CVE-2025-22435
📋 TL;DR
This vulnerability allows memory corruption via type confusion in Android's Bluetooth AVDT protocol implementation. An attacker with paired Bluetooth device access could potentially execute arbitrary code or gain elevated privileges without user interaction. All Android devices with vulnerable Bluetooth stacks are affected.
💻 Affected Systems
- Android
📦 What is this software?
Android by Google
Android by Google
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, data theft, and persistent backdoor installation.
Likely Case
Local privilege escalation allowing attackers to bypass security boundaries and access sensitive data or system functions.
If Mitigated
Limited impact if Bluetooth is disabled or strict device pairing policies are enforced.
🎯 Exploit Status
Exploitation requires Bluetooth pairing access but no additional privileges. The type confusion vulnerability could be leveraged for memory corruption attacks.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: April 2025 Android Security Patch or later
Vendor Advisory: https://source.android.com/security/bulletin/2025-04-01
Restart Required: Yes
Instructions:
1. Check for Android system updates in Settings > System > System update. 2. Install the April 2025 security patch or later. 3. Restart the device after installation.
🔧 Temporary Workarounds
Disable Bluetooth
androidTurn off Bluetooth to prevent exploitation via paired devices
adb shell settings put global bluetooth_on 0
Settings > Connected devices > Connection preferences > Bluetooth > Toggle off
Remove Paired Devices
androidUnpair all Bluetooth devices to eliminate attack vectors
Settings > Connected devices > Previously connected devices > Tap gear icon next to each device > Forget
🧯 If You Can't Patch
- Disable Bluetooth when not in use and implement strict Bluetooth device pairing policies
- Segment Bluetooth-enabled devices on isolated network segments to limit lateral movement
🔍 How to Verify
Check if Vulnerable:
Check Android security patch level in Settings > About phone > Android version > Security patch level. If before April 2025, device is vulnerable.Check Version:
adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Verify security patch level shows April 2025 or later after applying update.📡 Detection & Monitoring
Log Indicators:
- Unusual Bluetooth AVDT protocol errors in system logs
- Multiple failed Bluetooth connection attempts from paired devices
- Memory corruption warnings in Bluetooth stack logs
Network Indicators:
- Abnormal Bluetooth protocol traffic patterns
- Unexpected AVDT message sequences
SIEM Query:
source="android_system" AND ("avdt" OR "bluetooth") AND ("corruption" OR "type confusion" OR "memory error")