CVE-2022-26749
📋 TL;DR
This is a buffer overflow vulnerability in macOS that allows applications to execute arbitrary code with kernel privileges. It affects macOS Monterey systems before version 12.4. Attackers could gain complete control of affected systems.
💻 Affected Systems
- macOS Monterey
📦 What is this software?
Macos by Apple
macOS is Apple's desktop and laptop operating system powering Mac computers used by millions of professionals, developers, creative professionals, and enterprise users worldwide. Built on a Unix foundation with the Darwin kernel and modern Cocoa frameworks, macOS delivers a seamless ecosystem integr...
Learn more about Macos →⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with kernel-level privileges leading to complete data loss, persistent backdoors, and lateral movement across the network.
Likely Case
Local privilege escalation allowing attackers to bypass security controls, install malware, or access sensitive system resources.
If Mitigated
Limited impact with proper patch management and security controls in place, though still a serious local privilege escalation risk.
🎯 Exploit Status
Requires local access or ability to execute malicious application. No public exploit code available at disclosure.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: macOS Monterey 12.4
Vendor Advisory: https://support.apple.com/en-us/HT213257
Restart Required: Yes
Instructions:
1. Open System Preferences > Software Update
2. Install macOS Monterey 12.4 update
3. Restart the system when prompted
🔧 Temporary Workarounds
Application Control
allRestrict execution of untrusted applications to reduce attack surface
🧯 If You Can't Patch
- Implement strict application allowlisting to prevent execution of untrusted code
- Segment vulnerable systems from critical network resources and implement network isolation
🔍 How to Verify
Check if Vulnerable:
Check macOS version: System Preferences > About This MacCheck Version:
sw_versVerify Fix Applied:
Verify macOS version is 12.4 or later in System Preferences > About This Mac📡 Detection & Monitoring
Log Indicators:
- Unexpected kernel extensions loading
- Privilege escalation attempts in system logs
- Unusual process creation with elevated privileges
Network Indicators:
- Unusual outbound connections from system processes
- Lateral movement attempts from affected systems
SIEM Query:
Process creation with parent-child privilege escalation OR kernel extension loading from untrusted sources