The issue was addressed with improved checks. This issue is fixed in Safari 17.5, iOS 16.7.8 and iPadOS 16.7.8, iOS 17.5 and iPadOS 17.5, macOS Sonoma 14.5, tvOS 17.5, watchOS 10.5. An attacker with arbitrary read and write capability may be able to bypass Pointer Authentication.
https://support.apple.com/kb/HT214106
https://support.apple.com/kb/HT214104
https://support.apple.com/kb/HT214102
https://support.apple.com/kb/HT214100
https://support.apple.com/en-us/HT214106
https://support.apple.com/en-us/HT214104
https://support.apple.com/en-us/HT214103
https://support.apple.com/en-us/HT214102
https://support.apple.com/en-us/HT214101
https://support.apple.com/en-us/120905
https://support.apple.com/en-us/120903
https://support.apple.com/en-us/120902
https://support.apple.com/en-us/120901
https://support.apple.com/en-us/120898
https://support.apple.com/en-us/120896
http://www.openwall.com/lists/oss-security/2024/05/21/1
http://seclists.org/fulldisclosure/2024/May/9
http://seclists.org/fulldisclosure/2024/May/17
http://seclists.org/fulldisclosure/2024/May/16