CVE-2024-21476
📋 TL;DR
CVE-2024-21476 is a memory corruption vulnerability in Qualcomm components where improper validation of user-supplied channel IDs can lead to arbitrary code execution. This affects devices using vulnerable Qualcomm chipsets, potentially allowing attackers to compromise device integrity and confidentiality.
💻 Affected Systems
- Qualcomm chipsets and associated firmware
📦 What is this software?
Snapdragon 865 5g Mobile Firmware by Qualcomm
Snapdragon 865 5g Mobile Firmware by Qualcomm
Snapdragon 870 5g Mobile Firmware by Qualcomm
Snapdragon 888 5g Mobile Firmware by Qualcomm
Snapdragon 888 5g Mobile Firmware by Qualcomm
Snapdragon X55 5g Modem Rf Firmware by Qualcomm
View all CVEs affecting Snapdragon X55 5g Modem Rf Firmware →
Snapdragon Xr2\+ Gen 1 Firmware by Qualcomm
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with kernel privileges leading to complete device compromise, data theft, and persistent backdoor installation.
Likely Case
Local privilege escalation allowing attackers to gain elevated permissions and access sensitive system resources.
If Mitigated
Denial of service or application crash if memory corruption is contained within sandboxed environments.
🎯 Exploit Status
Requires local access or ability to execute code; exploitation depends on specific memory layout and mitigations.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Patches included in Qualcomm's May 2024 security updates
Vendor Advisory: https://docs.qualcomm.com/product/publicresources/securitybulletin/may-2024-bulletin.html
Restart Required: Yes
Instructions:
1. Check with device manufacturer for available security updates. 2. Apply Qualcomm-provided firmware patches. 3. Reboot device after patch installation.
🔧 Temporary Workarounds
Restrict local code execution
allLimit ability for untrusted applications to execute code or access system components
🧯 If You Can't Patch
- Isolate affected devices from critical networks and sensitive data
- Implement application allowlisting to prevent unauthorized code execution
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against Qualcomm's security bulletin; examine chipset version and patch levelCheck Version:
Device-specific commands vary by manufacturer; generally check Settings > About Phone > Build NumberVerify Fix Applied:
Verify firmware version has been updated to include May 2024 Qualcomm security patches📡 Detection & Monitoring
Log Indicators:
- Unexpected process crashes in Qualcomm components
- Memory access violation logs
- Kernel panic or system instability
Network Indicators:
- Unusual local process communication patterns
- Suspicious inter-process communication
SIEM Query:
Process: (name contains "qcom" OR "qualcomm") AND (event_type: crash OR memory_violation)