SB20260812393 - Race condition in Linux kernel trace

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Main Vulnerability Database SB20260812393

SB20260812393 - Race condition in Linux kernel trace

Published: August 12, 2026

Security Bulletin ID SB20260812393
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-2026-68146)

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 the ftrace trace_parser handling in ftrace_regex_write(), ftrace_graph_write(), ftrace_regex_release(), and ftrace_graph_release() when processing concurrent writes and release operations on a shared trace file descriptor. A local user can issue concurrent operations from multiple threads to cause a denial of service.

The issue occurs when a userspace process shares an opened trace file descriptor across multiple threads, causing corruption of the parser's internal state fields.


Remediation

Install update from vendor's website.

References