Microsoft has just released the following KB Article:
Description of Cumulative Update 4 for System Center 2012 R2 Configuration Manager Clients for Linux and UNIX
Summary:
This article describes the issues that are fixed and the functionality that is updated in Cumulative Update 4 (CU4) for System Center 2012 R2 Configuration Manager Clients for Linux and UNIX. CU4 for System Center 2012 R2 Configuration Manager Clients for Linux and UNIX is intended for use with the following installations of Configuration Manager:
- System Center 2012 Configuration Manager SP1
- System Center 2012 Configuration Manager SP2
- System Center 2012 R2 Configuration Manager
- System Center 2012 R2 Configuration Manager SP1
https://support.microsoft.com/en-gb/kb/3069152