CVE 2010-3812
Integer overflow in the Text::wholeText method in dom/Text.cpp in WebKit, as used in Apple Safari before 5.0.3 on Mac OS X 10.5 through 10.6 and Windows, and before 4.1.3 on Mac OS X 10.4; webkitgtk before 1.2.6; and possibly other products allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via vectors involving Text objects.
See the 
CVE page on Mitre.org
for more details.
