Race condition in Linux kernel - CVE-2026-80853
Published: September 5, 2026
Vulnerability identifier: #VU147061
CSH Severity: Low
CVSS v4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-80853
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 the KVM SEV debug encryption and decryption routines when processing encryption or decryption operations for SEV or SEV-ES guest memory on SNP-enabled hosts. A local user can trigger concurrent access to a temporary-buffer page to cause a denial of service.
Affected software
Linux kernel
How to mitigate CVE-2026-80853
Install security update from vendor's repository.