Race condition in Linux kernel - CVE-2026-80858
Published: September 5, 2026
Vulnerability identifier: #VU147066
CSH Severity: Low
CVSS v4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-80858
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 improper synchronization in the FUSE io-uring queue publication logic when concurrently accessing an io-uring queue during its creation. A local user can race queue creation with lockless queue access to cause a denial of service.
Affected software
Linux kernel
How to mitigate CVE-2026-80858
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3