A buffer overflow issue was addressed with improved memory handling. This issue is fixed in iOS 13.6 and iPadOS 13.6, macOS Catalina 10.15.6, tvOS 13.4.8, watchOS 6.2.8, iTunes 12.10.8 for Windows, iCloud for Windows 11.3, iCloud for Windows 7.20. Processing a maliciously crafted image may lead to arbitrary code execution.
https://support.apple.com/kb/HT211295
https://support.apple.com/kb/HT211294
https://support.apple.com/kb/HT211293
https://support.apple.com/kb/HT211291
https://support.apple.com/kb/HT211290