Unspecified vulnerability in the MySQL Server component in Oracle MySQL 5.5.x allows remote authenticated users to affect availability via unknown vectors, a different vulnerability than CVE-2012-0486, CVE-2012-0487, CVE-2012-0488, CVE-2012-0489, CVE-2012-0491, CVE-2012-0493, and CVE-2012-0495.
http://www.ubuntu.com/usn/USN-1397-1
http://www.oracle.com/technetwork/topics/security/cpujan2012-366304.html