SB20260625145 - NULL pointer dereference in Linux kernel unix

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Main Vulnerability Database SB20260625145

SB20260625145 - NULL pointer dereference in Linux kernel unix

Published: June 25, 2026

Security Bulletin ID SB20260625145
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-2026-53034)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/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 unix_stream_bpf_update_proto() when updating a sockmap for an af_unix stream socket during a concurrent connect operation. A local user can trigger a race condition via a bpf sockmap update to cause a denial of service.

The issue occurs in a race window where the socket state is set to established before the peer pointer is assigned.


Remediation

Install update from vendor's website.

References