Jan 2025: Windows Hyper-V NT Kernel Integration VSP Elevation of Privilege Vulnerability
CVE-2025-21334 Published on January 14, 2025

Windows Hyper-V NT Kernel Integration VSP Elevation of Privilege Vulnerability

Vendor Advisory NVD

Known Exploited Vulnerability

This Microsoft Windows Hyper-V NT Kernel Integration VSP Use-After-Free Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. Microsoft Windows Hyper-V NT Kernel Integration VSP contains a use-after-free vulnerability that allows a local attacker to gain SYSTEM privileges.

The following remediation steps are recommended / required by February 4, 2025: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Weakness Type

What is a Dangling pointer Vulnerability?

Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.

CVE-2025-21334 has been classified to as a Dangling pointer vulnerability or weakness.

Products Associated with CVE-2025-21334

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2025-21334 are published in these products:

Microsoft Windows Server 2025

Microsoft Windows 11 24h2

Microsoft Windows Server 2022 23h2

Microsoft Windows 11 23h2

Microsoft Windows 11

Microsoft Windows 10

Microsoft Windows Server 23h2

Affected Versions

Microsoft Windows 10 Version 21H2:

Version 10.0.19043.0 and below 10.0.19044.5371 is affected.

Microsoft Windows 11 version 22H2:

Version 10.0.22621.0 and below 10.0.22621.4751 is affected.

Microsoft Windows 10 Version 22H2:

Version 10.0.19045.0 and below 10.0.19045.5371 is affected.

Microsoft Windows Server 2025 (Server Core installation):

Version 10.0.26100.0 and below 10.0.26100.2894 is affected.

Microsoft Windows 11 version 22H3:

Version 10.0.22631.0 and below 10.0.22631.4751 is affected.

Microsoft Windows 11 Version 23H2:

Version 10.0.22631.0 and below 10.0.22631.4751 is affected.

Microsoft Windows Server 2022, 23H2 Edition (Server Core installation):

Version 10.0.25398.0 and below 10.0.25398.1369 is affected.

Microsoft Windows 11 Version 24H2:

Version 10.0.26100.0 and below 10.0.26100.2894 is affected.

Microsoft Windows Server 2025:

Version 10.0.26100.0 and below 10.0.26100.2894 is affected.

Exploit Probability

EPSS

4.13%

Percentile

88.32%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.