Oracle has released few days ago the for Exadata. The Patch contains all needed Software to bring your exadata to the latestest release.
Remember to check MOS Note Database Machine and Exadata Storage Server 11g Release 2 (11.2) Supported Versions (Doc ID 888828.1) for the latest updates.
I will try to post a example how to upgrade the exadata soon.
As always, comments are welcome