CVE-2024-53833
📋 TL;DR
This vulnerability allows local attackers to write beyond allocated memory boundaries in the Android kernel's lwis_transaction.c component, potentially leading to privilege escalation without requiring user interaction. It affects Android devices, particularly Google Pixel phones, where an attacker with local access could gain elevated privileges.
💻 Affected Systems
- Google Pixel phones
- Android devices with affected kernel versions
📦 What is this software?
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with kernel-level access, allowing attackers to install persistent malware, access all user data, or disable security controls.
Likely Case
Local privilege escalation allowing attackers to bypass application sandboxes, access sensitive system resources, or install malicious applications with elevated permissions.
If Mitigated
Limited impact with proper kernel hardening, SELinux policies, and regular security updates preventing successful exploitation.
🎯 Exploit Status
Requires local access and knowledge of kernel memory layout. No user interaction needed, but exploitation requires bypassing kernel protections like KASLR.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: December 2024 Android security patch or later
Vendor Advisory: https://source.android.com/security/bulletin/pixel/2024-12-01
Restart Required: Yes
Instructions:
1. Check for system updates in Settings > System > System update. 2. Install December 2024 security patch or later. 3. Reboot device to apply kernel patch.
🔧 Temporary Workarounds
Restrict local access
allLimit physical and network access to vulnerable devices to reduce attack surface
🧯 If You Can't Patch
- Implement strict application vetting and installation controls
- Enable enhanced SELinux policies and kernel hardening features
🔍 How to Verify
Check if Vulnerable:
Check Android security patch level in Settings > About phone > Android version > Build number. If before December 2024, device is vulnerable.Check Version:
adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Verify security patch level shows December 2024 or later after update installation.📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- SELinux denials related to lwis_transaction
- Unexpected privilege escalation attempts
Network Indicators:
- None - this is a local exploit
SIEM Query:
source="android_kernel" AND (event="kernel_panic" OR event="oops") AND component="lwis"