Hyper-V is the most secure hypervisor today with a very good security track record, nevertheless a few security issues that did arise over the years that have always been addressed quickly.
Microsoft just released a new critical security update to address a vulnerability in Windows Hyper-V that could allow remote code execution (3072000).
The following articles contain additional information about this security update as it relates to individual product versions. The articles may contain known issue information.
- 3046359 MS15-068: Description of the security update for Windows Hyper-V: July 14, 2015
- 3046339 MS15-068: Description of the security update for Windows Hyper-V: July 14, 2015
This security update is rated Critical for Windows Hyper-V on Windows Server 2008, Windows Server 2008 R2, Windows 8 and Windows Server 2012, and Windows 8.1 and Windows Server 2012 R2.
The security update addresses the vulnerabilities by correcting how Hyper-V initializes system data structures in guest virtual machines.
For more information about this update, see Microsoft Knowledge Base Article 3072000.
Please secure and update your environment effectively now.