SB20251226192 - NULL pointer dereference in Linux kernel mptcp
Published: December 26, 2025 Updated: December 31, 2025
Security Bulletin ID
SB20251226192
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) NULL pointer dereference (CVE-ID: CVE-2023-54085)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the function in net/mptcp/fastopen.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.