SB2026042547 - Improper locking in Linux kernel input misc driver
Published: April 25, 2026
Security Bulletin ID
SB2026042547
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper locking (CVE-ID: CVE-2026-31667)
CWE-ID: CWE-667 - Improper Locking
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 improper lock management in the uinput force-feedback handling path when processing force-feedback operations and device lifecycle events. A local user can trigger a circular locking dependency to cause a denial of service.
The issue can be triggered when using a force-feedback gamepad with uinput.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/1534661043c434b81cfde26b97a2fb2460329cf0
- https://git.kernel.org/stable/c/1e09dfbb4f5d20ee111f92325a00f85778a5f328
- https://git.kernel.org/stable/c/271ee71a1917b89f6d73ec82dd091c33d92ee617
- https://git.kernel.org/stable/c/4cda78d6f8bf2b700529f2fbccb994c3e826d7c2
- https://git.kernel.org/stable/c/546c18a14924eb521fe168d916d7ce28f1e13c1d
- https://git.kernel.org/stable/c/71a9729f412e2c692a35c542e14b706fb342927f
- https://git.kernel.org/stable/c/974f7b138c3a96dd5cd53d1b33409cd7b2229dc6
- https://git.kernel.org/stable/c/a3d6c9c053c9c605651508569230ead633b13f76