CVE-2025-48539
📋 TL;DR
This vulnerability in Android's Bluetooth stack allows remote attackers to execute arbitrary code on affected devices without user interaction. It affects Android devices with vulnerable Bluetooth implementations, potentially compromising device security and data.
💻 Affected Systems
- Android
📦 What is this software?
Android by Google
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise with remote code execution, allowing attackers to install malware, steal data, or gain persistent access.
Likely Case
Device compromise leading to data theft, surveillance, or botnet enrollment, particularly in public spaces with Bluetooth enabled.
If Mitigated
Limited impact if Bluetooth is disabled or devices are patched, though proximity attacks remain possible in vulnerable configurations.
🎯 Exploit Status
Exploitation requires proximity/adjacent network access via Bluetooth. No user interaction needed, making it attractive for targeted attacks.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Android security patch level September 2025 or later
Vendor Advisory: https://source.android.com/security/bulletin/2025-09-01
Restart Required: Yes
Instructions:
1. Check for system updates in Settings > System > System update. 2. Install the September 2025 Android security patch. 3. Reboot the device after installation.
🔧 Temporary Workarounds
Disable Bluetooth
androidTurn off Bluetooth when not in use to prevent exploitation
adb shell settings put global bluetooth_on 0
Settings > Connected devices > Connection preferences > Bluetooth > Toggle off
Restrict Bluetooth visibility
androidSet Bluetooth to non-discoverable mode to reduce attack surface
adb shell settings put global bluetooth_discoverability 0
Settings > Connected devices > Connection preferences > Bluetooth > Device name > Turn off 'Make device discoverable'
🧯 If You Can't Patch
- Disable Bluetooth completely and use wired alternatives where possible
- Implement network segmentation to isolate vulnerable devices from critical systems
🔍 How to Verify
Check if Vulnerable:
Check Android security patch level in Settings > About phone > Android version > Security patch level. If before September 2025, device is vulnerable.Check Version:
adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Verify security patch level shows 'September 5, 2025' or later after applying update.📡 Detection & Monitoring
Log Indicators:
- Unusual Bluetooth connection attempts in Bluetooth system logs
- Crash reports from com.android.bluetooth or related services
Network Indicators:
- Suspicious Bluetooth pairing requests from unknown devices
- Abnormal Bluetooth traffic patterns
SIEM Query:
source="android_logs" AND (process="bluetooth" OR process="com.android.bluetooth") AND (event="crash" OR event="exception" OR message="*SendPacketToPeer*")