Microsoft has just released the following KB Article:
Description of Cumulative Update 5 for System Center 2012 R2 Configuration Manager
Summary:
This article describes the issues that are fixed and the functionality that is updated in Cumulative Update 5 (CU5) for Microsoft System Center 2012 R2 Configuration Manager.
Full details at:
https://support.microsoft.com/en-us/kb/3054451