CVE-2025-20746: rdk-b Stack Overflow — Fix

Description

In gnss service, 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: ALPS10010441; Issue ID: MSV-3967.

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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-121 CWE-121

CWE-787 Out-of-bounds Write

Affected Products

Vendor	Product	Versions
linuxfoundation	yocto	All
rdkcentral	rdk-b	All
google	android	All
google	android	All
openwrt	openwrt	All
openwrt	openwrt	All
zephyrproject	zephyr	All
mediatek	mt2718	All
mediatek	mt2737	All
mediatek	mt6835	All
mediatek	mt6878	All
mediatek	mt6886	All
mediatek	mt6897	All
mediatek	mt6899	All
mediatek	mt6982	All
mediatek	mt6985	All
mediatek	mt6986	All
mediatek	mt6986d	All
mediatek	mt6989	All
mediatek	mt6990	All
mediatek	mt6991	All
mediatek	mt8676	All
mediatek	mt8678	All
mediatek	mt8755	All
mediatek	mt8893	All

References

Advisories & Patches

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

Frequently Asked Questions

What is CVE-2025-20746? +

In gnss service, 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: ALPS10010441; Issue ID: MSV-3967. It has a CVSS v3.1 base score of 6.7 (MEDIUM).

How severe is CVE-2025-20746? +

CVE-2025-20746 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-2025-20746? +

CVE-2025-20746 affects products from google, linuxfoundation, mediatek, openwrt, rdkcentral, zephyrproject, specifically: android, mt2718, mt2737, mt6835, mt6878, mt6886, mt6897, mt6899, mt6982, mt6985, mt6986, mt6986d, mt6989, mt6990, mt6991, mt8676, mt8678, mt8755, mt8893, openwrt, rdk-b, yocto, zephyr. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-20746? +

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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