A logic issue was addressed with improved validation. This issue is fixed in Security Update 2021-008 Catalina, macOS Big Sur 11.6.2. An application may be able to execute arbitrary code with kernel privileges.Referenceshttps://support.apple.com/kb/HT212978https://support.apple.com/en-us/HT212979https://support.apple.com/en-us/HT212981
