Race condition in Linux kernel - CVE-2026-98109
Published: September 28, 2026
Vulnerability identifier: #VU152351
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-98109
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to trigger a kernel DEBUG_LOCKS warning.
The vulnerability exists due to a race condition in Bluetooth HCI device registration and Microsoft extension initialization when registering a Bluetooth device marked with an unconfigured-device quirk. A local user can trigger concurrent power-on work processing before the Microsoft extension mutex is initialized to trigger a kernel DEBUG_LOCKS warning.
Affected software
Linux kernel
How to mitigate CVE-2026-98109
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3