CVE-2025-31203
📋 TL;DR
This CVE describes an integer overflow vulnerability in multiple Apple operating systems that could allow an attacker on the local network to cause a denial-of-service. The vulnerability affects macOS, tvOS, iPadOS, iOS, watchOS, and visionOS. Users of affected versions who haven't applied the security updates are vulnerable.
💻 Affected Systems
- macOS
- tvOS
- iPadOS
- iOS
- watchOS
- visionOS
📦 What is this software?
Ipados by Apple
Ipados by Apple
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 →Tvos by Apple
Watchos by Apple
⚠️ Risk & Real-World Impact
Worst Case
Complete system crash or service disruption requiring reboot, potentially affecting multiple devices on the local network simultaneously.
Likely Case
Temporary denial-of-service affecting specific services or applications, causing disruption until system recovery.
If Mitigated
Minimal impact with proper network segmentation and updated systems, potentially only affecting isolated test environments.
🎯 Exploit Status
Exploitation requires local network access but no authentication. The integer overflow nature suggests moderate technical complexity to weaponize.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: macOS Sequoia 15.4, tvOS 18.4, iPadOS 17.7.6, macOS Sonoma 14.7.5, iOS 18.4 and iPadOS 18.4, watchOS 11.4, visionOS 2.4
Vendor Advisory: https://support.apple.com/en-us/122371
Restart Required: Yes
Instructions:
1. Open System Settings > General > Software Update. 2. Install available updates. 3. Restart device when prompted. For enterprise: Deploy updates via MDM or Apple Business/School Manager.
🔧 Temporary Workarounds
Network Segmentation
allIsolate vulnerable devices from untrusted networks to prevent local network attackers from reaching them.
Firewall Rules
allImplement strict firewall rules to limit network traffic to vulnerable devices from trusted sources only.
🧯 If You Can't Patch
- Segment vulnerable devices on isolated network segments with strict access controls
- Implement network monitoring for unusual traffic patterns or denial-of-service attempts
🔍 How to Verify
Check if Vulnerable:
Check current OS version against affected versions. On macOS: About This Mac > macOS version. On iOS/iPadOS: Settings > General > About > Software Version.Check Version:
macOS: sw_vers -productVersion, iOS/iPadOS: Settings > General > About > Software VersionVerify Fix Applied:
Verify OS version matches or exceeds the patched versions listed in the fix information.📡 Detection & Monitoring
Log Indicators:
- System crash logs
- Kernel panic reports
- Unexpected service terminations
- High CPU/memory usage spikes
Network Indicators:
- Unusual network traffic patterns to vulnerable ports
- Multiple connection attempts from single sources
SIEM Query:
source="apple_system_logs" AND (event="panic" OR event="crash" OR event="terminated") AND dest_version < "patched_version"