CVE-2022-26770
📋 TL;DR
This CVE-2022-26770 is an out-of-bounds read vulnerability in macOS that allows malicious applications to execute arbitrary code with kernel privileges. It affects macOS Catalina, Big Sur, and Monterey 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 →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 privileges, allowing attackers to install persistent malware, steal sensitive data, and pivot to other systems.
Likely Case
Local privilege escalation where a malicious application gains kernel privileges to bypass security controls and access protected resources.
If Mitigated
Limited impact if systems are fully patched and application execution is restricted through security policies.
🎯 Exploit Status
Exploitation requires a malicious application to be executed on the target system. No public exploit code has been disclosed as of the advisory date.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Security Update 2022-004 Catalina, macOS Big Sur 11.6.6, macOS Monterey 12.4
Vendor Advisory: https://support.apple.com/en-us/HT213255
Restart Required: Yes
Instructions:
1. Open System Preferences > Software Update. 2. Install available security updates. 3. Restart the system when prompted.
🔧 Temporary Workarounds
Application Execution Control
macosRestrict execution of untrusted applications using macOS security features
sudo spctl --master-enable
sudo spctl --enable --label "Developer ID"
🧯 If You Can't Patch
- Implement strict application allowlisting to prevent execution of untrusted applications
- Use macOS Gatekeeper to only allow apps from the App Store and identified developers
🔍 How to Verify
Check if Vulnerable:
Check macOS version: sw_vers -productVersion. If version is Catalina, Big Sur 11.6.5 or earlier, or Monterey 12.3 or earlier, system is vulnerable.Check Version:
sw_vers -productVersionVerify Fix Applied:
Verify macOS version is Catalina with Security Update 2022-004, Big Sur 11.6.6 or later, or Monterey 12.4 or later.📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- Unexpected kernel extensions loading
- Suspicious privilege escalation attempts
Network Indicators:
- Unusual outbound connections from kernel processes
SIEM Query:
source="macos" AND (event_type="kernel_panic" OR process_name="kernel" AND action="privilege_escalation")