An unspecified vulnerability in the server optimizer subcomponent of the MySQL protocol component of the Oracle MySQL server allows remote authenticated attackers to alter availability via unspecified vectors.
This issue affects the version of the mysql package, as shipped with Red Hat Enterprise Linux 6.
This issue has been addressed in following products:
Red Hat Enterprise Linux 6
Via RHSA-2013:0219 https://rhn.redhat.com/errata/RHSA-2013-0219.html