---
id: CVE-2026-20581
title: 'In usb, there is a possible memory corruption due to use after free'
summary: >-
  In usb, there is a possible memory corruption due to use after free. 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 …
severity: medium
cvss: 6.7
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'
cvssSource: adp
cwe:
  - CWE-416
vendor: 'MediaTek, Inc.'
product: MediaTek chipset
affected:
  - mediatek_chipset MT6858
  - mediatek_chipset MT6881
  - mediatek_chipset MT6993
  - mediatek_chipset MT8188
  - mediatek_chipset MT8189
  - mediatek_chipset MT8518S
  - mediatek_chipset MT8532
  - mediatek_chipset MT8668
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-11-02T00:00:00+00:00'
published: '2026-11-02'
updated: '2026-11-03'
sourceUpdated: '2026-11-03T04:55:48.698Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-20581'
references:
  - url: 'https://www.mediatek.com/product-security-bulletin/November-2026'
tags:
  - cve.org
epss: 0.00109
epssPercentile: 0.01251
ingestedAt: '2026-11-05T19:30:42.905Z'
---

## Overview

In usb, there is a possible memory corruption due to use after free. 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: ALPS11411985; Issue ID: MSV-9750.

## Affected

- `mediatek_chipset MT6858`
- `mediatek_chipset MT6881`
- `mediatek_chipset MT6993`
- `mediatek_chipset MT8188`
- `mediatek_chipset MT8189`
- `mediatek_chipset MT8518S`
- `mediatek_chipset MT8532`
- `mediatek_chipset MT8668`

## Remediation

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