CVE-2025-21183 Windows Resilient File System (ReFS) Deduplication Service Elevation of Privilege Vulnerability
An attacker can exploit a double-free vulnerability in the Windows ReFS Deduplication Service to escalate privileges on affected systems.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-21183?
CVE-2025-21183 is a high-severity vulnerability in Microsoft Windows 11 24h2, published on 11 Feb 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Windows Resilient File System (ReFS) Deduplication Service Elevation of Privilege Vulnerability
Weakness: CWE-415
Which versions are affected by CVE-2025-21183?
It affects 2 products.
Products include Microsoft Windows 11 24h2, Microsoft Windows Server 2025.
How do I fix CVE-2025-21183?
No fix has been published for CVE-2025-21183 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-21183 being exploited?
There is no known exploitation of CVE-2025-21183 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Windows 11 24h2
- CVE-2025-60710 Microsoft Windows Link Following
- CVE-2026-54990 Remote Desktop Client Remote Code Execution Vulnerability
- CVE-2025-50165 Windows Graphics Component Remote Code Execution Vulnerability
- CVE-2025-21311 Windows NTLM V1 Elevation of Privilege Vulnerability
- CVE-2026-108463 Windows SmartScreen Security Feature Bypass Vulnerability
Sources
Also known as GHSA-c228-pg9x-pq8r.