SB20260815222 - Use-after-free in Linux kernel tipc

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Main Vulnerability Database SB20260815222

SB20260815222 - Use-after-free in Linux kernel tipc

Published: August 15, 2026

Security Bulletin ID SB20260815222
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Code execution

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-2026-74255)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to execute arbitrary code or cause a denial of service.

The vulnerability exists due to use-after-free in tipc_l2_send_msg() when handling TIPC layer 2 media disable operations concurrently with RCU readers. A local user can trigger concurrent access to a freed device pointer to execute arbitrary code or cause a denial of service.

The issue is caused by a race condition involving b->media_ptr and network-device lifetime management.


Remediation

Install update from vendor's website.

References