Unspecified vulnerability in Oracle MySQL Server 5.5.38 and earlier allows remote authenticated users to affect availability via vectors related to SERVER:DDL.
http://www.securityfocus.com/bid/70510
http://www.oracle.com/technetwork/topics/security/cpuoct2014-1972960.html
http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html
http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00016.html