CVE-2025-31263
📋 TL;DR
This memory corruption vulnerability in macOS allows malicious applications to corrupt coprocessor memory, potentially leading to arbitrary code execution or system compromise. It affects macOS systems running versions prior to Sequoia 15.4. Users who run untrusted applications are particularly 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 →⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with kernel-level privileges, allowing attackers to install persistent malware, steal sensitive data, or create backdoors.
Likely Case
Application-level compromise leading to data theft, privilege escalation, or denial of service on affected systems.
If Mitigated
Limited impact if systems are fully patched and run only trusted applications from verified sources.
🎯 Exploit Status
Exploitation requires a malicious application to be executed on the target system. No public exploit code has been identified at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: macOS Sequoia 15.4
Vendor Advisory: https://support.apple.com/en-us/122373
Restart Required: Yes
Instructions:
1. Open System Settings 2. Click General 3. Click Software Update 4. Install macOS Sequoia 15.4 update 5. Restart when prompted
🔧 Temporary Workarounds
Application Restriction
allRestrict installation and execution of untrusted applications using macOS security settings
sudo spctl --master-enable
sudo spctl --enable
🧯 If You Can't Patch
- Implement strict application allowlisting to prevent execution of untrusted applications
- Isolate vulnerable systems from critical networks and implement network segmentation
🔍 How to Verify
Check if Vulnerable:
Check macOS version in System Settings > General > About. If version is earlier than 15.4, system is vulnerable.Check Version:
sw_versVerify Fix Applied:
Verify macOS version shows 15.4 or later in System Settings > General > About📡 Detection & Monitoring
Log Indicators:
- Unexpected application crashes
- Kernel panic logs
- Suspicious process memory access patterns
Network Indicators:
- Unusual outbound connections from macOS systems
- Beaconing to unknown external IPs
SIEM Query:
source="macos" AND (event_category="kernel" OR event_category="application_crash") AND severity>=high