CVE-2011-1872: Microsoft Windows Server 2008

Medium severity, CVSS 4.7. EPSS: 2.6% chance of exploitation in the next 30 days.

Hyper-V in Microsoft Windows Server 2008 Gold, SP2, R2, and R2 SP1 allows guest OS users to cause a denial of service (host OS infinite loop) via malformed machine instructions in a VMBus packet, aka "VMBus Persistent DoS Vulnerability."

Affected products

• Microsoft Windows Server 2008: any version; version r2 only

Published 2011-06-16. Last modified 2026-06-16.