Use-after-free vulnerability in Microsoft Internet Explorer 6, 7, and 8 allows remote attackers to execute arbitrary code via vectors related to Cascading Style Sheets (CSS) token sequences and the clip attribute, aka an "invalid flag reference" issue or "Uninitialized Memory Corruption Vulnerability," as exploited in the wild in November 2010.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12279
https://exchange.xforce.ibmcloud.com/vulnerabilities/62962
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-090
http://www.us-cert.gov/cas/techalerts/TA10-348A.html
http://www.symantec.com/connect/blogs/new-ie-0-day-used-targeted-attacks
http://www.microsoft.com/technet/security/advisory/2458511.mspx
http://www.kb.cert.org/vuls/id/899748
http://www.exploit-db.com/exploits/15421
http://www.exploit-db.com/exploits/15418
http://blogs.technet.com/b/msrc/archive/2010/11/02/microsoft-releases-security-advisory-2458511.aspx