A memory corruption issue exists in WebKit's rendering of HTML object outlines. Visiting a maliciously crafted website may lead to an unexpected application termination or arbitrary code execution. This issue is addressed through improved memory management. Credit to Jose A. Vazquez of spa-s3c.blogspot.com for reporting this issue. References: https://bugs.webkit.org/show_bug.cgi?id=41373 http://trac.webkit.org/changeset/63048 http://support.apple.com/kb/HT4334