A buffer overflow issue was addressed with improved memory handling. This issue is fixed in iOS 15.3 and iPadOS 15.3, watchOS 8.4, tvOS 15.3, Security Update 2022-001 Catalina, macOS Monterey 12.2, macOS Big Sur 11.6.3. A malicious application may be able to execute arbitrary code with kernel privileges.
https://support.apple.com/en-us/103177
https://support.apple.com/en-us/103175
https://support.apple.com/en-us/103173
https://support.apple.com/en-us/103172
https://support.apple.com/en-us/102848
https://support.apple.com/en-us/HT213059
https://support.apple.com/en-us/HT213057
https://support.apple.com/en-us/HT213056
https://support.apple.com/en-us/HT213055