CVE-2021-26416: Windows Hyper-V Denial of Service Vulnerability

Overview

Severity

High (CVSS 7.7)

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C

Category

Denial of Service

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2021-Apr

Released

2021-04-13

EPSS Score

2.18% (percentile: 84.3%)

FAQ

How can an attacker exploit this vulnerability? An attacker who already has a privileged account on a guest operating system, running as a virtual machine, could run a specially crafted application. This can cause the host OS to crash by sending specially crafted request.

Affected Products (12)

Windows

• Windows 10 Version 1809 for x64-based Systems
• Windows Server 2019
• Windows Server 2019 (Server Core installation)
• Windows 10 Version 1909 for x64-based Systems
• Windows Server, version 1909 (Server Core installation)
• Windows 10 Version 2004 for x64-based Systems
• Windows Server, version 2004 (Server Core installation)
• Windows 10 Version 20H2 for x64-based Systems
• Windows Server, version 20H2 (Server Core Installation)
• Windows 10 Version 1607 for x64-based Systems
• Windows Server 2016
• Windows Server 2016 (Server Core installation)

Security Updates (4)

• 5001342
• 5001337
• 5001330
• 5001347

Revision History

• 2021-04-13: Information published.