Double free in Windows and Windows Server - CVE-2025-49667
Published: July 8, 2025 / Updated: August 22, 2025
Vulnerability identifier: #VU112517
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear
CVE-ID: CVE-2025-49667
CWE-ID: CWE-415
Exploitation vector: Local access
Exploit availability:
Public exploit is available
Vendor: Microsoft
Affected software:
Windows
Windows Server
Windows
Windows Server
Detailed vulnerability description
The vulnerability allows a local user to gain elevated privileges on the system.
The vulnerability exists due to a boundary error in Windows Win32 Kernel Subsystem. A local user can pass specially crafted data to the application, trigger double free error and escalate privileges on the target system.
How to mitigate CVE-2025-49667
Install updates from vendor's website.