An unspecified vulnerability in the Server Optimizer subcomponent of Oracle MySQL allows remote authenticated attackers to cause a denial of service.
This flaw affects MySQL 5.1.68 and earlier, 5.5.30 and earlier, and 5.6.10 and earlier.
This issue has been addressed in following products:
Red Hat Enterprise Linux 6
Via RHSA-2013:0772 https://rhn.redhat.com/errata/RHSA-2013-0772.html