CVE-2025-36937
📋 TL;DR
This critical vulnerability in Android's audio decoder allows remote attackers to execute arbitrary code without user interaction by exploiting an out-of-bounds write. It affects Android devices, particularly Google Pixel phones, and can be exploited remotely with no privileges required.
💻 Affected Systems
- Android
- Google Pixel devices
📦 What is this software?
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Full device compromise leading to data theft, persistent backdoor installation, or device takeover for botnet participation.
Likely Case
Remote code execution allowing data exfiltration, surveillance, or ransomware deployment on vulnerable devices.
If Mitigated
Limited impact if patched promptly; unpatched devices remain fully vulnerable to remote exploitation.
🎯 Exploit Status
No authentication or user interaction required; remote exploitation is straightforward once exploit details are known.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: December 2025 Android security update
Vendor Advisory: https://source.android.com/security/bulletin/pixel/2025-12-01
Restart Required: Yes
Instructions:
1. Check for system updates in Settings > System > System update. 2. Install December 2025 Android security update. 3. Restart device after installation.
🔧 Temporary Workarounds
Disable vulnerable audio services
androidTemporarily disable audio decoder services to prevent exploitation
adb shell pm disable com.android.audio.service
adb shell pm disable-user --user 0 com.android.audio.decoder
🧯 If You Can't Patch
- Network segmentation: Isolate vulnerable devices from untrusted networks
- Application control: Block suspicious audio file processing applications
🔍 How to Verify
Check if Vulnerable:
Check Android security patch level in Settings > About phone > Android version > Security updateCheck Version:
adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Verify security patch level shows 'December 1, 2025' or later📡 Detection & Monitoring
Log Indicators:
- AudioDecoder crash logs
- SIGSEGV in audio_decoder process
- Unusual audio file processing
Network Indicators:
- Malicious audio file downloads
- Unexpected network connections from audio services
SIEM Query:
process_name:"audio_decoder" AND (event_type:crash OR exit_code:139)