Microsoft: Windows Hyper-V Denial of Service Vulnerability
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. 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. The security update addresses the vulnerability by resolving the conditions where Hyper-V would fail to handle these requests.
Windows 10,Windows Server, version 1909 (Server Core installation),Windows Server, version 1903 (Server Core installation)