CVE-2026-20533

Analyzed Analyzed - Analysis Complete

Integer Overflow Leading to Privilege Escalation in MediaTek Display

Publication date: 2026-10-05

Last updated on: 2026-10-09

Assigner: MediaTek, Inc.

Description

In display, there is a possible escalation of privilege due to an integer overflow. 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: ALPS11296678; Issue ID: MSV-9167.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-10-05

Last Modified

2026-10-09

Generated

2026-10-19

AI Q&A

2026-10-05

EPSS Evaluated

2026-10-18

NVD

CVE-2026-20533

EUVD

EUVD-2026-92190

Affected Vendors & Products

Vendor	Product	Version / Range
mediatek	mt6739_firmware	*
mediatek	mt6761_firmware	*
mediatek	mt6765_firmware	*
mediatek	mt6768_firmware	*
mediatek	mt6781_firmware	*
mediatek	mt6789_firmware	*
mediatek	mt6833_firmware	*
mediatek	mt6835_firmware	*
mediatek	mt6853_firmware	*
mediatek	mt6855_firmware	*
mediatek	mt6858_firmware	*
mediatek	mt6877_firmware	*
mediatek	mt6878_firmware	*
mediatek	mt6879_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	mt8171_firmware	*
mediatek	mt8188_firmware	*
mediatek	mt8668_firmware	*
mediatek	mt8676_firmware	*
mediatek	mt8678_firmware	*
mediatek	mt8793_firmware	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-190	The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

Attack-Flow Graph

Executive Summary

This vulnerability is an integer overflow in the display component that could allow an attacker with System privilege to escalate privileges further. Exploitation does not require user interaction.

Detection Guidance

This vulnerability requires specific MediaTek chipset firmware inspection. Check for MediaTek display driver versions and look for integer overflow patterns in display-related processes. No direct commands are provided in the CVE details.

Impact Analysis

If you are a user with System privilege access, an attacker could exploit this to gain higher privileges, potentially leading to full system compromise or unauthorized actions.

Compliance Impact

This vulnerability involves a possible escalation of privilege due to an integer overflow in display components. If exploited, it could allow a malicious actor with System privilege to gain further unauthorized access. This may impact compliance with standards like GDPR or HIPAA by potentially enabling unauthorized data access or modification, though specific compliance impacts depend on system configuration and data handling practices.

Mitigation Strategies

Apply the patch identified as ALPS11296678 to address the integer overflow issue in the display component. Ensure the System privilege is not granted to untrusted actors to prevent potential escalation of privilege.

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