CVE-2013-3140

Vulnerabilidad de uso despues de liberación en Microsoft Internet Explorer 9 permite a atacantes remotos ejecutar código de forma arbitraria a traves de un sitio web manipulado que desencadena acceso a un objeto CMarkup eliminado.

This vulnerability allows remote 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 or open a malicious file.
The specific flaw exists within the handling of CMarkup objects. By manipulating a document's elements an attacker can force a dangling pointer to be reused after it has been freed. An attacker can leverage this vulnerability to execute code under the context of the current process.