Microsoft Windows Hyper-V NT Kernel Integration VSP Heap-based Buffer Overflow Vulnerability
Description
Microsoft Windows Hyper-V NT Kernel Integration VSP contains a heap-based buffer overflow 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.
Running Microsoft devices? Get an email when a new vulnerability comes out. Free, unsubscribe in one click.
Turn on Microsoft alerts
Turn on Microsoft alerts
Details
- Vendor
- Microsoft
- Product
- Windows Hyper-V
- CVE
- CVE-2025-21333
- 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.