CVE-2026-20475

Analyzed Analyzed - Analysis Complete

Out of Bounds Write in MediaTek Display Driver

Publication date: 2026-08-03

Last updated on: 2026-08-19

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: ALPS11004276; Issue ID: MSV-7748.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-08-03

Last Modified

2026-08-19

Generated

2026-08-23

AI Q&A

2026-08-03

EPSS Evaluated

2026-08-22

NVD

CVE-2026-20475

EUVD

EUVD-2026-52064

Affected Vendors & Products

Vendor	Product	Version / Range
mediatek	mt8910_firmware	*
mediatek	mt6991_firmware	*
mediatek	mt6993_firmware	*
mediatek	mt8126_firmware	*
mediatek	mt8171_firmware	*
mediatek	mt8188_firmware	*
mediatek	mt8189_firmware	*
mediatek	mt8367_firmware	*
mediatek	mt8668_firmware	*
mediatek	mt8676_firmware	*
mediatek	mt8678_firmware	*
mediatek	mt8766_firmware	*
mediatek	mt8768_firmware	*
mediatek	mt8781_firmware	*
mediatek	mt8786_firmware	*
mediatek	mt8791t_firmware	*
mediatek	mt8799_firmware	*

Helpful Resources

Exploitability

CWE

KEV

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

Attack-Flow Graph

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. Exploitation does not require user interaction.

Detection Guidance

This vulnerability requires System privilege access to exploit and is specific to Mediatek display components. Detection may involve checking for unauthorized privilege escalation attempts or examining display driver logs for anomalies. No specific commands are provided in the given context.

Impact Analysis

If exploited, this vulnerability could allow an attacker with System privilege to escalate their access rights locally, potentially gaining control over the affected system.

Compliance Impact

The vulnerability involves a potential out of bounds write in the display component due to missing bounds checks, which could lead to local privilege escalation if an attacker already has System privilege. This type of vulnerability does not directly impact compliance with standards like GDPR or HIPAA, as it is more related to system security and privilege management rather than data protection or privacy controls.

Mitigation Strategies

Apply the patch identified as ALPS11004276 immediately to address the missing bounds check in display. Ensure System privilege access is restricted to prevent potential local escalation of privilege.

Hi! I’m here to help you understand CVE-2026-20475. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70