Unspecified vulnerability in Oracle MySQL Server 5.6.23 and earlier allows remote authenticated users to affect availability via unknown vectors related to Server : Security : Privileges.
https://security.gentoo.org/glsa/201507-19
http://www.securitytracker.com/id/1032121
http://www.oracle.com/technetwork/topics/security/cpuapr2015-2365600.html
http://lists.opensuse.org/opensuse-security-announce/2015-05/msg00026.html