CVE-2020-26597
📋 TL;DR
This vulnerability in LG Android devices allows attackers to cause denial of service through Wi-Fi subsystem crashes due to incorrect input validation. It affects LG mobile devices running Android 9.0 and 10. The issue requires proximity to the target device via Wi-Fi.
💻 Affected Systems
- LG mobile devices
📦 What is this software?
Android by Google
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Persistent denial of service rendering the device's Wi-Fi functionality unusable, potentially requiring factory reset or physical repair.
Likely Case
Temporary Wi-Fi disconnection and device instability requiring reboot to restore functionality.
If Mitigated
Limited impact with proper network segmentation and Wi-Fi security controls in place.
🎯 Exploit Status
Exploitation requires sending specially crafted Wi-Fi packets to target device. No authentication needed but requires proximity.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: October 2020 security update (LVE-SMP-200022)
Vendor Advisory: https://lgsecurity.lge.com/
Restart Required: Yes
Instructions:
1. Check for system updates in device Settings. 2. Install October 2020 or later security update. 3. Reboot device after installation.
🔧 Temporary Workarounds
Disable Wi-Fi when not needed
androidTurn off Wi-Fi functionality to prevent exploitation
Settings > Network & Internet > Wi-Fi > Toggle OFF
Use trusted Wi-Fi networks only
androidConfigure device to connect only to known, secure Wi-Fi networks
Settings > Network & Internet > Wi-Fi > Network preferences > Turn off 'Connect to open networks'
🧯 If You Can't Patch
- Implement network segmentation to isolate vulnerable devices
- Deploy Wi-Fi intrusion detection systems to monitor for malicious packets
🔍 How to Verify
Check if Vulnerable:
Check Android version in Settings > About phone > Android version. If version is 9.0 or 10 and security patch level is before October 2020, device is vulnerable.Check Version:
Settings > About phone > Android version and Android security patch levelVerify Fix Applied:
Verify security patch level is October 2020 or later in Settings > About phone > Android security patch level.📡 Detection & Monitoring
Log Indicators:
- Wi-Fi subsystem crashes
- Kernel panic logs
- Unexpected Wi-Fi disconnections
Network Indicators:
- Unusual Wi-Fi packet patterns
- Malformed Wi-Fi frames targeting LG devices
SIEM Query:
source="android_logs" AND ("Wi-Fi crash" OR "kernel panic" OR "wlan0 error")