CVE-2025-36927
📋 TL;DR
This vulnerability allows local privilege escalation on affected Android devices through an out-of-bounds write in the Tachyon component. Attackers can exploit this without user interaction or additional permissions to gain elevated privileges. Primarily affects Google Pixel devices running vulnerable Android versions.
💻 Affected Systems
- Google Pixel devices
📦 What is this software?
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing attackers to execute arbitrary code with system privileges, install persistent malware, access all user data, and bypass security controls.
Likely Case
Local attackers or malicious apps escalate privileges to perform unauthorized actions, access sensitive data, or maintain persistence on the device.
If Mitigated
Limited impact with proper patch management and security controls; isolated privilege escalation attempts detected and contained.
🎯 Exploit Status
Requires local access but no user interaction; exploitation likely requires understanding of Android kernel and Tachyon component internals.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: December 2025 Android security patch or later
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 security patch. 3. Reboot device after installation completes.
🔧 Temporary Workarounds
Disable unnecessary system components
androidReduce attack surface by disabling unused system services and components
Application sandboxing
androidUse Android's built-in app sandboxing and permission controls to limit potential damage
🧯 If You Can't Patch
- Isolate affected devices from sensitive networks and data
- Implement strict application whitelisting and monitor for suspicious privilege escalation attempts
🔍 How to Verify
Check if Vulnerable:
Check Android security patch level in Settings > About phone > Android version > Security patch levelCheck Version:
adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Verify security patch level shows December 2025 or later date📡 Detection & Monitoring
Log Indicators:
- Unexpected privilege escalation events in system logs
- Abnormal Tachyon component activity
- SELinux/AppArmor denials related to system components
Network Indicators:
- Unusual local network traffic from system processes
- Suspicious inter-process communication patterns
SIEM Query:
source="android_system" AND (event_type="privilege_escalation" OR component="tachyon") AND severity=HIGH