CVE-2016-7777 – Citrix XenServer Security Update

A security vulnerability has been identified in Citrix XenServer that may allow malicious user code within an HVM guest VM to read or modify the contents of certain registers belonging to other tasks within that same guest VM.

This vulnerability affects all currently supported versions of Citrix XenServer up to and including Citrix XenServer 7.0.

The following vulnerability has been addressed:

  • CVE-2016-7777 (Medium): CR0.TS and CR0.EM not always honored for x86 HVM guests

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