WebKit, as used in Google Chrome before 7.0.517.44, webkitgtk before 1.2.6, and other products, does not properly handle large text areas, which allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via a crafted HTML document.
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.