CVE-2026-20652
📋 TL;DR
This CVE describes a memory handling vulnerability in Apple operating systems and Safari that could allow a remote attacker to cause denial-of-service. The issue affects macOS, iOS, iPadOS, visionOS, and Safari users. Apple has addressed the vulnerability with improved memory handling in updated versions.
💻 Affected Systems
- macOS
- iOS
- iPadOS
- visionOS
- Safari
📦 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 →Safari by Apple
⚠️ Risk & Real-World Impact
Worst Case
Remote attacker could crash affected systems or applications, causing service disruption and potential data loss in active sessions.
Likely Case
Targeted denial-of-service attacks against vulnerable systems, potentially disrupting services or user sessions.
If Mitigated
Minimal impact with proper patching and network segmentation in place.
🎯 Exploit Status
No public exploit code available. The vulnerability requires remote access but specific exploitation details are not disclosed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: macOS Tahoe 26.3, iOS 18.7.5 and iPadOS 18.7.5, visionOS 26.3, iOS 26.3 and iPadOS 26.3, Safari 26.3
Vendor Advisory: https://support.apple.com/en-us/126346
Restart Required: No
Instructions:
1. Open System Settings on macOS or Settings on iOS/iPadOS/visionOS. 2. Navigate to General > Software Update. 3. Install available updates. 4. For Safari, update through the App Store or system updates.
🔧 Temporary Workarounds
Network Segmentation
allRestrict network access to vulnerable systems to reduce attack surface
Application Whitelisting
macOSLimit which applications can run on affected systems
🧯 If You Can't Patch
- Implement strict network access controls to limit exposure
- Monitor systems for abnormal memory usage or crashes
🔍 How to Verify
Check if Vulnerable:
Check current OS version against affected versions listCheck Version:
macOS: sw_vers -productVersion; iOS/iPadOS: Settings > General > About > Version; Safari: Safari > About SafariVerify Fix Applied:
Verify installed version matches or exceeds patched versions📡 Detection & Monitoring
Log Indicators:
- Unexpected application crashes
- Abnormal memory usage patterns
- Kernel panic logs
Network Indicators:
- Unusual network traffic to Apple services
- Suspicious web requests
SIEM Query:
source="apple_system_logs" AND (event="crash" OR event="panic" OR memory_usage>threshold)