Race condition in Linux kernel - CVE-2026-74646
Published: August 24, 2026
Vulnerability identifier: #VU144903
CSH Severity: Low
CVSS v4: 6.8 [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]
CVE-ID: CVE-2026-74646
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a race condition in fastrpc_internal_invoke() when handling an interrupted invoke after wait_for_completion_interruptible() returns -ERESTARTSYS. A local user can trigger an interrupted invoke to cause a denial of service.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-74646
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux (Debian package) - update to 6.12.105-1
linux (Debian package) - update to 6.12.105-1
External References
- https://git.kernel.org/stable/c/3f265e405e5ef85030c3777262e18bb556bc8724
- https://git.kernel.org/stable/c/a902fe1f80f58a2335b6be1131866f827ec44d1a
- https://git.kernel.org/stable/c/af6345159abcbaa550518f31990d2a9558c2d369
- https://git.kernel.org/stable/c/b85a0e91d7d6cd06a53c881a46f749cfcef416a2
- https://git.kernel.org/stable/c/efd02f8d1a7449f15809bc18d3cd41aafea75d7e