CVE-2026-20521

Analyzed Analyzed - Analysis Complete

Video HAL Privilege Escalation Vulnerability

Publication date: 2026-10-05

Last updated on: 2026-10-08

Assigner: MediaTek, Inc.

Description

In Video HAL, there is a possible escalation of privilege 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: ALPS11375674; Issue ID: MSV-9571.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-10-05

Last Modified

2026-10-08

Generated

2026-10-19

AI Q&A

2026-10-05

EPSS Evaluated

2026-10-18

NVD

CVE-2026-20521

EUVD

EUVD-2026-92206

Affected Vendors & Products

Vendor	Product	Version / Range
mediatek	mt8910_firmware	*
mediatek	mt2718_firmware	*
mediatek	mt6768_firmware	*
mediatek	mt6769_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	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	mt8695_firmware	*
mediatek	mt8696_firmware	*
mediatek	mt8781_firmware	*
mediatek	mt8788e_firmware	*
mediatek	mt8792_firmware	*
mediatek	mt8793_firmware	*
mediatek	mt8799_firmware	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-121	A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).

Attack-Flow Graph

Executive Summary

This vulnerability is in Video HAL, a component that handles video processing. It allows an attacker to escalate privileges due to a missing bounds check, meaning the system fails to verify if an operation stays within allowed memory limits. This could let a local attacker gain higher privileges without needing extra permissions or user interaction.

Impact Analysis

If exploited, this vulnerability could allow an attacker to take control of your device or gain elevated privileges. Since no additional permissions or user interaction are needed, it poses a risk to the security and integrity of your system. Attackers could access sensitive data or install malicious software.

Compliance Impact

This vulnerability involves a missing bounds check in Video HAL, potentially leading to local privilege escalation. While it does not directly impact data protection standards like GDPR or HIPAA, such vulnerabilities could indirectly affect compliance by enabling unauthorized access to systems handling sensitive data.

Mitigation Strategies

Apply the patch identified as ALPS11375674 to Video HAL to address the missing bounds check. Ensure the update is installed on all affected systems to prevent potential privilege escalation.

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