IOGraphicsFamily in Apple OS X before 10.9.4 allows local users to bypass the ASLR protection mechanism by leveraging read access to a kernel pointer in an IOKit object.
http://www.securitytracker.com/id/1030505
http://support.apple.com/kb/HT6296
http://archives.neohapsis.com/archives/bugtraq/2014-06/0172.html