A denial of service issue was addressed with improved memory handling. This issue is fixed in iOS 13.3.1 and iPadOS 13.3.1, tvOS 13.3.1, Safari 13.0.5, iTunes for Windows 12.10.4, iCloud for Windows 11.0, iCloud for Windows 7.17. A malicious website may be able to cause a denial of service.
https://support.apple.com/HT210948
https://support.apple.com/HT210947
https://security.gentoo.org/glsa/202003-22
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00004.html