CVE-2015-9195
📋 TL;DR
This vulnerability allows attackers to execute arbitrary code on affected Android devices through a buffer overflow in Qualcomm's QTEE syscall handler. It affects Android devices with specific Qualcomm Snapdragon chipsets before the April 2018 security patch. Attackers can potentially gain full control of the device.
💻 Affected Systems
- Android devices with Qualcomm Snapdragon MDM9625, MDM9635M, MDM9650, MDM9655, SD 400, SD 410/12, SD 615/16/SD 415, SD 617, SD 650/52, SD 808, SD 810, SDX20 chipsets
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing remote code execution, data theft, persistent backdoor installation, and device takeover.
Likely Case
Local privilege escalation allowing malware to gain root access and bypass security controls.
If Mitigated
No impact if patched; limited impact if device has strong app sandboxing and exploit mitigations.
🎯 Exploit Status
Requires local access or ability to execute code on device; buffer overflow exploitation requires specific knowledge of QTEE syscall handler.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Android security patch level April 5, 2018 or later
Vendor Advisory: https://source.android.com/security/bulletin/2018-04-01
Restart Required: Yes
Instructions:
1. Check for system updates in Settings > System > System update. 2. Install April 2018 or later security patch. 3. Restart device. 4. Verify patch installation in Settings > About phone > Android security patch level.
🔧 Temporary Workarounds
Disable unnecessary system components
androidReduce attack surface by disabling unused system services and features
🧯 If You Can't Patch
- Isolate affected devices from critical networks and sensitive data
- Implement strict app installation policies and mobile device management controls
🔍 How to Verify
Check if Vulnerable:
Check Android security patch level in Settings > About phone > Android security patch level. If date is before April 2018, device is vulnerable.Check Version:
adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Verify Android security patch level shows April 2018 or later date.📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- QTEE syscall handler crash logs
- Unexpected privilege escalation attempts
Network Indicators:
- Unusual outbound connections from system processes
- Suspicious network activity from elevated privileges
SIEM Query:
source="android_logs" AND ("QTEE" OR "syscall" OR "buffer overflow")