Race condition in Linux kernel - CVE-2026-90212
Published: September 19, 2026
Vulnerability identifier: #VU151270
CSH Severity: Low
CVSS v4: 5.6 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90212
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local privileged user to cause a denial of service.
The vulnerability exists due to improper handling of voluntary preemption in the arm64 EFI runtime-service handling code when invoking EFI runtime services. A local privileged user can invoke EFI runtime services to cause a denial of service.
The affected configuration requires arm64 software PAN and EFI runtime service support.
Affected software
Linux kernel
How to mitigate CVE-2026-90212
Install security update from vendor's repository.