SB20260815335 - NULL pointer dereference in Linux kernel ipv6

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB20260815335

SB20260815335 - NULL pointer dereference in Linux kernel ipv6

Published: August 15, 2026

Security Bulletin ID SB20260815335
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) NULL pointer dereference (CVE-ID: CVE-2026-72392)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to a null pointer dereference in fib6_walk_continue() when resuming a multi-batch IPv6 FIB dump after a concurrent table insertion changes hash-chain ordering. A remote attacker can trigger netlink dump processing to cause a denial of service.

The issue occurs because walker state can become inconsistent, with the root referencing a different table while the node still points into the previous one.


Remediation

Install update from vendor's website.

References