CVE-2025-20687: mt7902 Out-of-bounds Read — Fix

Description

In Bluetooth driver, there is a possible out of bounds read due to an incorrect bounds check. This could lead to local denial of service with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00418045; Issue ID: MSV-3481.

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CVSS v3.1 Score

5.5

MEDIUM

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

Weakness Type (CWE)

CWE-125 Out-of-bounds Read

Affected Products

Vendor	Product	Versions
mediatek	nbiot_sdk	< 3.6
mediatek	mt7902	All
mediatek	mt7920	All
mediatek	mt7921	All
mediatek	mt7922	All
mediatek	mt7925	All
mediatek	mt7927	All

References

Advisories & Patches

https://corp.mediatek.com/product-security-bulletin/July-2025

Frequently Asked Questions

What is CVE-2025-20687? +

In Bluetooth driver, there is a possible out of bounds read due to an incorrect bounds check. This could lead to local denial of service with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00418045; Issue ID: MSV-3481. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2025-20687? +

CVE-2025-20687 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-20687? +

CVE-2025-20687 affects products from mediatek, specifically: mt7902, mt7920, mt7921, mt7922, mt7925, mt7927, nbiot_sdk. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-20687? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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