SB20260816413 - Race condition in Linux kernel can

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Main Vulnerability Database SB20260816413

SB20260816413 - Race condition in Linux kernel can

Published: August 16, 2026

Security Bulletin ID SB20260816413
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) Race condition (CVE-ID: CVE-2026-72121)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

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 race condition in net/can/bcm.c when updating filter and timer values concurrently with handling incoming CAN traffic. A local user can trigger concurrent bcm_rx_setup() and RX handler activity to cause a denial of service.

The issue affects concurrent access to timer, filter, and stored frame state in the broadcast manager CAN implementation.


Remediation

Install update from vendor's website.

References