Updates to the virtual machines are typically performed as in the physical environment, providing only limited capabilities. For Red Hat virtual machines updates can be downloaded from the Red Hat Network. For Windows virtual machines you would apply the relevant MS update mechanisms. There is no specific integrated function in RHV-M to update virtual machines or templates.

Centralized patching mechanism for Red Hat machines is possible via Satellite.
This is a Fee-based Add-On; Details - http://www.redhat.com/en/technologies/linux-platforms/satellite