Unspecified vulnerability in the MySQL Server component in Oracle MySQL 5.1.61 and earlier, and 5.5.21 and earlier, allows remote authenticated users to affect availability via unknown vectors related to Server Optimizer, a different vulnerability than CVE-2012-1690.
http://www.securityfocus.com/bid/53058
http://www.oracle.com/technetwork/topics/security/cpuapr2012-366314.html
http://security.gentoo.org/glsa/glsa-201308-06.xml
http://secunia.com/advisories/53372
http://secunia.com/advisories/51309
http://secunia.com/advisories/49179