The issue was addressed with improved bounds checks. This issue is fixed in tvOS 15.6, watchOS 8.7, iOS 15.6 and iPadOS 15.6, macOS Monterey 12.5, Safari 15.6. Processing web content may lead to arbitrary code execution.
https://support.apple.com/en-us/HT213346
https://support.apple.com/en-us/HT213345
https://support.apple.com/en-us/HT213342