SB2026021096 - Multiple vulnerabilities in Microsoft Windows Subsystem for Linux
Published: February 10, 2026
Security Bulletin ID
SB2026021096
Severity
Low
Patch available
YES
Number of vulnerabilities
2
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 secuirty vulnerabilities.
1) Use-after-free (CVE-ID: CVE-2026-21242)
The vulnerability allows a local user to compromise vulnerable system.
The vulnerability exists due to a use-after-free error in Windows Subsystem for Linux. A local user can gain elevated privileges on the target system.
2) Race condition (CVE-ID: CVE-2026-21237)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a race condition in Windows Subsystem for Linux. A local user can exploit the race and gain unauthorized access to sensitive information and escalate privileges on the system.
Remediation
Install update from vendor's website.