# CVE-2026-46183: linux: In the Linux kernel, the following vulnerability has been resolved:  mm/damon/sysfs-schemes: protect path kfree() wit...

CVE-2026-46183 is fixed in linux on 1 platform by DEBIAN-CVE-2026-46183 (version 7.0.7-1), released June 24, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-46183
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0012
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 28, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  mm/damon/sysfs-schemes: protect path kfree() with damon_sysfs_lock  damon_sysfs_quot_goal->path can be read and written by users, via DAMON sysfs 'path' file.  It can also be indirectly read, for the parameters {on,off}line committing to DAMON.  The reads for parameters committing are protected by damon_sysfs_lock to avoid the sysfs files being destroyed while any of the parameters are being read.  But the user-driven direct reads and writes are not protected by any lock, while the write is deallocating the path-pointing buffer.  As a result, the readers could read the already freed buffer (user-after-free).  Note that the user-reads don't race when the same open file is used by the writer, due to kernfs's open file locking.  Nonetheless, doing the reads and writes with separate open files would be common.  Fix it by protecting both the user-direct reads and writes with damon_sysfs_lock.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 7.0.7-1 | [DEBIAN-CVE-2026-46183](https://patchblox.com/security/data/fix/linux/debian-cve-2026-46183.md) | Jun 24, 2026 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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