SB20260528109 - NULL pointer dereference in Linux kernel apparmor

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Main Vulnerability Database SB20260528109

SB20260528109 - NULL pointer dereference in Linux kernel apparmor

Published: May 28, 2026

Security Bulletin ID SB20260528109
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-2026-45965)

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 a NULL pointer dereference in rawdata_get_link_base in apparmorfs when resolving symbolic links to rawdata for a replaced profile after the export_binary parameter has been disabled at runtime. A local user can read a crafted rawdata symbolic link to cause a denial of service.

The issue occurs for profiles loaded before export_binary was disabled and then replaced, leaving the rawdata pointer NULL while the symbolic link remains accessible.


Remediation

Install update from vendor's website.

References