A memory corruption issue was addressed with improved validation. This issue is fixed in tvOS 15.4, iOS 15.4 and iPadOS 15.4, watchOS 8.5. Processing a maliciously crafted image may lead to heap corruption.Referenceshttps://support.apple.com/en-us/HT213182https://support.apple.com/en-us/HT213193https://support.apple.com/en-us/HT213186http://packetstormsecurity.com/files/167144/AppleVideoDecoder-CreateHeaderBuffer-Out-Of-Bounds-Free.html