Race condition in Linux kernel - CVE-2026-31551
Published: April 25, 2026
Vulnerability identifier: #VU127843
CSH Severity: Low
CVSS v4.0: 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
CVE-ID: CVE-2026-31551
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a race condition in aql_enable_write in the mac80211 debugfs interface when handling concurrent write operations to debugfs. A local user can perform concurrent writes to the aql control file to cause a denial of service.
How to mitigate CVE-2026-31551
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/256f7d4c11235d0569f78413c41dc89d2dc1557c
- https://git.kernel.org/stable/c/29a1a350afcd28a2150bd73b8bd83eac3480f13e
- https://git.kernel.org/stable/c/5ba05436f15d16ae7ab04b880e8bf8d440be892b
- https://git.kernel.org/stable/c/787152497ac763deab16f6f4b7ce79aaeb3eb7e8
- https://git.kernel.org/stable/c/8bb90ff77326c34e75b573b1febdd9586fec5aba
- https://git.kernel.org/stable/c/b24763d32d5b4ada766deca4b42d6766272fef0c
- https://git.kernel.org/stable/c/b94ae8e0d5fe1bdbbfdc3854ff6ce98f6876a828