CVE-2025-21466
📋 TL;DR
This vulnerability allows memory corruption when processing a private escape command in an event trigger, potentially leading to arbitrary code execution or system crashes. It affects Qualcomm products that implement the vulnerable component. Attackers could exploit this to gain elevated privileges or cause denial of service.
💻 Affected Systems
- Qualcomm chipsets and associated firmware
📦 What is this software?
Snapdragon 7c Gen 2 Compute Firmware by Qualcomm
View all CVEs affecting Snapdragon 7c Gen 2 Compute Firmware →
Snapdragon 7c\+ Gen 3 Compute Firmware by Qualcomm
View all CVEs affecting Snapdragon 7c\+ Gen 3 Compute Firmware →
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with kernel-level code execution, allowing attackers to install persistent malware, exfiltrate sensitive data, or brick devices.
Likely Case
Local privilege escalation from a lower-privileged user or app to kernel/system-level access, potentially leading to data theft or further system exploitation.
If Mitigated
System crash or denial of service without code execution if exploit fails or memory protections are in place.
🎯 Exploit Status
Exploitation likely requires local access or ability to execute code with some privileges. Memory corruption vulnerabilities often require specific conditions to achieve reliable code execution.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Qualcomm July 2025 security bulletin for specific patched versions
Vendor Advisory: https://docs.qualcomm.com/product/publicresources/securitybulletin/july-2025-bulletin.html
Restart Required: Yes
Instructions:
1. Check Qualcomm July 2025 security bulletin for affected products. 2. Obtain firmware/software updates from device manufacturer. 3. Apply updates following manufacturer instructions. 4. Reboot device to activate patches.
🔧 Temporary Workarounds
Restrict local access
allLimit physical and network access to vulnerable systems to reduce attack surface
Disable unnecessary services
allTurn off services or features that use the vulnerable event trigger mechanism if possible
🧯 If You Can't Patch
- Isolate affected systems on segmented networks with strict access controls
- Implement application allowlisting to prevent unauthorized code execution
🔍 How to Verify
Check if Vulnerable:
Check device firmware/software version against Qualcomm's July 2025 security bulletin for affected versionsCheck Version:
Device-specific commands vary; on Android: 'getprop ro.build.fingerprint' or check Settings > About phoneVerify Fix Applied:
Verify installed firmware/software version matches or exceeds patched versions listed in Qualcomm bulletin📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- Memory access violation errors
- Unexpected process crashes with privilege escalation attempts
Network Indicators:
- Unusual local network traffic from affected devices
- Attempts to access restricted system resources
SIEM Query:
source="kernel" AND ("panic" OR "segfault" OR "access violation") AND device_type="qualcomm"