CVE-2025-43377
📋 TL;DR
This CVE describes an out-of-bounds read vulnerability in Apple operating systems that could allow a malicious app to cause a denial-of-service condition. The vulnerability affects iOS, iPadOS, and macOS systems running specific versions. Apple has addressed this with improved bounds checking in their latest updates.
💻 Affected Systems
- iOS
- iPadOS
- 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
A malicious app could crash the affected system, causing complete denial-of-service and potential data loss if unsaved work exists.
Likely Case
An app could cause temporary system instability or application crashes, requiring restart of affected services or the device.
If Mitigated
With proper app sandboxing and security controls, impact would be limited to the malicious app's process only.
🎯 Exploit Status
Exploitation requires a malicious app to be installed and executed on the target device. No public exploit code is currently available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: iOS 18.7.2, iPadOS 18.7.2, macOS Sequoia 15.7.2, macOS Tahoe 26.1
Vendor Advisory: https://support.apple.com/en-us/125633
Restart Required: Yes
Instructions:
1. Open Settings app. 2. Navigate to General > Software Update. 3. Download and install the available update. 4. Restart device when prompted.
🔧 Temporary Workarounds
App Restriction
allRestrict installation of untrusted apps to prevent potential exploitation
For iOS/iPadOS: Settings > Screen Time > Content & Privacy Restrictions > iTunes & App Store Purchases > Installing Apps > Don't Allow
🧯 If You Can't Patch
- Implement strict app installation policies and only allow trusted, verified applications
- Monitor for unusual app behavior or system crashes that could indicate exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check current OS version in Settings > General > About > Software VersionCheck Version:
For macOS: sw_vers -productVersion; For iOS/iPadOS: Check in Settings > General > AboutVerify Fix Applied:
Verify version is equal to or greater than iOS 18.7.2, iPadOS 18.7.2, macOS Sequoia 15.7.2, or macOS Tahoe 26.1📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- Application crash reports with memory access violations
- System watchdog timeout events
Network Indicators:
- No direct network indicators as this is a local vulnerability
SIEM Query:
source="apple_system_logs" AND ("panic" OR "out of bounds" OR "memory access")