CVE-2025-47336
📋 TL;DR
This CVE describes a use-after-free vulnerability (CWE-416) in Qualcomm sensor drivers that occurs during sensor register read operations. Attackers could exploit this memory corruption to potentially execute arbitrary code or cause denial of service. This affects devices using vulnerable Qualcomm chipsets, particularly mobile devices and IoT products.
💻 Affected Systems
- Qualcomm Snapdragon mobile platforms
- Qualcomm IoT chipsets
- Devices with Qualcomm sensor subsystems
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with kernel privileges leading to complete device compromise, data theft, or persistent backdoor installation.
Likely Case
Local privilege escalation from user to kernel space, allowing attackers to bypass security controls and gain elevated access.
If Mitigated
Denial of service through kernel panic or system crash if exploit attempts fail or are blocked by security controls.
🎯 Exploit Status
Exploitation requires local access to trigger the vulnerable sensor register read operation; no public exploit code is currently available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to Qualcomm's January 2026 security bulletin for specific patched versions
Vendor Advisory: https://docs.qualcomm.com/product/publicresources/securitybulletin/january-2026-bulletin.html
Restart Required: Yes
Instructions:
1. Check Qualcomm advisory for affected chipset versions. 2. Obtain updated firmware/drivers from device manufacturer. 3. Apply patches following manufacturer's instructions. 4. Reboot device to load patched drivers.
🔧 Temporary Workarounds
Disable vulnerable sensor interfaces
linuxTemporarily disable sensor subsystems that use the vulnerable register read operations
echo 0 > /sys/class/sensors/*/enable
modprobe -r qcom_sensors
Restrict sensor access permissions
linuxLimit which users/processes can access sensor device files
chmod 600 /dev/sensors/*
setenforce 1
🧯 If You Can't Patch
- Implement strict access controls to limit which users can interact with sensor subsystems
- Monitor system logs for sensor-related crashes or unusual sensor access patterns
🔍 How to Verify
Check if Vulnerable:
Check Qualcomm chipset version and compare against advisory; examine dmesg for sensor driver version informationCheck Version:
cat /sys/class/sensors/*/version 2>/dev/null || dmesg | grep -i qualcommVerify Fix Applied:
Verify sensor driver version matches patched version from Qualcomm bulletin; test sensor functionality remains operational📡 Detection & Monitoring
Log Indicators:
- Kernel panic messages
- Use-after-free warnings in dmesg
- Sensor driver crash logs
Network Indicators:
- Unusual sensor data exfiltration patterns
SIEM Query:
source="kernel" AND ("use-after-free" OR "sensor" AND "panic")