CVE-2015-0423
Unspecified vulnerability in Oracle MySQL Server 5.6.22 and earlier allows remote authenticated users to affect availability via unknown vectors related to Optimizer.
Date published : 2015-04-16
http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html
http://www.oracle.com/technetwork/topics/security/cpuapr2015-2365600.html