Improper locking in Linux kernel - CVE-2026-46035
Published: May 28, 2026
Vulnerability identifier: #VU132458
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2026-46035
CWE-ID: CWE-667
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local attacker to cause a denial of service.
The vulnerability exists due to improper lock handling in alloc_frozen_pages_nolock() when it is invoked from nmi context on uniprocessor kernels. A local attacker can trigger re-entry into rmqueue() to corrupt the freelists and cause a denial of service.
Only uniprocessor kernels are affected, and the issue is triggered when the function is called from nmi context.
How to mitigate CVE-2026-46035
Install security update from vendor's repository.