SB20260626219 - Use-after-free in Linux kernel batman-adv

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Main Vulnerability Database SB20260626219

SB20260626219 - Use-after-free in Linux kernel batman-adv

Published: June 26, 2026

Security Bulletin ID SB20260626219
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-2026-52919)

CWE-ID: CWE-416 - Use After Free

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 and trigger a use-after-free.

The vulnerability exists due to a use-after-free in batadv_tp_sender_shutdown() and batadv_tp_send() in the batman-adv tp_meter component when shutting down the throughput meter sender through multiple paths. A local user can trigger timeout, cancellation, or normal completion paths to cause a denial of service and trigger a use-after-free.

The issue occurs because the sending counter can underflow to a negative value, causing the sender kernel thread to continue running after interface removal.


Remediation

Install update from vendor's website.

References