CVE-2024-34726
📋 TL;DR
This vulnerability in the PowerVR graphics driver allows local attackers to execute arbitrary code in the kernel through a logic error in memory mapping. It enables privilege escalation without requiring user interaction or additional permissions. Android devices using affected PowerVR GPU drivers are primarily affected.
💻 Affected Systems
- Android devices with PowerVR GPU drivers
📦 What is this software?
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with kernel-level code execution, allowing attackers to install persistent malware, access all user data, and bypass all security controls.
Likely Case
Local privilege escalation from a compromised app to root/system privileges, enabling data theft, surveillance, and further system exploitation.
If Mitigated
Limited impact if SELinux/AppArmor policies restrict the vulnerable component or if the device has secure boot and verified boot enabled.
🎯 Exploit Status
Requires local access but no user interaction. Exploitation involves manipulating memory mapping parameters to trigger the logic error.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: July 2024 Android Security Patch Level or later
Vendor Advisory: https://source.android.com/security/bulletin/2024-07-01
Restart Required: Yes
Instructions:
1. Check for Android system updates in Settings > System > System update. 2. Apply the July 2024 security patch. 3. Reboot device. 4. Verify patch level in Settings > About phone > Android version > Security patch level.
🔧 Temporary Workarounds
Restrict vulnerable driver module
linuxDisable or restrict the PowerVR kernel module if not essential
echo 0 > /sys/module/pvrsrvkm/parameters/enable
rmmod pvrsrvkm
🧯 If You Can't Patch
- Implement strict application sandboxing and SELinux policies to limit driver access
- Monitor for suspicious kernel module activity and memory mapping operations
🔍 How to Verify
Check if Vulnerable:
Check Android security patch level: Settings > About phone > Android version > Security patch level. If before July 2024, device is vulnerable.Check Version:
getprop ro.build.version.security_patchVerify Fix Applied:
Verify security patch level shows 'July 1, 2024' or later. Check kernel logs for successful driver loading without errors.📡 Detection & Monitoring
Log Indicators:
- Unusual memory mapping operations in kernel logs
- Multiple failed mmap attempts to PowerVR driver
- Suspicious process accessing /dev/pvrsrvkm
Network Indicators:
- None - local exploitation only
SIEM Query:
source="kernel" AND "pvrsrv" AND ("mmap" OR "PVRSRV_MMap")