CVE-2024-27204
📋 TL;DR
CVE-2024-27204 is an out-of-bounds write vulnerability in the tmu_set_gov_active function of tmu.c in Android's Pixel kernel. This allows local attackers to escalate privileges without user interaction or additional execution privileges. The vulnerability affects Google Pixel devices running vulnerable kernel versions.
💻 Affected Systems
- Google Pixel smartphones
📦 What is this software?
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with root-level access, allowing attackers to install persistent malware, access all user data, and bypass security controls.
Likely Case
Local privilege escalation enabling attackers to gain elevated permissions, potentially leading to data theft, surveillance, or further system exploitation.
If Mitigated
Limited impact with proper kernel hardening, SELinux policies, and timely patching, though the vulnerability still provides a foothold for skilled attackers.
🎯 Exploit Status
Requires local access to the device but no user interaction; exploitation involves kernel memory manipulation which requires technical expertise.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: March 2024 Android security patch level or later
Vendor Advisory: https://source.android.com/security/bulletin/pixel/2024-03-01
Restart Required: Yes
Instructions:
1. Check for system updates in Settings > System > System update. 2. Download and install the March 2024 security patch. 3. Reboot the device after installation completes.
🔧 Temporary Workarounds
Restrict physical and remote access
allLimit who has physical access to devices and ensure remote access is properly secured with strong authentication.
🧯 If You Can't Patch
- Isolate vulnerable devices from critical networks and data
- Implement strict access controls and monitor for suspicious local activity
🔍 How to Verify
Check if Vulnerable:
Check Android security patch level in Settings > About phone > Android version. If patch level is earlier than March 2024, the device is likely vulnerable.Check Version:
adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Verify the security patch level shows March 2024 or later after applying the update.📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- SELinux denials related to tmu operations
- Unexpected privilege escalation attempts
Network Indicators:
- Unusual outbound connections from privileged processes
SIEM Query:
source="android_kernel" AND (event_type="panic" OR event_type="oops") AND process="tmu"