CVE-2025-43368
📋 TL;DR
A use-after-free vulnerability in Apple Safari, iOS, and iPadOS allows processing malicious web content to cause unexpected crashes. This affects users running vulnerable versions of these Apple products. The issue has been addressed in the latest updates.
💻 Affected Systems
- Safari
- iOS
- iPadOS
📦 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
⚠️ Risk & Real-World Impact
Worst Case
Potential arbitrary code execution leading to full device compromise if combined with other vulnerabilities, though this specific CVE only documents crashes.
Likely Case
Denial of service through Safari crashes when visiting malicious websites, disrupting user browsing sessions.
If Mitigated
Minimal impact with proper patching and security controls in place.
🎯 Exploit Status
Exploitation requires user interaction (visiting malicious website). No public exploit code is documented in the provided references.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Safari 26, iOS 26, iPadOS 26
Vendor Advisory: https://support.apple.com/en-us/125108
Restart Required: No
Instructions:
1. Open Settings app. 2. Navigate to General > Software Update. 3. Install available updates for iOS/iPadOS. 4. For Safari on macOS, update through System Preferences > Software Update.
🔧 Temporary Workarounds
Disable JavaScript
allTemporarily disable JavaScript in Safari settings to prevent malicious web content execution.
🧯 If You Can't Patch
- Implement web filtering to block known malicious websites.
- Use alternative browsers until patches can be applied.
🔍 How to Verify
Check if Vulnerable:
Check Safari version in Safari > About Safari. Check iOS/iPadOS version in Settings > General > About.Check Version:
For macOS: sw_vers -productVersion. For iOS/iPadOS: Settings > General > About > Version.Verify Fix Applied:
Confirm version is Safari 26 or later, iOS 26 or later, or iPadOS 26 or later.📡 Detection & Monitoring
Log Indicators:
- Safari crash logs with memory access violations
- Unexpected browser termination events
Network Indicators:
- Connections to suspicious domains followed by browser crashes
SIEM Query:
source="*safari*" AND (event="crash" OR event="terminated")