Multiple memory corruption issues were addressed with improved state management. 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. A malicious application may be able to execute arbitrary code with system privileges.
https://support.apple.com/kb/HT211291
https://support.apple.com/kb/HT211290