Multiple memory corruption issues were addressed with improved memory handling. This issue is fixed in iOS 13.1 and iPadOS 13.1, tvOS 13, Safari 13.0.1, iTunes for Windows 12.10.1, iCloud for Windows 10.7, iCloud for Windows 7.14. Processing maliciously crafted web content may lead to arbitrary code execution.
https://support.apple.com/HT210637
https://support.apple.com/HT210636