CVE-2026-23352
kernel: x86/efi: defer freeing of boot services memory
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · March 25, 2026
Updated · June 28, 2026
Description
A flaw was found in the Linux kernel. During system startup, when the kernel attempts to free memory used by EFI (Extensible Firmware Interface) boot services, it may fail to properly release these memory regions. This occurs because the memory freeing process is initiated before the system's memory map is fully initialized. The consequence is a memory leak, which can lead to a denial of service by consuming available system resources.
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 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-763 · Release of Invalid Pointer or Reference