This issue was addressed with improved checks. This issue is fixed in tvOS 15, watchOS 8, iOS 15 and iPadOS 15. Processing a maliciously crafted dfont file may lead to arbitrary code execution.Referenceshttps://support.apple.com/en-us/HT212814https://support.apple.com/en-us/HT212819https://support.apple.com/en-us/HT212815https://support.apple.com/kb/HT212869
