CVE-2025-21468

Q: What is the severity of CVE-2025-21468?

CVE-2025-21468 has a CVSS score of 7.8 (HIGH). This vulnerability allows memory corruption in Qualcomm firmware drivers when processing responses. Attackers could potentially execute arbitrary code or cause denial of service on affected devices. This affects systems using vulnerable Qualcomm components.

7.8 HIGH

📋 TL;DR

This vulnerability allows memory corruption in Qualcomm firmware drivers when processing responses. Attackers could potentially execute arbitrary code or cause denial of service on affected devices. This affects systems using vulnerable Qualcomm components.

💻 Affected Systems

Products:

Qualcomm firmware components

Versions: Specific versions not detailed in reference; check Qualcomm advisory for affected products

Operating Systems: Android, Linux-based systems using Qualcomm components

Default Config Vulnerable: ⚠️ Yes

Notes: Affects devices with Qualcomm chipsets; exact product list requires checking vendor advisory

📦 What is this software?

⚠️ Risk & Real-World Impact

🔴

Worst Case

Remote code execution leading to complete system compromise, data theft, or persistent backdoor installation.

🟠

Likely Case

System crashes, denial of service, or local privilege escalation on affected devices.

🟢

If Mitigated

Limited to denial of service if memory protections are enabled and exploit attempts are detected.

🌐 Internet-Facing: MEDIUM

🏢 Internal Only: HIGH

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ✅ No

Complexity: MEDIUM

Requires driver interaction; memory corruption vulnerabilities often lead to weaponization

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Check Qualcomm May 2025 security bulletin for specific patched versions

Vendor Advisory: https://docs.qualcomm.com/product/publicresources/securitybulletin/may-2025-bulletin.html

Restart Required: Yes

Instructions:

1. Check Qualcomm advisory for affected products. 2. Obtain firmware/driver updates from device manufacturer. 3. Apply updates following manufacturer instructions. 4. Reboot system.

🔧 Temporary Workarounds

Disable vulnerable drivers

linux

If possible, disable or blacklist the affected firmware driver modules

modprobe -r <driver_module>
echo 'blacklist <driver_module>' >> /etc/modprobe.d/blacklist.conf

🧯 If You Can't Patch

Implement strict network segmentation to isolate affected devices
Enable memory protection features like ASLR and DEP if available

🔍 How to Verify

Check if Vulnerable:

Check Qualcomm chipset version and firmware/driver versions against advisory

Check Version:

cat /proc/cpuinfo | grep -i qualcomm

Verify Fix Applied:

Verify firmware/driver version matches patched version from Qualcomm bulletin

📡 Detection & Monitoring

Log Indicators:

Kernel panic logs
Driver crash messages
Memory access violation errors

Network Indicators:

Unusual driver communication patterns
Firmware response anomalies

SIEM Query:

source="kernel" AND ("panic" OR "oops" OR "segfault") AND driver="qualcomm"

📊 Metadata

CVE ID: CVE-2025-21468

CVSS v3 Score: 7.8 (HIGH)

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE: CWE-787

EPSS Score: 0.03% exploit probability (6.5th percentile)

Published: May 6, 2025

Last Updated: August 11, 2025

🔗 References

https://docs.qualcomm.com/product/publicresources/securitybulletin/may-2025-bulletin.html Patch,Vendor Advisory

📋 TL;DR

💻 Affected Systems

📦 What is this software?

Ar8035 Firmware by Qualcomm

Csra6620 Firmware by Qualcomm

Csra6640 Firmware by Qualcomm

Fastconnect 6200 Firmware by Qualcomm

Fastconnect 6700 Firmware by Qualcomm

Fastconnect 6900 Firmware by Qualcomm

Fastconnect 7800 Firmware by Qualcomm

Flight Rb5 5g Firmware by Qualcomm

Mdm9628 Firmware by Qualcomm

Qam8295p Firmware by Qualcomm

Qca6174a Firmware by Qualcomm

Qca6391 Firmware by Qualcomm

Qca6564a Firmware by Qualcomm

Qca6564au Firmware by Qualcomm

Qca6574 Firmware by Qualcomm

Qca6574a Firmware by Qualcomm

Qca6574au Firmware by Qualcomm

Qca6595 Firmware by Qualcomm

Qca6595au Firmware by Qualcomm

Qca6696 Firmware by Qualcomm

Qca6698aq Firmware by Qualcomm

Qca8081 Firmware by Qualcomm

Qca8337 Firmware by Qualcomm

Qca9377 Firmware by Qualcomm

Qcm4490 Firmware by Qualcomm

Qcm5430 Firmware by Qualcomm

Qcm6490 Firmware by Qualcomm

Qcm8550 Firmware by Qualcomm

Qcn6024 Firmware by Qualcomm

Qcn9011 Firmware by Qualcomm

Qcn9012 Firmware by Qualcomm

Qcn9024 Firmware by Qualcomm

Qcn9274 Firmware by Qualcomm

Qcs410 Firmware by Qualcomm

Qcs4490 Firmware by Qualcomm

Qcs5430 Firmware by Qualcomm

Qcs610 Firmware by Qualcomm

Qcs615 Firmware by Qualcomm

Qcs6490 Firmware by Qualcomm

Qcs7230 Firmware by Qualcomm

Qcs8250 Firmware by Qualcomm

Qcs8300 Firmware by Qualcomm

Qcs8550 Firmware by Qualcomm

Qcs9100 Firmware by Qualcomm

Qmp1000 Firmware by Qualcomm

Qrb5165m Firmware by Qualcomm

Qrb5165n Firmware by Qualcomm

Qsm8350 Firmware by Qualcomm

Robotics Rb2 Firmware by Qualcomm

Robotics Rb5 Firmware by Qualcomm

Sa4150p Firmware by Qualcomm

Sa4155p Firmware by Qualcomm

Sa6145p Firmware by Qualcomm

Sa6150p Firmware by Qualcomm

Sa6155p Firmware by Qualcomm

Sa8145p Firmware by Qualcomm

Sa8150p Firmware by Qualcomm

Sa8155p Firmware by Qualcomm

Sa8195p Firmware by Qualcomm

Sa8295p Firmware by Qualcomm

Sa8530p Firmware by Qualcomm

Sa8540p Firmware by Qualcomm

Sa9000p Firmware by Qualcomm

Sd 8 Gen1 5g Firmware by Qualcomm

Sd888 Firmware by Qualcomm

Sdx61 Firmware by Qualcomm

Sg8275p Firmware by Qualcomm

Sm6370 Firmware by Qualcomm

Sm6650 Firmware by Qualcomm

Sm6650p Firmware by Qualcomm

Sm7315 Firmware by Qualcomm

Sm7325p Firmware by Qualcomm

Sm7635 Firmware by Qualcomm

Sm7675 Firmware by Qualcomm

Sm7675p Firmware by Qualcomm

Sm8550p Firmware by Qualcomm

Sm8635 Firmware by Qualcomm