CVE-2025-20764: mt6739 Memory Corruption — Fix

Description

In smi, there is a possible out of bounds write due to a missing 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: ALPS10259774; Issue ID: MSV-5029.

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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
google	android	All
mediatek	mt6739	All
mediatek	mt6761	All
mediatek	mt6765	All
mediatek	mt6768	All
mediatek	mt6781	All
mediatek	mt6789	All
mediatek	mt6833	All
mediatek	mt6835	All
mediatek	mt6853	All
mediatek	mt6855	All
mediatek	mt6877	All
mediatek	mt6878	All
mediatek	mt6879	All
mediatek	mt6883	All
mediatek	mt6885	All
mediatek	mt6886	All
mediatek	mt6889	All
mediatek	mt6893	All
mediatek	mt6895	All
mediatek	mt6897	All
mediatek	mt6899	All
mediatek	mt6983	All
mediatek	mt6985	All
mediatek	mt6989	All
mediatek	mt6991	All
mediatek	mt8196	All
mediatek	mt8676	All
mediatek	mt8678	All
mediatek	mt8792	All
mediatek	mt8793	All
mediatek	mt8796	All
mediatek	mt8873	All
mediatek	mt8893	All

References

Advisories & Patches

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

Frequently Asked Questions

What is CVE-2025-20764? +

In smi, there is a possible out of bounds write due to a missing 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: ALPS10259774; Issue ID: MSV-5029. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2025-20764? +

CVE-2025-20764 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-2025-20764? +

CVE-2025-20764 affects products from google, mediatek, specifically: android, mt6739, mt6761, mt6765, mt6768, mt6781, mt6789, mt6833, mt6835, mt6853, mt6855, mt6877, mt6878, mt6879, mt6883, mt6885, mt6886, mt6889, mt6893, mt6895, mt6897, mt6899, mt6983, mt6985, mt6989, mt6991, mt8196, mt8676, mt8678, mt8792, mt8793, mt8796, mt8873, mt8893. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-20764? +

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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