CVE-2022-26741
📋 TL;DR
This is a kernel-level buffer overflow vulnerability in macOS that allows malicious applications to execute arbitrary code with kernel privileges. It affects macOS Monterey systems before version 12.4. Successful exploitation gives attackers complete control over the affected system.
💻 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
Complete system compromise with kernel-level persistence, data theft, and ability to bypass all security controls.
Likely Case
Malicious application gains kernel privileges to install rootkits, disable security software, or establish persistence.
If Mitigated
Limited impact if systems are patched, applications are from trusted sources, and proper endpoint protection is in place.
🎯 Exploit Status
Requires local application execution; no public exploit code is known at this time.
🛠️ 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 Whitelisting
allRestrict application execution to only trusted, signed applications from the App Store or identified developers.
🧯 If You Can't Patch
- Implement strict application control policies to prevent unauthorized applications from running
- Deploy endpoint detection and response (EDR) solutions to monitor for suspicious kernel-level activity
🔍 How to Verify
Check if Vulnerable:
Check macOS version: if running macOS Monterey version earlier than 12.4, system is vulnerable.Check Version:
sw_versVerify Fix Applied:
Verify macOS version is 12.4 or later and check that the security update was applied successfully.📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- Unexpected kernel extensions loading
- Processes running with unexpected kernel privileges
Network Indicators:
- Unusual outbound connections from kernel processes
- DNS requests from kernel space
SIEM Query:
process.parent.name:kernel AND process.name:sh OR process.name:bash