Microsoft Windows Hyper-V NT Kernel Integration VSP Use-After-Free Vulnerability
Description
Microsoft Windows Hyper-V NT Kernel Integration VSP contains a use-after-free vulnerability that allows a local attacker to gain SYSTEM privileges.
What to do
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
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Details
- Vendor
- Microsoft
- Product
- Windows Hyper-V
- CVE
- CVE-2025-21335
- Affected versions
- Windows 10 Version 21H2 10.0: from 10.0.19044.0 to 10.0.19044.5371 (excluded) — fixed in 10.0.19044.5371
Windows 10 Version 22H2 10.0: from 10.0.19045.0 to 10.0.19045.5371 (excluded) — fixed in 10.0.19045.5371
Windows 11 version 22H2 10.0: from 10.0.22621.0 to 10.0.22621.4751 (excluded) — fixed in 10.0.22621.4751
Windows 11 version 22H3 10.0: from 10.0.22631.0 to 10.0.22631.4751 (excluded) — fixed in 10.0.22631.4751
Windows 11 Version 23H2 10.0: from 10.0.22631.0 to 10.0.22631.4751 (excluded) — fixed in 10.0.22631.4751
Windows 11 Version 24H2 10.0: from 10.0.26100.0 to 10.0.26100.2894 (excluded) — fixed in 10.0.26100.2894
Windows Server 2022, 23H2 Edition (Server Core installation) 10.0: from 10.0.25398.0 to 10.0.25398.1369 (excluded) — fixed in 10.0.25398.1369
Windows Server 2025 10.0: from 10.0.26100.0 to 10.0.26100.2894 (excluded) — fixed in 10.0.26100.2894
Windows Server 2025 (Server Core installation) 10.0: from 10.0.26100.0 to 10.0.26100.2894 (excluded) — fixed in 10.0.26100.2894 (from the advisory and NVD; check the exact builds in the official advisory) - CVSS score
- 7.8
- Actively exploited
- Yes, listed in the CISA Known Exploited Vulnerabilities catalog
- CISA due date
- February 4, 2025 (deadline for US federal agencies: a good benchmark for you too)
- Source
- CISA KEV – original advisory
- Published
- January 14, 2025
The description and the recommended action are quoted from the public advisory; severity, exploitation status and affected versions are compiled automatically from public sources and may contain errors. The vendor's original advisory prevails: check it before taking action. This information is provided without warranty and does not replace a professional assessment.