Provide references for CVE-2018-4456.
Where can I find more information about CVE-2018-4456?
References are available at: https://support.apple.com/kb/HT209139, https://support.apple.com/kb/HT208937, https://support.apple.com/kb/HT209341, http://seclists.org/fulldisclosure/2019/May/20, https://support.apple.com/kb/HT210119, https://seclists.org/bugtraq/2019/May/27.