CVE-2025-20657: mt6765 Memory Corruption — Fix

Description

In vdec, there is a possible permission bypass due to improper input validation. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS09486425; Issue ID: MSV-2609.

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CVSS v3.1 Score

6.7

MEDIUM

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

Weakness Type (CWE)

CWE-787 Out-of-bounds Write

Affected Products

Vendor	Product	Versions
google	android	All
google	android	All
mediatek	mt6765	All
mediatek	mt6768	All
mediatek	mt6781	All
mediatek	mt6789	All
mediatek	mt6833	All
mediatek	mt6853	All
mediatek	mt6877	All
mediatek	mt6885	All
mediatek	mt8768	All
mediatek	mt8771	All
mediatek	mt8781	All
mediatek	mt8786	All
mediatek	mt8791t	All

References

Advisories & Patches

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

Frequently Asked Questions

What is CVE-2025-20657? +

In vdec, there is a possible permission bypass due to improper input validation. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS09486425; Issue ID: MSV-2609. It has a CVSS v3.1 base score of 6.7 (MEDIUM).

How severe is CVE-2025-20657? +

CVE-2025-20657 has a CVSS v3.1 score of 6.7 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-2025-20657? +

CVE-2025-20657 affects products from google, mediatek, specifically: android, mt6765, mt6768, mt6781, mt6789, mt6833, mt6853, mt6877, mt6885, mt8768, mt8771, mt8781, mt8786, mt8791t. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-20657? +

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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