CVE-2025-43218
📋 TL;DR
This vulnerability allows attackers to read memory contents outside the intended buffer when processing malicious USD (Universal Scene Description) files in macOS. It affects macOS systems before Sequoia 15.6. Successful exploitation could leak sensitive information from application memory.
💻 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
Memory disclosure could expose sensitive data like passwords, encryption keys, or other application secrets stored in memory, potentially enabling further attacks.
Likely Case
Information disclosure revealing application memory contents, which could include user data or system information useful for follow-on attacks.
If Mitigated
Limited impact with proper file handling controls and memory protection mechanisms in place.
🎯 Exploit Status
Exploitation requires user interaction to open a malicious USD file; no public exploit code has been disclosed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: macOS Sequoia 15.6
Vendor Advisory: https://support.apple.com/en-us/124149
Restart Required: Yes
Instructions:
1. Open System Settings 2. Click General 3. Click Software Update 4. Install macOS Sequoia 15.6 update 5. Restart when prompted
🔧 Temporary Workarounds
Disable USD file processing
allPrevent applications from processing USD files by removing file associations or using application controls
User education
allTrain users to avoid opening USD files from untrusted sources
🧯 If You Can't Patch
- Implement application whitelisting to prevent execution of vulnerable USD processing components
- Use network segmentation to isolate systems that must process USD files from sensitive networks
🔍 How to Verify
Check if Vulnerable:
Check macOS version: if earlier than Sequoia 15.6, system is vulnerableCheck Version:
sw_versVerify Fix Applied:
Verify macOS version is Sequoia 15.6 or later📡 Detection & Monitoring
Log Indicators:
- Application crashes when processing USD files
- Unusual memory access patterns in system logs
Network Indicators:
- Downloads of USD files from untrusted sources
- Outbound connections after USD file processing
SIEM Query:
source="macos_system_logs" AND (event="crash" OR event="memory_access") AND file_extension="usd"