CVE-2023-52976

MEDIUM EPSS 18.2%
Published Mar 27, 20251y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Mar 27, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: efi: fix potential NULL deref in efi_mem_reserve_persistent When iterating on a linked list, a result of memremap is dereferenced without checking it for NULL. This patch adds a check that falls back on allocating a new page in case memremap doesn't succeed. Found by Linux Verification Center (linuxtesting.org) with SVACE. [ardb: return -ENOMEM instead of breaking out of the loop]

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
18.2% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 10

VendorProductVersionRange
linuxlinux_kernel*≥5.1.16  –  <5.4.232
linuxlinux_kernel*≥5.5  –  <5.10.168
linuxlinux_kernel*≥5.11  –  <5.15.93
linuxlinux_kernel*≥5.16  –  <6.1.11
linuxlinux_kernel6.2any
linuxlinux_kernel6.2any
linuxlinux_kernel6.2any
linuxlinux_kernel6.2any
linuxlinux_kernel6.2any
linuxlinux_kernel6.2any

References 5

  • git.kernel.org https://git.kernel.org/stable/c/87d4ff18738fd71e7e3c10827c80257da6283697
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/966d47e1f27c45507c5df82b2a2157e5a4fd3909
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a2e6a9ff89f13666a1c3ff7195612ab949ea9afc
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d8fc0b5fb3e816a4a8684bcd3ed02cbef0fce23c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d92a25627bcdf264183670da73c9a60c0bac327e
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/87d4ff18738fd71e7e3c10827c80257da6283697
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/966d47e1f27c45507c5df82b2a2157e5a4fd3909
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a2e6a9ff89f13666a1c3ff7195612ab949ea9afc
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d8fc0b5fb3e816a4a8684bcd3ed02cbef0fce23c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d92a25627bcdf264183670da73c9a60c0bac327e
    Patch