CVE-2026-20502

Received Received - Intake

Out of Bounds Write in MediaTek vdec Component

Publication date: 2026-09-07

Last updated on: 2026-09-09

Assigner: MediaTek, Inc.

Description

In vdec, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS11262030; Issue ID: MSV-9196.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-09-07

Last Modified

2026-09-09

Generated

2026-09-27

AI Q&A

2026-09-07

EPSS Evaluated

2026-09-26

NVD

CVE-2026-20502

EUVD

EUVD-2026-72195

Affected Vendors & Products

Vendor	Product	Version / Range
mediatek	mt2718_firmware	*
mediatek	mt6580_firmware	*
mediatek	mt6739_firmware	*
mediatek	mt6761_firmware	*
mediatek	mt6765_firmware	*
mediatek	mt6768_firmware	*
mediatek	mt6769_firmware	*
mediatek	mt6779_firmware	*
mediatek	mt6781_firmware	*
mediatek	mt6785_firmware	*
mediatek	mt6789_firmware	*
mediatek	mt6833_firmware	*
mediatek	mt6835_firmware	*
mediatek	mt6853_firmware	*
mediatek	mt6855_firmware	*
mediatek	mt6858_firmware	*
mediatek	mt6873_firmware	*
mediatek	mt6877_firmware	*
mediatek	mt6878_firmware	*
mediatek	mt6879_firmware	*
mediatek	mt6881_firmware	*
mediatek	mt6883_firmware	*
mediatek	mt6885_firmware	*
mediatek	mt6886_firmware	*
mediatek	mt6889_firmware	*
mediatek	mt6893_firmware	*
mediatek	mt6895_firmware	*
mediatek	mt6897_firmware	*
mediatek	mt6899_firmware	*
mediatek	mt6983_firmware	*
mediatek	mt6985_firmware	*
mediatek	mt6989_firmware	*
mediatek	mt6991_firmware	*
mediatek	mt6993_firmware	*
mediatek	mt8126_firmware	*
mediatek	mt8171_firmware	*
mediatek	mt8186_firmware	*
mediatek	mt8188_firmware	*
mediatek	mt8189_firmware	*
mediatek	mt8195_firmware	*
mediatek	mt8196_firmware	*
mediatek	mt8367_firmware	*
mediatek	mt8391_firmware	*
mediatek	mt8395_firmware	*
mediatek	mt8668_firmware	*
mediatek	mt8676_firmware	*
mediatek	mt8678_firmware	*
mediatek	mt8696_firmware	*
mediatek	mt8781_firmware	*
mediatek	mt8788e_firmware	*
mediatek	mt8792_firmware	*
mediatek	mt8799_firmware	*
mediatek	mt8910_firmware	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-122	A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

Attack-Flow Graph

Executive Summary

This vulnerability is in the vdec component where a missing bounds check can lead to an out of bounds write. This issue allows local privilege escalation without needing extra execution privileges or user interaction.

Detection Guidance

The provided CVE data does not include specific detection methods or commands for identifying this vulnerability on a network or system. General best practices include checking for MediaTek chipset models listed in the vulnerability details and applying the provided patch ID ALPS11262030.

Impact Analysis

An attacker could exploit this to gain elevated privileges on your system, potentially allowing them to take control of your device or perform unauthorized actions.

Compliance Impact

The provided CVE data does not specify any direct impact on compliance with standards like GDPR or HIPAA. The vulnerability involves a possible out of bounds write in vdec, which could lead to local privilege escalation but does not mention data exposure or privacy violations relevant to these regulations.

Mitigation Strategies

Apply the patch provided by MediaTek with Patch ID ALPS11262030 to address the missing bounds check in vdec.

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