CVE-2026-20501
Received Received - Intake

Heap Buffer Overflow in vdec Leading to Privilege Escalation

Vulnerability report for CVE-2026-20501, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-09-07

Last updated on: 2026-09-07

Assigner: MediaTek, Inc.

Description

In vdec, there is a possible out of bounds write due to a heap buffer overflow. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS11262030; Issue ID: MSV-9197.

CVSS Scores

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Meta Information

Published
2026-09-07
Last Modified
2026-09-07
Generated
2026-09-07
AI Q&A
2026-09-07
EPSS Evaluated
N/A
NVD
EUVD

Affected Vendors & Products

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

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-122 A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

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Executive Summary

This is a heap buffer overflow vulnerability in the vdec component. It allows an out of bounds write, which could lead to local privilege escalation. Exploitation does not require user interaction or additional execution privileges.

Impact Analysis

An attacker could exploit this to gain elevated privileges on your system. Since no user interaction is needed, it could be triggered remotely or locally, potentially allowing full control of the affected device.

Compliance Impact

The provided CVE data does not specify any direct impact on compliance with standards like GDPR or HIPAA. The vulnerability involves a heap buffer overflow in vdec that could lead to local privilege escalation, but no details are given about data exposure or regulatory implications.

Mitigation Strategies

Apply the patch identified as ALPS11262030 to address the heap buffer overflow in vdec. Ensure the update is applied to all affected systems to prevent local privilege escalation.

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