CVE-2025-20723: mt6835 Memory Corruption — Fix

Description

In gnss driver, there is a possible out of bounds write due to an incorrect bounds check. 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: ALPS09920033; Issue ID: MSV-3797.

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CVSS v3.1 Score

7.8

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/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	mt6835	All
mediatek	mt6878	All
mediatek	mt6886	All
mediatek	mt6897	All
mediatek	mt6899	All
mediatek	mt6985	All
mediatek	mt6989	All
mediatek	mt6991	All
mediatek	mt8676	All
mediatek	mt8678	All
mediatek	mt8775	All
mediatek	mt8791t	All
mediatek	mt8796	All
mediatek	mt8873	All

References

Advisories & Patches

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

Frequently Asked Questions

What is CVE-2025-20723? +

In gnss driver, there is a possible out of bounds write due to an incorrect bounds check. 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: ALPS09920033; Issue ID: MSV-3797. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2025-20723? +

CVE-2025-20723 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-20723? +

CVE-2025-20723 affects products from google, mediatek, specifically: android, mt6835, mt6878, mt6886, mt6897, mt6899, mt6985, mt6989, mt6991, mt8676, mt8678, mt8775, mt8791t, mt8796, mt8873. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-20723? +

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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