CVE-2022-26761
📋 TL;DR
This is a memory corruption vulnerability in macOS that allows an application to execute arbitrary code with kernel privileges. It affects macOS Catalina and Big Sur systems. Successful exploitation gives attackers complete control over the affected system.
💻 Affected Systems
- macOS
📦 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 persistence, data theft, and complete control over all system resources and user data.
Likely Case
Privilege escalation from user-level to kernel-level access, enabling installation of rootkits, persistence mechanisms, and bypassing security controls.
If Mitigated
Limited impact due to proper patch management and application sandboxing preventing malicious applications from reaching vulnerable code paths.
🎯 Exploit Status
Exploitation requires a malicious application to be executed on the target system. No public exploit code is known at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Security Update 2022-004 Catalina and macOS Big Sur 11.6.6
Vendor Advisory: https://support.apple.com/en-us/HT213255
Restart Required: Yes
Instructions:
1. Open System Preferences 2. Click Software Update 3. Install Security Update 2022-004 Catalina or macOS Big Sur 11.6.6 4. Restart the system when prompted
🔧 Temporary Workarounds
Application Restriction
allRestrict installation and execution of untrusted applications through MDM policies or user education
🧯 If You Can't Patch
- Implement strict application control policies to prevent execution of untrusted applications
- Isolate vulnerable systems from critical networks and implement network segmentation
🔍 How to Verify
Check if Vulnerable:
Check macOS version in System Preferences > About This Mac. If running Catalina or Big Sur version prior to Security Update 2022-004 or 11.6.6, system is vulnerable.Check Version:
sw_versVerify Fix Applied:
Verify macOS version shows Security Update 2022-004 Catalina or macOS Big Sur 11.6.6 in System Preferences > About This Mac.📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- Unexpected kernel module loading
- Suspicious privilege escalation attempts
Network Indicators:
- Unusual outbound connections from macOS systems
- Command and control traffic patterns
SIEM Query:
source="macos" AND (event_type="kernel_panic" OR process_name="kernel_task" AND action="privilege_escalation")