The Node_GetData function in corec/corec/node/node.c in mkvalidator 0.5.1 allows remote attackers to cause a denial of service (Null pointer dereference and application crash) via a crafted mkv file.Referenceshttp://packetstormsecurity.com/files/144902/mkvalidator-0.5.1-Denial-Of-Service.htmlhttp://seclists.org/fulldisclosure/2017/Nov/19https://github.com/Matroska-Org/foundation-source/issues/24
