Unspecified vulnerability in Oracle MySQL 5.1.68 and earlier, 5.5.30 and earlier, and 5.6.10 and earlier allows remote authenticated users to affect availability via unknown vectors related to Server Optimizer.
http://rhn.redhat.com/errata/RHSA-2013-0772.html
http://secunia.com/advisories/53372
http://security.gentoo.org/glsa/glsa-201308-06.xml
http://www.mandriva.com/security/advisories?name=MDVSA-2013:150
http://www.oracle.com/technetwork/topics/security/cpuapr2013-1899555.html