Unspecified vulnerability in the MySQL Server component in Oracle MySQL 5.1.64 and earlier, and 5.5.26 and earlier, allows remote authenticated users to affect availability via unknown vectors related to Server Optimizer.
https://exchange.xforce.ibmcloud.com/vulnerabilities/79388
http://www.ubuntu.com/usn/USN-1621-1
http://www.oracle.com/technetwork/topics/security/cpuoct2012-1515893.html
http://www.debian.org/security/2012/dsa-2581
http://security.gentoo.org/glsa/glsa-201308-06.xml
http://secunia.com/advisories/53372
http://secunia.com/advisories/51309