CVE-2025-43402
📋 TL;DR
This memory corruption vulnerability in macOS allows malicious applications to cause system crashes or corrupt process memory. It affects macOS systems running vulnerable versions, potentially enabling denial of service or arbitrary code execution. All users running affected macOS versions should patch immediately.
💻 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
Complete system crash leading to denial of service, or arbitrary code execution with kernel privileges resulting in full system compromise.
Likely Case
Application crashes, system instability, or denial of service affecting user productivity and system availability.
If Mitigated
Limited impact with proper application sandboxing and privilege separation, potentially only affecting the malicious application itself.
🎯 Exploit Status
Exploitation requires user interaction to run malicious application. Memory corruption vulnerabilities can be challenging to weaponize reliably.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: macOS Tahoe 26.1
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 macOS Tahoe 26.1 update 5. Restart when prompted
🔧 Temporary Workarounds
Application Restriction
allRestrict installation and 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 software
- Enable full disk encryption and limit user privileges to reduce potential impact
🔍 How to Verify
Check if Vulnerable:
Check macOS version in System Settings > General > About. If version is earlier than 26.1, system is vulnerable.Check Version:
sw_versVerify Fix Applied:
Verify macOS version shows 26.1 or later in System Settings > General > About📡 Detection & Monitoring
Log Indicators:
- Kernel panics in system.log
- Application crash reports for unexpected termination
- Console.app entries showing memory corruption errors
Network Indicators:
- No direct network indicators as this is a local vulnerability
SIEM Query:
source="system.log" AND "kernel panic" OR source="Console" AND ("memory corruption" OR "unexpected termination")