CVE-2020-11246
📋 TL;DR
A double free vulnerability in Qualcomm Snapdragon chipsets allows attackers to potentially execute arbitrary code or cause denial of service when devices enter suspend mode during secure playback. This affects multiple Snapdragon platforms including Auto, Compute, Connectivity, Consumer IoT, Industrial IoT, and Mobile. Attackers could exploit this to compromise device integrity or stability.
💻 Affected Systems
- Snapdragon Auto
- Snapdragon Compute
- Snapdragon Connectivity
- Snapdragon Consumer IOT
- Snapdragon Industrial IOT
- Snapdragon Mobile
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, data theft, or persistent backdoor installation
Likely Case
Device crash or reboot causing denial of service, potentially leading to temporary loss of functionality
If Mitigated
Limited impact with proper memory protections and exploit mitigations in place
🎯 Exploit Status
Exploitation requires precise timing during suspend mode transition and knowledge of secure playback mechanisms; no public exploits known
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Firmware/driver updates released in April 2021 security bulletin
Vendor Advisory: https://www.qualcomm.com/company/product-security/bulletins/april-2021-bulletin
Restart Required: Yes
Instructions:
1. Check device manufacturer for firmware updates. 2. Apply Qualcomm-provided patches through OEM update channels. 3. Reboot device after update installation. 4. Verify patch application through version checks.
🔧 Temporary Workarounds
Disable secure playback
allPrevent use of secure playback features that trigger the vulnerability
Device-specific configuration changes required; consult manufacturer documentation
Prevent suspend during media playback
linuxConfigure devices to avoid entering suspend mode during media playback
echo 0 > /sys/power/autosuspend_delay_ms (Linux-based systems)
adb shell settings put global stay_on_while_plugged_in 7 (Android)
🧯 If You Can't Patch
- Isolate affected devices from untrusted networks and media sources
- Implement strict application control to prevent untrusted apps from triggering secure playback
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against manufacturer's patched versions; examine /proc/version or build properties for chipset detailsCheck Version:
cat /proc/version | grep -i qualcomm || getprop ro.bootloader || dmesg | grep -i qualcommVerify Fix Applied:
Confirm firmware version includes April 2021 or later security patches; check with manufacturer for specific patch verification📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- Double free detection in kernel logs
- Unexpected device reboots during media playback
- Secure playback session failures
Network Indicators:
- Unusual media streaming patterns triggering device state changes
- Suspicious media files designed to trigger suspend mode
SIEM Query:
source="kernel" AND ("double free" OR "panic" OR "suspend") AND ("secure" OR "playback" OR "media")