Medium · 6.2 CVE-2025-29955 EUVD-2025-14421GHSA-v487-rh87-cwxh

Windows Hyper-V Denial of Service Vulnerability

Published May 13, 2025 · Updated Feb 13, 2026 · Assigned by microsoft

Vendor: Microsoft Product: Windows 11 Version 24H2 Product: Windows Server 2022, 23H2 Edition (Server Core installation) Product: Windows Server 2025 Product: Windows Server 2025 (Server Core installation) Platform: Windows

Description

Improper input validation in Windows Hyper-V allows an unauthorized attacker to deny service locally.

Affected products

Vendor	Product	Affected	Fixed
Microsoft	Windows 11 Version 24H2	10.0.26100.0 – < 10.0.26100.4061	10.0.26100.4061
Microsoft	Windows Server 2022, 23H2 Edition (Server Core installation)	10.0.25398.0 – < 10.0.25398.1611	10.0.25398.1611
Microsoft	Windows Server 2025	10.0.26100.0 – < 10.0.26100.4061	10.0.26100.4061
Microsoft	Windows Server 2025 (Server Core installation)	10.0.26100.0 – < 10.0.26100.4061	10.0.26100.4061

Advisories 3

WID-SEC-2025-1050 Microsoft Windows Server: Mehrere Schwachstellen ermöglichen Privilegieneskalation BSI CERT-Bund (WID) · Mar 15, 2026
NCSC-2025-0159 Kwetsbaarheden verholpen in Microsoft Windows NCSC-NL (Netherlands) · May 13, 2025
MSRC-CVE-2025-29955 Windows Hyper-V Denial of Service Vulnerability Microsoft Security Response Center · May 13, 2025

References

Windows Hyper-V Denial of Service Vulnerability vendor-advisory patch