SB2026052871 - Race condition in Linux kernel damon

Description

This security bulletin contains information about 1 vulnerability.

1) Race condition (CVE-ID: CVE-2026-46008)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to a race condition in damos_walk() and kdamond_fn() when handling request registration during DAMON context termination. A local user can trigger concurrent request handling and context shutdown to cause a denial of service.

The issue can cause the caller thread to wait indefinitely because a newly registered request may never be handled or cancelled.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/0ba956a239ba6e3fae8555d3660e22e675be63b5
• https://git.kernel.org/stable/c/33c3f6c2b48cd84b441dba1ee3e62290e53930f4