---
id: CVE-2026-20478
title: >-
  In Audio HAL, there is a possible out of bounds write due to a heap buffer
  overflow
summary: >-
  In Audio HAL, there is a possible out of bounds write due to a heap buffer
  overflow. This could lead to local denial of service with User execution
  privileges needed. User interaction is not needed for exploitation. Patch ID:
  ALPS1098145…
severity: none
cwe:
  - CWE-787
published: '2026-08-03'
updated: '2026-08-03'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-20478'
references:
  - url: 'https://www.mediatek.com/product-security-bulletin/August-2026'
    label: security@mediatek.com
tags:
  - nvd
ingestedAt: '2026-08-03T06:23:47.494Z'
epss: 0.00145
epssPercentile: 0.03112
---

## Overview

In Audio HAL, there is a possible out of bounds write due to a heap buffer overflow. This could lead to local denial of service with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS10981454 (Note: For MT6880, MT6890, MT6988, MT6990) / AUTO00851293 (Note: For MT2735, MT2737); Issue ID: MSV-7638.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.