Description
<p>A denial of service vulnerability exists when Microsoft Hyper-V on a host server fails to properly validate specific malicious data from a user on a guest operating system.</p> <p>To exploit the 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.</p> <p>The security update addresses the vulnerability by resolving the conditions where Hyper-V would fail to handle these requests.</p>
Metrics
CVSS 3.1 7.8/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HAffected software
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows 10 Version 1803 | >= 10.0.0, < publication |
| Microsoft | Windows 10 Version 1809 | >= 10.0.0, < publication |
| Microsoft | Windows Server 2019 | >= 10.0.0, < publication |
| Microsoft | Windows Server 2019 (Server Core installation) | >= 10.0.0, < publication |
| Microsoft | Windows 10 Version 1909 | >= 10.0.0, < publication |
| Microsoft | Windows Server, version 1909 (Server Core installation) | >= 10.0.0, < publication |
| Microsoft | Windows 10 Version 1709 | >= 10.0.0, < publication |
| Microsoft | Windows 10 Version 1903 for x64-based Systems | >= 10.0.0, < publication |
| Microsoft | Windows Server, version 1903 (Server Core installation) | >= 10.0.0, < publication |
| Microsoft | Windows 10 Version 2004 | >= 10.0.0, < publication |
| Microsoft | Windows Server version 2004 | >= 10.0.0, < publication |
| Microsoft | Windows 10 Version 1607 | >= 10.0.0, < publication |
| Microsoft | Windows Server 2016 | >= 10.0.0, < publication |
| Microsoft | Windows Server 2016 (Server Core installation) | >= 10.0.0, < publication |
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1243Patch, Vendor Advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1243Patch, Vendor Advisory
Timeline
- Published
- Oct 16, 2020
- Last modified
- Jun 17, 2026
- NVD status
- Modified