SB2026021694 - Improper locking in Linux kernel mptcp
Published: February 16, 2026
Security Bulletin ID
SB2026021694
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper locking (CVE-ID: CVE-2026-23169)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the __reset_counters() function in net/mptcp/pm_kernel.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.