SB20260918429 - Race condition in Linux kernel sched

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Main Vulnerability Database SB20260918429

SB20260918429 - Race condition in Linux kernel sched

Published: September 18, 2026

Security Bulletin ID SB20260918429
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Data manipulation

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Race condition (CVE-ID: CVE-2026-90248)

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

CVSSv4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N]


The vulnerability allows a local user to silently unlink an active traffic classifier.

The vulnerability exists due to improper ownership tracking in tc_new_tfilter() when handling concurrent traffic-control filter insertions. A local user can race another request to insert a traffic-control filter at the same chain and priority to silently unlink an active traffic classifier.


Remediation

Install update from vendor's website.

References