Double free in Windows Server - CVE-2025-21183
Published: February 11, 2025
Vulnerability identifier: #VU103778
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-21183
CWE-ID: CWE-415
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Microsoft
Affected software:
Windows Server
Windows Server
Detailed vulnerability description
The vulnerability allows a local attacker to escalate privileges on the system.
The vulnerability exists due to a boundary error in Windows Resilient File System (ReFS) Deduplication Service. A local attacker can win a race condition, trigger double free error and gain elevated privileges on the target system.
How to mitigate CVE-2025-21183
Install updates from vendor's website.