SB20260824219 - Use-after-free in Linux kernel tipc

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB20260824219

SB20260824219 - Use-after-free in Linux kernel tipc

Published: August 24, 2026

Security Bulletin ID SB20260824219
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) Use-after-free (CVE-ID: CVE-2026-74609)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 6.8 [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]


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

The vulnerability exists due to a use-after-free in tipc_node_link_down() in the TIPC subsystem when handling link-down events and bearer disable operations concurrently. A local user can trigger a race condition that frees a link object while it is still being dereferenced to cause a denial of service.

The issue can result in both a use-after-free read in tipc_link_is_establishing() and a use-after-free write via tipc_link_reset() during the establishing branch.


Remediation

Install update from vendor's website.

References