CVE-2009-2195 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2009-2195): Buffer overflow in WebKit in Apple Safari before 4.0.3 allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via crafted floating-point numbers.
Presumably all affected versions are gone from tree. Closing as discussed with keytoaster.