Unspecified vulnerability in Oracle MySQL Server 5.5.39 and earlier and 5.6.20 and earlier allows remote authenticated users to affect availability via vectors related to SERVER:INNODB DML FOREIGN KEYS.
http://www.securityfocus.com/bid/70451
http://www.oracle.com/technetwork/topics/security/cpuoct2014-1972960.html
http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
http://security.gentoo.org/glsa/glsa-201411-02.xml
http://secunia.com/advisories/62073
http://secunia.com/advisories/61579
http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00016.html