CVE-2025-54112
📋 TL;DR
CVE-2025-54112 is a use-after-free vulnerability in Microsoft Virtual Hard Drive that allows an authenticated attacker to execute arbitrary code with elevated privileges on the local system. This affects systems running vulnerable versions of Microsoft Windows with Virtual Hard Drive functionality enabled. Attackers must already have local access to exploit this vulnerability.
💻 Affected Systems
- Microsoft Windows
- Microsoft Virtual Hard Drive
📦 What is this software?
Windows 10 1507 by Microsoft
Windows 10 1507 by Microsoft
Windows 10 1607 by Microsoft
Windows 10 1607 by Microsoft
Windows 10 1809 by Microsoft
Windows 10 1809 by Microsoft
Windows 10 21h2 by Microsoft
Windows 10 22h2 by Microsoft
Windows 11 22h2 by Microsoft
Windows 11 23h2 by Microsoft
Windows 11 24h2 by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with SYSTEM/administrator privileges, enabling installation of persistent malware, credential theft, and lateral movement across the network.
Likely Case
Local privilege escalation allowing attackers to bypass security controls, access sensitive data, and maintain persistence on compromised systems.
If Mitigated
Limited impact due to proper access controls, least privilege principles, and network segmentation preventing lateral movement.
🎯 Exploit Status
Requires local authenticated access and knowledge of memory corruption techniques. Use-after-free vulnerabilities typically require precise timing and memory manipulation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Microsoft Security Update Guide for specific patch versions
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-54112
Restart Required: Yes
Instructions:
1. Open Windows Update settings
2. Check for updates
3. Install all available security updates
4. Restart the system when prompted
🔧 Temporary Workarounds
Disable Virtual Hard Drive functionality
windowsRemove or restrict access to VHD features if not required for business operations
Disable-WindowsOptionalFeature -Online -FeatureName Microsoft-Hyper-V -All
Note: This may disable virtualization features
Restrict user privileges
windowsImplement least privilege principles to limit who can access VHD functionality
🧯 If You Can't Patch
- Implement strict access controls and limit local administrator privileges
- Monitor for suspicious VHD-related activity and privilege escalation attempts
🔍 How to Verify
Check if Vulnerable:
Check Windows Update history for missing security patches related to CVE-2025-54112Check Version:
systeminfo | findstr /B /C:"OS Name" /C:"OS Version"Verify Fix Applied:
Verify the latest Windows security updates are installed and system has been restarted📡 Detection & Monitoring
Log Indicators:
- Unusual VHD mount operations
- Process creation with elevated privileges from non-admin users
- Access violations in system logs
Network Indicators:
- Lateral movement attempts following local privilege escalation
SIEM Query:
EventID=4688 AND NewProcessName CONTAINS "cmd.exe" OR "powershell.exe" AND SubjectUserName NOT IN (admin_users_list) AND PrivilegeList CONTAINS "SeDebugPrivilege"