What is CVE-2025-29955?

CVE-2025-29955 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. Windows Hyper-V Denial of Service Vulnerability

Which CVE IDs does CVE-2025-29955 cover?

CVE-2025-29955 covers the following CVE IDs: CVE-2025-29955. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2025-29955?

CVE-2025-29955 has a CVSS v3 base score of 6.2, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2025-29955?

CVE-2025-29955 affects 4 products, including: Windows 11 Version 24H2 for x64-based Systems; Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025; Windows Server 2025 (Server Core installation).

CVE-2025-29955HighCVSS 6.2

Windows Hyper-V Denial of Service Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

May 31, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2025-29955 →

📋 Description

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

🎯 Affected products4

Windows 11 Version 24H2 for x64-based Systems
Windows Server 2022, 23H2 Edition (Server Core installation)
Windows Server 2025
Windows Server 2025 (Server Core installation)

✅ Remediation

KB5058411 (Security Update) — fixed build 10.0.26100.4061 KB5058497 (SecurityHotpatchUpdate) — fixed build 10.0.26100.3981 KB5058384 (Security Update) — fixed build 10.0.25398.1611

🔗 References (7)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-29955
patchhttps://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5058411
referencehttps://support.microsoft.com/help/5058411
patchhttps://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5058497
referencehttps://support.microsoft.com/help/5058497
patchhttps://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5058384
referencehttps://support.microsoft.com/help/5058384