CVE-2026-20477
Received Received - Intake

Out of Bounds Write in MediaTek Display Driver

Publication date: 2026-08-03

Last updated on: 2026-08-03

Assigner: MediaTek, Inc.

Description
In display, 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: ALPS11009963; Issue ID: MSV-7658.

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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-2026-20477
EUVD
EUVD-2026-52066

Affected Vendors & Products

Currently, no data is known.

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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.

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Executive Summary

This vulnerability is an out of bounds write issue in the display component due to a missing bounds check. It allows local privilege escalation if an attacker already has System privilege access. Exploitation does not require user interaction.

Impact Analysis

If exploited, this vulnerability could allow an attacker with existing System privileges to gain higher privileges, potentially leading to full control over the affected system. This could enable unauthorized access to sensitive data or system functions.

Compliance Impact

This vulnerability could lead to local escalation of privilege, potentially allowing unauthorized access to sensitive data. This may impact compliance with standards like GDPR or HIPAA by increasing the risk of data breaches or unauthorized processing of personal health information.

Mitigation Strategies

Apply the patch identified as ALPS11009963 to address the missing bounds check in the display component. Ensure the System privilege is not granted to untrusted actors to prevent potential exploitation.

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