Unspecified vulnerability in Oracle MySQL 5.7.11 and earlier allows remote authenticated users to affect availability via vectors related to Server: Optimizer.Referenceshttp://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.htmlhttp://www.securitytracker.com/id/1036362http://www.securityfocus.com/bid/91787http://www.securityfocus.com/bid/91910