A denial of service issue was addressed with improved validation. This issue affected versions prior to iOS 12, macOS Mojave 10.14, tvOS 12, watchOS 5.
A memory corruption issue was addressed with improved memory handling. This issue affected versions prior to iOS 11.4.1, macOS High Sierra 10.13.6, tvOS 11.4.1, watchOS 4.3.2.
An out-of-bounds read issue existed that led to the disclosure of kernel memory. This was addressed with improved input validation. This issue affected versions prior to macOS High Sierra 10.13.6.