What is the last Mysql Version supported in REDHAT 6? Maybe not such a good question ! But my Linux admin is to busy to answer my doubts. SO:

I have all my Mysql servers running on 5.1.69 version(the free one) that comes with RedHat O.S. My users are forced to upgrade their Mysql Versions because of the Drupal and moodle needs !! 
  So i need to know if RedHat goes beyond  5.1.69 version or not. If not i will install a new version with no support or buy Oralcle support (which is not an option i think for my users as they are so cheap kkkkkkkkk)
THX
Here's a list of supported platforms: http://www.mysql.com/support/supportedplatforms/database.html.

The MySQL yum repo is detailed here: http://dev.mysql.com/downloads/repo/ - That has binaries for MySQL 5.5, 5.6 and 5.7.