Use-after-free vulnerability in Microsoft Internet Explorer 8 and 9 allows remote attackers to execute arbitrary code via a crafted web site that triggers access to an object that (1) was not properly initialized or (2) is deleted, aka "OnMove Use After Free Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15852
https://exchange.xforce.ibmcloud.com/vulnerabilities/78756
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-063
http://www.us-cert.gov/cas/techalerts/TA12-255A.html