---
id: CVE-2026-20511
title: 'In SurfaceFlinger, there is a possible memory corruption due to use after free'
summary: >-
  In SurfaceFlinger, 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
  exploitat…
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'
cwe:
  - CWE-416
vendor: 'MediaTek, Inc.'
product: MediaTek chipset
affected:
  - mediatek_chipset MT6858
  - mediatek_chipset MT6881
  - mediatek_chipset MT6993
  - mediatek_chipset MT8668
published: '2026-09-07'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T18:38:19.590'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-20511'
references:
  - url: 'https://www.mediatek.com/product-security-bulletin/September-2026'
    label: security@mediatek.com
tags:
  - nvd
  - cve.org
epss: 0.00114
epssPercentile: 0.01355
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-07T00:00:00+00:00'
ingestedAt: '2026-09-07T12:10:16.159Z'
---

## Overview

In SurfaceFlinger, 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: ALPS11123860; Issue ID: MSV-8890.

## Remediation

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