Microsoft Internet Explorer 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-2015-1732, CVE-2015-1742, CVE-2015-1747, and CVE-2015-1753.
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-056