Microsoft has released an emergency update to address a bug that prevents certain virtual machines hosted on the Azure cloud platform from launching when Virtualisation-Based Security (VBS) is enabled.
The bug was introduced by a fix rolled out in last week’sJuly 2025 Patch Tuesday.
What could be affected by this Azure VM launch bug?
General Enterprise Azure VMs using the v8.0 configuration version and the Standard security type are potentially affected by the issue. The problem primarily impact...