A memory consumption issue was addressed with improved memory handling. This issue is fixed in tvOS 15.4, iOS 15.4 and iPadOS 15.4, iTunes 12.12.3 for Windows, watchOS 8.5, macOS Monterey 12.3. Processing a maliciously crafted image may lead to heap corruption.
https://support.apple.com/en-us/HT213193
https://support.apple.com/en-us/HT213188
https://support.apple.com/en-us/HT213186