The sandbox protection mechanism in Microsoft Internet Explorer 9 allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via unknown vectors, as demonstrated against Adobe Flash Player by VUPEN during a Pwn2Own competition at CanSecWest 2013.
Improper Restriction of Operations within the Bounds of a Memory Buffer The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary.