Microsoft Internet Explorer Multiple CSS Imports Memory Corruption Vulnerability

This vulnerability allows attackers to execute arbitrary code on vulnerable installations of Microsoft Internet Explorer. User interaction is required to exploit this vulnerability in that the target must visit a malicious page. The specific flaw exists due to improper garbage collection when multiple “imports” are used on a “styleSheets” collection. Crafting a long chain of CSS imports in an HTML document results in a memory corruption eventually leading to code execution.