# CVE-2025-40227: linux: In the Linux kernel, the following vulnerability has been resolved:  mm/damon/sysfs: dealloc commit test ctx always...

CVE-2025-40227 is fixed in linux on 1 platform by DEBIAN-CVE-2025-40227 (version 6.17.6-1), released December 4, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2025-40227
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0020
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 4, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  mm/damon/sysfs: dealloc commit test ctx always  The damon_ctx for testing online DAMON parameters commit inputs is deallocated only when the test fails.  This means memory is leaked for every successful online DAMON parameters commit.  Fix the leak by always deallocating it.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 6.17.6-1 | [DEBIAN-CVE-2025-40227](https://patchblox.com/security/data/fix/linux/debian-cve-2025-40227.md) | Dec 4, 2025 |

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