CVE-2025-43366
📋 TL;DR
This CVE describes an out-of-bounds read vulnerability in macOS that could allow an application to access coprocessor memory. The vulnerability affects macOS systems prior to version 26 (Tahoe). Successful exploitation could lead to information disclosure of sensitive data stored in coprocessor 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
An attacker could read sensitive data from coprocessor memory, potentially exposing cryptographic keys, authentication tokens, or other protected information.
Likely Case
Information disclosure of limited memory contents, potentially revealing application data or system information.
If Mitigated
Minimal impact with proper application sandboxing and privilege separation in place.
🎯 Exploit Status
Exploitation requires a malicious application to be installed and executed on the target system. No known public exploits available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: macOS Tahoe 26
Vendor Advisory: https://support.apple.com/en-us/125110
Restart Required: No
Instructions:
1. Open System Settings 2. Click General 3. Click Software Update 4. Install macOS Tahoe 26 update 5. Follow on-screen instructions to complete installation
🔧 Temporary Workarounds
Application Sandboxing Enforcement
macOSEnsure all applications run with appropriate sandboxing and privilege restrictions to limit memory access.
🧯 If You Can't Patch
- Implement strict application control policies to prevent untrusted applications from executing
- Use endpoint protection solutions that can detect and prevent memory access violations
🔍 How to Verify
Check if Vulnerable:
Check macOS version: 1. Click Apple menu > About This Mac 2. If version is earlier than 26, system is vulnerableCheck Version:
sw_versVerify Fix Applied:
Verify macOS version is 26 or later in About This Mac📡 Detection & Monitoring
Log Indicators:
- Unusual memory access patterns in system logs
- Application crash reports related to memory violations
Network Indicators:
- No direct network indicators - local vulnerability
SIEM Query:
source="macos_system_logs" AND (event="memory_access_violation" OR event="segmentation_fault")