBIAN-CVE-2025-40229, GHSA-23h8-7x35-v9v9, UBUNTU-CVE-2025-40229.