Microsoft Internet Explorer 6, 7, and 8 does not properly handle objects in memory, which allows remote attackers to execute arbitrary code by accessing an object that (1) was not properly initialized or (2) is deleted, leading to memory corruption, related to a "dangling pointer," aka "Uninitialized Memory Corruption Vulnerability," a different vulnerability than CVE-2010-2556 and CVE-2011-0035.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12261
https://exchange.xforce.ibmcloud.com/vulnerabilities/64912
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-003
http://www.vupen.com/english/advisories/2011/0318
http://www.securitytracker.com/id?1025038
http://www.securityfocus.com/bid/46158