Microsoft Internet Explorer 10 and 11 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site, aka "Internet Explorer Memory Corruption Vulnerability," a different vulnerability than CVE-2015-1733 and CVE-2015-2389.
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-065