SB20260507220 - NULL pointer dereference in Linux kernel pstore

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Main Vulnerability Database SB20260507220

SB20260507220 - NULL pointer dereference in Linux kernel pstore

Published: May 7, 2026

Security Bulletin ID SB20260507220
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) NULL pointer dereference (CVE-ID: CVE-2026-43124)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: 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


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper handling of a NULL return value in persistent_ram_vmap() when mapping the persistent ram buffer. A local user can trigger the vulnerable code path to cause a denial of service.

The issue occurs when a failed vmap() call is treated as a successful mapping because a non-zero offset produces a non-NULL pointer, which can later lead to dereference of an invalid address.


Remediation

Install update from vendor's website.

References