Use-after-free in Microsoft Windows and Windows Server - CVE-2025-21335
Published: January 14, 2025
Vulnerability identifier: #VU102615
CSH Severity: High
CVSS v4: 8.5 [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]
CVE-ID: CVE-2025-21335
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
The vulnerability is being exploited in the wild
Vulnerability details
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error in Windows Hyper-V NT Kernel Integration VSP component. A local user can execute arbitrary code with SYSTEM privileges.
Note, the vulnerability is being actively exploited in the wild.
Affected software
Microsoft Windows
Windows Server
Windows Server
How to mitigate CVE-2025-21335
Install updates from vendor's website.
Microsoft Windows - addressed in versions 10 21H2 10.0.19044.5371, 10 22H2 10.0.19045.5371, 11 22H2 10.0.22621.4751, 11 23H2 10.0.22631.4751, 11 24H2 10.0.26100.3107
Windows Server - addressed in versions 2016 10.0.14393.7785, 2022 23H2 10.0.25398.1369, 2025 10.0.26100.2894
Windows Server - addressed in versions 2016 10.0.14393.7785, 2022 23H2 10.0.25398.1369, 2025 10.0.26100.2894