CVE-2025-62567: Windows Hyper-V Denial of Service Vulnerability

Overview

Severity
Medium (CVSS 5.3)
CVSS Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Category
Denial of Service
Exploit Status
Not Exploited
Exploitation Likelihood
Unlikely
Patch Tuesday
2025-Dec
Released
2025-12-09
EPSS Score
0.15% (percentile: 35.9%)

Description

Integer underflow (wrap or wraparound) in Windows Hyper-V allows an authorized attacker to deny service over a network.

FAQ

According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability? Successful exploitation of this vulnerability requires an attacker to gather information specific to the environment and take additional actions prior to exploitation to prepare the target environment.

Affected Products (21)

Windows

  • Windows 10 Version 1809 for x64-based Systems
  • Windows Server 2019
  • Windows Server 2019 (Server Core installation)
  • Windows Server 2022
  • Windows Server 2022 (Server Core installation)
  • Windows 10 Version 21H2 for x64-based Systems
  • Windows Server 2025 (Server Core installation)
  • Windows 11 Version 25H2 for ARM64-based Systems
  • Windows 11 Version 25H2 for x64-based Systems
  • Windows 11 Version 23H2 for ARM64-based Systems
  • Windows 11 Version 23H2 for x64-based Systems
  • Windows Server 2022, 23H2 Edition (Server Core installation)
  • Windows 11 Version 24H2 for ARM64-based Systems
  • Windows 11 Version 24H2 for x64-based Systems
  • Windows Server 2025
  • Windows 10 Version 1607 for x64-based Systems
  • Windows Server 2016
  • Windows Server 2016 (Server Core installation)

ESU

  • Windows 10 Version 22H2 for x64-based Systems
  • Windows Server 2012 R2
  • Windows Server 2012 R2 (Server Core installation)

Security Updates (10)

Acknowledgments

<a href="https://x.com/hackyboiiiii">Mitchell Turner</a> with <a href="https://www.preludesecurity.com/">Prelude Research</a>, https://x.com/33y0re Connor McGarr with https://www.preludesecurity.com<https://www.preludesecurity.com/> Prelude Research

Revision History

  • 2025-12-09: Information published.