A memory corruption issue exists in WebKit's handling of nested 'use' elements in SVG documents. Visiting a maliciously crafted website may lead to an unexpected application termination or arbitrary code execution. This issue is addressed through improved handling of nested 'use' elements in SVG documents.
Red Hat would like to thank Drew Yao of Apple Product Security for responsibly reporting this issue. Upstream acknowledges Aki Helin of OUSPG as the original reporter.