CVE-2025-43401
📋 TL;DR
This CVE describes a denial-of-service vulnerability in macOS that was addressed through improved input validation. Remote attackers could potentially cause affected systems to become unresponsive or crash. Users running vulnerable versions of macOS Sequoia, Tahoe, or Sonoma are affected.
💻 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 unavailability requiring reboot, potentially affecting multiple systems in an organization simultaneously.
Likely Case
Temporary service disruption affecting specific applications or network services on vulnerable macOS systems.
If Mitigated
Minimal impact with proper network segmentation and updated systems.
🎯 Exploit Status
Apple has addressed the issue but hasn't disclosed technical details about exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: macOS Sequoia 15.7.2, macOS Tahoe 26.1, macOS Sonoma 14.8.2
Vendor Advisory: https://support.apple.com/en-us/125634
Restart Required: Yes
Instructions:
1. Open System Settings 2. Click General 3. Click Software Update 4. Install available updates 5. Restart when prompted
🔧 Temporary Workarounds
Network Segmentation
allRestrict network access to vulnerable macOS systems to reduce attack surface.
🧯 If You Can't Patch
- Implement strict network access controls to limit exposure
- Monitor systems for unusual resource consumption or crashes
🔍 How to Verify
Check if Vulnerable:
Check macOS version in System Settings > General > AboutCheck Version:
sw_versVerify Fix Applied:
Verify macOS version is Sequoia 15.7.2, Tahoe 26.1, or Sonoma 14.8.2 or newer📡 Detection & Monitoring
Log Indicators:
- Unexpected application crashes
- Kernel panic logs
- High resource consumption alerts
Network Indicators:
- Unusual traffic patterns to macOS systems
- Connection attempts to unusual ports
SIEM Query:
source="macOS" AND (event_type="crash" OR event_type="panic")