I think PAC is some protection measures. Pointer Authentication Code It’s a form of pointer integrity checking that you can read about in the Platform Securit

I think PAC is some protection measures. Pointer Authentication Code It’s a form of pointer integrity checking that you can read about in the Platform Security Guide (this used to be called the iOS Security Whitepaper) released today: https://support.apple.com/en-sg/guide/security/seca5759bf02/web https://support.apple.com/en-sg/guide/security/seca5759bf02/... Google’s Project Zero also wrote a post about this mechanism, including a detailed case study of where they were able to bypass it: https://googleprojectzero.blogspot.com/2019/02/examining-pointer-authentication-on.html?m=1 https://googleprojectzero.blogspot.com/2019/02/examining-poi...