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CVE-2025-21334

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

Published
Last modified
published
Listed in CISA KEV
Fix
Fixed in 10.0.19044.5371, 10.0.19045.5371, 10.0.22621.4751, 10.0.22631.4751, 10.0.26100.2894, and 1 more
None on Exploit-DB, Metasploit or GitHub

Summary

Microsoft Windows systems that run the Hyper-V virtualization feature are affected by this flaw in the NT Kernel Integration Virtual Service Provider component. An attacker who can already run code on the system could exploit it to gain higher, administrator-level privileges.

Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.

Read the original description

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

Timeline

  1. Added to CISA KEV

    CISA has evidence of exploitation in the wild

  2. CVE published
  3. CISA remediation deadline

    Due date for US federal agencies to patch

  4. Record last updated

Affected versions

  • Microsoft Windows 10 Version 21H2

    From 10.0.19044.0 · fixed in 10.0.19044.5371

  • Microsoft Windows 10 Version 22H2

    From 10.0.19045.0 · fixed in 10.0.19045.5371

  • Microsoft Windows 11 version 22H2

    From 10.0.22621.0 · fixed in 10.0.22621.4751

  • Microsoft Windows 11 version 22H3

    From 10.0.22631.0 · fixed in 10.0.22631.4751

  • Microsoft Windows 11 Version 23H2

    From 10.0.22631.0 · fixed in 10.0.22631.4751

  • Microsoft Windows 11 Version 24H2

    From 10.0.26100.0 · fixed in 10.0.26100.2894

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

    From 10.0.25398.0 · fixed in 10.0.25398.1369

  • Microsoft Windows Server 2025

    From 10.0.26100.0 · fixed in 10.0.26100.2894

  • Microsoft Windows Server 2025 (Server Core installation)

    From 10.0.26100.0 · fixed in 10.0.26100.2894

References 1

msrc.microsoft.com