What is the CVSS score of CVE-2025-21456?

CVE-2025-21456 has a CVSS 3.1 base score of 7.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.0%.

Which versions of Ar8035 Firmware are affected by CVE-2025-21456?

CVE-2025-21456 presents notable security risk, a use-after-free vulnerability rated CVSS 7.8. Exploitation could compromise the security of affected deployments.

How to fix or mitigate CVE-2025-21456?

Within 30 days: Identify all affected systems and apply vendor patches as part of regular patch cycle. If patching is delayed, consider network segmentation to limit exposure.

Ar8035 Firmware CVE-2025-21456

HIGH

Use After Free (CWE-416)

2025-08-06 product-security@qualcomm.com

Buffer Overflow Use After Free Memory Corruption Ar8035 Firmware C V2x 9150 Firmware Fastconnect 6900 Firmware Fastconnect 7800 Firmware Qam8255p Firmware Qam8295p Firmware Qam8650p Firmware Qam8775p Firmware Qca6174a Firmware Qca6574au Firmware Qca6584au Firmware Qca6696 Firmware Qca6698aq Firmware Qca6797aq Firmware Qca8081 Firmware Qca8337 Firmware Qcc710 Firmware Qcn6224 Firmware Qcn6274 Firmware Qcs410 Firmware Qcs610 Firmware Qfw7114 Firmware Qfw7124 Firmware Sa6145p Firmware Sa6150p Firmware Sa6155p Firmware Sa7255p Firmware Sa7775p Firmware Sa8145p Firmware Sa8150p Firmware Sa8155p Firmware Sa8195p Firmware Sa8255p Firmware Sa8295p Firmware Sa8530p Firmware Sa8540p Firmware Sa8620p Firmware Sa8650p Firmware Sa8775p Firmware Sa9000p Firmware Snapdragon 888 5g Mobile Platform Firmware Snapdragon Auto 5g Modem Rf Gen 2 Firmware Snapdragon X72 5g Modem Rf System Firmware Snapdragon X75 5g Modem Rf System Firmware Sw5100 Firmware Sw5100p Firmware Video Collaboration Vc1 Platform Firmware Video Collaboration Vc3 Platform Firmware Wcd9340 Firmware Wcd9341 Firmware Wcd9370 Firmware Wcd9380 Firmware Wcd9385 Firmware Wcn3660b Firmware Wcn3680b Firmware Wcn3950 Firmware Wcn3980 Firmware Wcn3988 Firmware Wsa8810 Firmware Wsa8815 Firmware Wsa8830 Firmware Wsa8835 Firmware Snapdragon 888 5G Mobile Platform Sm8350 Ac Firmware Snapdragon W5 Gen 1 Wearable Platform Firmware

7.8

CVSS 3.1

CVSS VectorNVD

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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:05 vuln.today

CVE Published

Aug 06, 2025 - 08:15 nvd

HIGH 7.8

DescriptionNVD

Memory corruption while processing IOCTL command when multiple threads are called to map/unmap buffer concurrently.

AnalysisAI

Memory corruption while processing IOCTL command when multiple threads are called to map/unmap buffer concurrently. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified as Use After Free (CWE-416), which allows attackers to access freed memory to execute arbitrary code or crash the application. Memory corruption while processing IOCTL command when multiple threads are called to map/unmap buffer concurrently. Affected products include: Qualcomm Ar8035 Firmware, Qualcomm C-V2X 9150 Firmware, Qualcomm Fastconnect 6900 Firmware, Qualcomm Fastconnect 7800 Firmware, Qualcomm Qam8255P Firmware.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Use smart pointers or garbage-collected languages. Set pointers to NULL after freeing. Enable memory sanitizers.

CVE-2025-21456 vulnerability details – vuln.today

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Ar8035 Firmware CVE-2025-21456

CVSS VectorNVD

Lifecycle Timeline

DescriptionNVD

AnalysisAI

Technical ContextAI

RemediationAI

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External POC / Exploit Code