Apple Pointer Authentication (PAC) Bypass Vulnerability Advisory (CVE-2024-27834)

Users must update their devices to the latest available firmware versions to mitigate this risk.

1. Standard OS Update - **iOS/iPadOS:** Go to Settings > General > Software Update. - **macOS:** Go to System Settings > General > Software Update.

2. Command Line Update (macOS)

# Check for available updates
softwareupdate -l

# Install all pending updates and restart
sudo softwareupdate -iaR

3. Enterprise Mitigation - Enforce OS update policies via MDM solutions to ensure all corporate assets meet the minimum secure baseline (iOS 17.5 / macOS 14.5).

This vulnerability targets Apple's Pointer Authentication (PAC), a hardware-level security feature designed to prevent memory corruption exploits by signing pointers with cryptographic signatures. CVE-2024-27834 arises from improved checks being bypassed in the PAC implementation. An attacker who has already achieved arbitrary memory read/write access—typically through a separate initial exploit—can leverage this flaw to forge valid pointers and subvert the system's control flow integrity. Given its inclusion in the CISA KEV catalog and a high EPSS score of 0.94, this vulnerability is a critical component in sophisticated exploit chains used in real-world attacks.