CVE-2021-30262
📋 TL;DR
This vulnerability allows improper memory access due to improper socket state validation in Qualcomm Snapdragon chipsets. Attackers could potentially execute arbitrary code or cause denial of service on affected devices. It impacts various Snapdragon platforms including automotive, mobile, IoT, and wearable devices.
💻 Affected Systems
- Snapdragon Auto
- Snapdragon Compute
- Snapdragon Connectivity
- Snapdragon Consumer IOT
- Snapdragon Industrial IOT
- Snapdragon Mobile
- Snapdragon Voice & Music
- Snapdragon Wearables
📦 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
Denial of service causing device crashes or instability, potentially requiring reboot.
If Mitigated
Limited impact with proper network segmentation and exploit mitigations in place.
🎯 Exploit Status
Exploitation requires sending malformed socket events to trigger the memory access issue. No public exploit code available as of knowledge cutoff.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to device manufacturer updates; Qualcomm provides patches to OEMs.
Vendor Advisory: https://www.qualcomm.com/company/product-security/bulletins/december-2021-bulletin
Restart Required: Yes
Instructions:
1. Check with device manufacturer for security updates. 2. Apply firmware/OS updates from manufacturer. 3. Reboot device after update installation.
🔧 Temporary Workarounds
Network Segmentation
allIsolate affected devices from untrusted networks to reduce attack surface.
Disable Unnecessary Services
linuxDisable network services that use vulnerable socket functionality if not required.
🧯 If You Can't Patch
- Implement strict network access controls to limit exposure to vulnerable devices.
- Monitor for abnormal device behavior or crashes that might indicate exploitation attempts.
🔍 How to Verify
Check if Vulnerable:
Check device chipset model and firmware version against Qualcomm advisory; use 'cat /proc/cpuinfo' on Linux devices to identify Snapdragon chipsets.Check Version:
On Android: Settings > About Phone > Build Number; On Linux: uname -a and check manufacturer update logs.Verify Fix Applied:
Verify firmware/OS version matches patched versions from device manufacturer; check for December 2021 or later security updates.📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- Socket-related error messages
- Unexpected process crashes
Network Indicators:
- Unusual socket connection attempts to affected devices
- Traffic patterns targeting known vulnerable ports
SIEM Query:
Search for: 'kernel panic' OR 'segmentation fault' on devices with Snapdragon chipsets