CVE-2026-46035
kernel: mm/page_alloc: return NULL early from alloc_frozen_pages_nolock() in NMI on UP
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · May 27, 2026
Updated · June 28, 2026
Description
A flaw was found in the Linux kernel's memory management subsystem. On uniprocessor (UP) kernels, a Non-Maskable Interrupt (NMI) can cause the alloc_frozen_pages_nolock() function to re-enter rmqueue() and acquire a zone lock that is already held by an interrupted process. This can lead to corruption of the kernel's freelists, potentially causing system instability or a denial of service.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 7CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-413 · Improper Resource Locking