Unspecified vulnerability in the MySQL Server component in Oracle MySQL 5.5.26 and earlier allows remote authenticated users to affect availability via unknown vectors related to Server.
https://exchange.xforce.ibmcloud.com/vulnerabilities/79387
http://www.ubuntu.com/usn/USN-1621-1
http://www.oracle.com/technetwork/topics/security/cpuoct2012-1515893.html
http://www.mandriva.com/security/advisories?name=MDVSA-2013:150