The last Update Rollup for SCSM 2012 R2 is now UR9 https://support.microsoft.com/en-us/kb/3129780 which includes all prior released updates, except UR8 which only contains the new HTML based portal.
You can now directly apply UR9 onto the Data Warehouse server, all SCSM management servers and all desktops with SCSM consoles installed. (No need to apply onto SharePoint Self Service Portal servers).
Note A new update for HTML Self Service Portal is also available separately. You can obtain the update here.