A buffer overflow was addressed with improved bounds checking. This issue is fixed in watchOS 8.7, tvOS 15.6, iOS 15.6 and iPadOS 15.6, macOS Monterey 12.5. A remote user may be able to cause kernel code execution.
https://support.apple.com/en-us/HT213346
https://support.apple.com/en-us/HT213345