SB20260928410 - Race condition in Linux kernel mptcp
Published: September 28, 2026 Updated: September 30, 2026
Security Bulletin ID
SB20260928410
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Race condition (CVE-ID: CVE-2026-97523)
CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to a race condition in the mptcp scheduler when subflow socket states change. A remote attacker can trigger the race condition to cause a denial of service.
Remediation
Install update from vendor's website.