CVE-2026-20491
Received Received - Intake

Out of Bounds Write in Mediatek MTK Platform

Publication date: 2026-08-03

Last updated on: 2026-08-03

Assigner: MediaTek, Inc.

Description
In med, there is a possible out of bounds write due to an incorrect bounds check. This could lead to local denial of service with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS10981478 (Note: For MT6890, MT6990, MT6988) / AUTO00851173 (Note: For MT2735, MT2737); Issue ID: MSV-7652.

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Meta Information

Published
2026-08-03
Last Modified
2026-08-03
Generated
2026-08-03
AI Q&A
2026-08-03
EPSS Evaluated
N/A
NVD
CVE-2026-20491
EUVD
EUVD-2026-52081

Affected Vendors & Products

Showing 5 associated CPEs
Vendor Product Version / Range
mediatek mt6890 *
mediatek mt6990 *
mediatek mt6988 *
mediatek mt2735 *
mediatek mt2737 *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-787 The product writes data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

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Executive Summary

This vulnerability is an out of bounds write issue in the med component due to incorrect bounds checking. It allows local denial of service with user execution privileges required but no user interaction needed for exploitation.

Impact Analysis

An attacker could exploit this to cause a denial of service on your device, potentially crashing applications or the system itself. Since it requires user execution privileges, it may be used after gaining some access to your device.

Compliance Impact

The vulnerability is a local denial of service issue with user execution privileges required but no user interaction needed. It does not specify data exposure or privacy impacts, so direct effects on GDPR or HIPAA compliance are unclear without further context.

Mitigation Strategies

Apply the provided patches: ALPS10981478 for MT6890, MT6990, MT6988 or AUTO00851173 for MT2735, MT2737. Ensure the patches are installed to fix the incorrect bounds check causing the out of bounds write.

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