A remote code execution vulnerability exists when Windows Hyper-V on a host server fails to properly validate input from an authenticated user on a guest operating system, aka 'Windows Hyper-V Remote Code Execution Vulnerability'. This CVE ID is unique from CVE-2019-1397, CVE-2019-1398.
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1389