CVE-2025-31277
📋 TL;DR
This is a memory corruption vulnerability in Apple's WebKit browser engine affecting multiple Apple operating systems. Processing malicious web content could allow attackers to execute arbitrary code or cause denial of service. All users of affected Apple devices are potentially vulnerable.
💻 Affected Systems
- Safari
- iOS
- iPadOS
- macOS
- watchOS
- tvOS
- visionOS
📦 What is this software?
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 →Safari by Apple
Tvos by Apple
Watchos by Apple
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, or persistent malware installation.
Likely Case
Browser crash/denial of service or limited code execution within sandboxed browser context.
If Mitigated
Minimal impact if devices are fully patched and web content filtering is in place.
🎯 Exploit Status
Exploitation requires user to visit malicious website or view malicious content. No authentication required for initial access.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Safari 18.6, iOS 18.6, iPadOS 18.6, macOS Sequoia 15.6, watchOS 11.6, tvOS 18.6, visionOS 2.6
Vendor Advisory: https://support.apple.com/en-us/124147
Restart Required: Yes
Instructions:
1. Go to Settings > General > Software Update on iOS/iPadOS/watchOS/tvOS/visionOS. 2. Install available updates. 3. For macOS, go to System Settings > General > Software Update. 4. For Safari on older macOS versions, update through App Store.
🔧 Temporary Workarounds
Disable JavaScript
allTemporarily disable JavaScript in Safari to prevent exploitation via web content
Use alternative browser
allUse non-WebKit based browsers until patches are applied
🧯 If You Can't Patch
- Implement web content filtering to block malicious sites
- Restrict browsing to trusted websites only
🔍 How to Verify
Check if Vulnerable:
Check current OS version against patched versions listed in affected_systems.versionsCheck Version:
iOS/iPadOS: Settings > General > About > Version; macOS: About This Mac > macOS version; Safari: Safari menu > About SafariVerify Fix Applied:
Confirm OS version matches or exceeds patched versions: Safari ≥18.6, iOS ≥18.6, iPadOS ≥18.6, macOS ≥15.6, watchOS ≥11.6, tvOS ≥18.6, visionOS ≥2.6📡 Detection & Monitoring
Log Indicators:
- Safari/WebKit crash logs
- Unexpected process termination
- Memory access violation errors
Network Indicators:
- Connections to suspicious domains followed by browser crashes
- Unusual outbound traffic from Safari processes
SIEM Query:
source="*safari*" AND (event="crash" OR event="memory_violation")🔗 References
- https://support.apple.com/en-us/124147
- https://support.apple.com/en-us/124149
- https://support.apple.com/en-us/124152
- https://support.apple.com/en-us/124153
- https://support.apple.com/en-us/124154
- https://support.apple.com/en-us/124155
- http://seclists.org/fulldisclosure/2025/Aug/0
- http://seclists.org/fulldisclosure/2025/Jul/30
- http://seclists.org/fulldisclosure/2025/Jul/32
- http://seclists.org/fulldisclosure/2025/Jul/36
