CVE-2023-52976

kernel: efi: fix potential NULL deref in efi_mem_reserve_persistent

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Severity

Low

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · March 27, 2025

Updated · June 30, 2026

Description

A flaw was found in the EFI module in the Linux kernel. A NULL pointer dereference can be triggered due to a missing check of the return value of the memremap function, causing a crash and resulting in a denial of service.

Statement

This issue has been fixed in Red Hat Enterprise Linux 9.4 via RHSA-2024:2394 [1].

[1]. https://access.redhat.com/errata/RHSA-2024:2394

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 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-476 · NULL Pointer Dereference