An out-of-bounds write issue was addressed with improved input validation. This issue is fixed in iOS 16.2 and iPadOS 16.2, macOS Ventura 13.1, tvOS 16.2, watchOS 9.2. An app may be able to execute arbitrary code with kernel privileges.
https://support.apple.com/en-us/HT213535
https://support.apple.com/en-us/HT213532
https://support.apple.com/en-us/HT213536
https://support.apple.com/en-us/HT213530
http://seclists.org/fulldisclosure/2022/Dec/27
http://seclists.org/fulldisclosure/2022/Dec/26