CVE-2026-20602
📋 TL;DR
A cache handling vulnerability in macOS allows applications to cause denial-of-service conditions. This affects macOS Sequoia, Tahoe, and Sonoma operating systems before specific patch versions. Users running unpatched versions of these macOS releases are vulnerable.
💻 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 →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
Malicious application could crash system services or the entire operating system, disrupting user workflows and potentially causing data loss.
Likely Case
Local applications could trigger temporary service disruptions or application crashes without persistent system damage.
If Mitigated
With proper application sandboxing and least privilege principles, impact would be limited to isolated application failures.
🎯 Exploit Status
Exploitation requires local application execution. No public exploit code is known at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: macOS Sequoia 15.7.4, macOS Tahoe 26.3, macOS Sonoma 14.8.4
Vendor Advisory: https://support.apple.com/en-us/126348
Restart Required: No
Instructions:
1. Open System Settings 2. Click General 3. Click Software Update 4. Install available updates 5. Alternatively, use terminal: sudo softwareupdate --install --all
🔧 Temporary Workarounds
Application Sandboxing Enforcement
macOSEnforce strict application sandboxing policies to limit potential impact
🧯 If You Can't Patch
- Implement application allowlisting to restrict which applications can run
- Enhance monitoring for abnormal application behavior and system crashes
🔍 How to Verify
Check if Vulnerable:
Check macOS version in System Settings > General > About or run 'sw_vers' in terminalCheck Version:
sw_versVerify Fix Applied:
Verify macOS version is Sequoia 15.7.4+, Tahoe 26.3+, or Sonoma 14.8.4+📡 Detection & Monitoring
Log Indicators:
- Unexpected application crashes
- System service termination logs
- Kernel panic reports
Network Indicators:
- None - local vulnerability
SIEM Query:
source="macos_system_logs" AND (event="crash" OR event="panic" OR event="termination")