CVE-2026-20521
Received Received - Intake

Video HAL Privilege Escalation Vulnerability

Publication date: 2026-10-05

Last updated on: 2026-10-05

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.

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Meta Information

Published
2026-10-05
Last Modified
2026-10-05
Generated
2026-10-05
AI Q&A
2026-10-05
EPSS Evaluated
N/A
NVD
CVE-2026-20521
EUVD
EUVD-2026-92206

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
mediatek video_hal *

Helpful Resources

Exploitability

CWE
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KEV
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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).

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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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