CVE-2025-20695: mt6639 Memory Corruption — Fix

Description

In Bluetooth FW, there is a possible system crash due to an uncaught exception. This could lead to remote denial of service with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS09741871; Issue ID: MSV-3317.

Is your site exposed to CVE-2025-20695?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

6.5

MEDIUM

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

Weakness Type (CWE)

CWE-124 CWE-124

CWE-787 Out-of-bounds Write

Affected Products

Vendor	Product	Versions
mediatek	software_development_kit	< 3.7
google	android	All
google	android	All
google	android	All
openwrt	openwrt	All
openwrt	openwrt	All
mediatek	mt6639	All
mediatek	mt6653	All
mediatek	mt6985	All
mediatek	mt6989	All
mediatek	mt6990	All
mediatek	mt6991	All
mediatek	mt7925	All
mediatek	mt7927	All
mediatek	mt8196	All
mediatek	mt8678	All
mediatek	mt8796	All

References

Advisories & Patches

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

Frequently Asked Questions

What is CVE-2025-20695? +

In Bluetooth FW, there is a possible system crash due to an uncaught exception. This could lead to remote denial of service with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS09741871; Issue ID: MSV-3317. It has a CVSS v3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2025-20695? +

CVE-2025-20695 has a CVSS v3.1 score of 6.5 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-2025-20695? +

CVE-2025-20695 affects products from google, mediatek, openwrt, specifically: android, mt6639, mt6653, mt6985, mt6989, mt6990, mt6991, mt7925, mt7927, mt8196, mt8678, mt8796, openwrt, software_development_kit. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-20695? +

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.

Related Vulnerabilities

CVE-2026-16439

In Eclipse OpenJ9 versions up to 0.60, using -Xtrace to trace method arguments can lead to buffer underflow.

CVE-2024-36343

Improper input validation in the System Management Mode (SMM) communications buffer could allow a privileged attacker to perform an out …

CVE-2026-26199

HDF5 is a high-performance library and a file format specification that implements the HDF5 data model. If `H5Iget_name` is invoked …

CVE-2026-44631 9.8

Buffer Underwrite vulnerability in Apache HTTP Server on crafted regular expressions in the configuration. This issue affects Apache HTTP Server: …

CVE-2023-25610 9.8

A buffer underwrite ('buffer underflow') vulnerability in the administrative interface of Fortinet FortiOS version 7.2.0 through 7.2.3, version 7.0.0 through …

CVE-2025-27439 8.5

Buffer underflow in some Zoom Workplace Apps may allow an authenticated user to conduct an escalation of privilege via network …

CVE-2025-20695