MS15-042  Vulnerability in Windows Hyper-V Could Allow Denial of Service

2015-04-14 This security update resolves a vulnerability in Microsoft Windows. The vulnerability could allow denial of service if an authenticated attacker runs a specially crafted application in a virtual machine (VM) session. Note that the denial of service does not allow an attacker to execute code or elevate user rights on other VMs running on the Hyper-V host; however, it could cause other VMs on the host to not be manageable in Virtual Machine Manager.
Vulnerabilities addressed in this bulletin:

Windows Hyper-V DoS Vulnerability

A denial of service vulnerability exists in Hyper-V when an authenticated attacker runs a specially crafted application in a virtual machine (VM) session.
CVE-2015-1647

Bulletin details at Microsoft.com