CVE-2026-20579
Received Received - Intake

Out of Bounds Write in vdec Due to Type Confusion

Vulnerability report for CVE-2026-20579, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-10-05

Last updated on: 2026-10-05

Assigner: MediaTek, Inc.

Description

In vdec, there is a possible out of bounds write due to type confusion. 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: ALPS11383899; Issue ID: MSV-9800.

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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
EUVD

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
mediatek vdec From ALPS11383899 (exc)

Helpful Resources

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.

Attack-Flow Graph

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Executive Summary

This vulnerability is a type confusion issue in the vdec component that could lead to an out of bounds write. It allows local privilege escalation if an attacker already has System privilege access. Exploitation does not require user interaction.

Impact Analysis

If you are a user with System privilege access, an attacker could exploit this to gain higher privileges, potentially leading to full control over the affected system. This could result in unauthorized data access, system manipulation, or further attacks.

Compliance Impact

The provided CVE data does not specify any direct impact on compliance with standards like GDPR or HIPAA. The vulnerability involves a possible out of bounds write due to type confusion in vdec, which could lead to local privilege escalation if System privilege is already obtained. No user interaction is needed for exploitation.

Mitigation Strategies

Apply the patch provided by MediaTek with Patch ID ALPS11383899 to address the out of bounds write issue in vdec. Ensure the System privilege is not granted to untrusted actors to prevent potential exploitation.

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