SB20260414147 - Multiple vulnerabilities in Microsoft Windows TDI Translation Driver (tdx.sys)
Published: April 14, 2026
Security Bulletin ID
SB20260414147
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-2026-27908)
The vulnerability allows a local user to compromise vulnerable system.
The vulnerability exists due to a use-after-free error in Windows TDI Translation Driver (tdx.sys). A local user can win a race condition and gain elevated privileges on the target system.
2) Race condition (CVE-ID: CVE-2026-27921)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a race condition in Windows TDI Translation Driver (tdx.sys). A local user can exploit the race and escalate privileges on the system.
Remediation
Install update from vendor's website.