---
id: CVE-2026-90025
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  usb: typec: ucsi: displayport: Fix OOB altmode array index

  The UCSI displayport driver indexes the connector's port altmode array
  with the GET_CURRENT_CAM response aft…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  usb: typec: ucsi: displayport: Fix OOB altmode array index

  The UCSI displayport driver indexes the connector's port altmode array
  with the GET_CURRENT_CAM response aft…
severity: high
cvss: 7.7
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H'
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= af8622f6a585d8d82b11cd7987e082861fd0edd3 <
    8fde7e4a366184e9a6aa95541e52933a73c00a74
  - >-
    Linux >= af8622f6a585d8d82b11cd7987e082861fd0edd3 <
    83f1abd62cc134700ba92e1e2dc650a49a185497
  - >-
    Linux >= af8622f6a585d8d82b11cd7987e082861fd0edd3 <
    1ffed96ef986e2cdf986aa4a4506a5e6dcdf4456
  - >-
    Linux >= af8622f6a585d8d82b11cd7987e082861fd0edd3 <
    58e0ee293ec5e06cacbe3953ad44042f1473dae9
  - >-
    Linux >= af8622f6a585d8d82b11cd7987e082861fd0edd3 <
    ac9f878c468052af6571e8639ab1c3ae040b908f
  - >-
    Linux >= af8622f6a585d8d82b11cd7987e082861fd0edd3 <
    33a81acd2d1d0667d4eff93cb90339fa53e617e8
  - >-
    Linux >= af8622f6a585d8d82b11cd7987e082861fd0edd3 <
    bdaaf3074aedce8f1b173cc363d61cff5f6a585f
  - >-
    Linux >= af8622f6a585d8d82b11cd7987e082861fd0edd3 <
    04cec690b1fd9d1c4c314b91a10d8c68a3acfe18
  - Linux 5.2
published: '2026-09-16'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T15:18:25.790'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90025'
references:
  - url: 'https://git.kernel.org/stable/c/04cec690b1fd9d1c4c314b91a10d8c68a3acfe18'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/1ffed96ef986e2cdf986aa4a4506a5e6dcdf4456'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/33a81acd2d1d0667d4eff93cb90339fa53e617e8'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/58e0ee293ec5e06cacbe3953ad44042f1473dae9'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/83f1abd62cc134700ba92e1e2dc650a49a185497'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8fde7e4a366184e9a6aa95541e52933a73c00a74'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ac9f878c468052af6571e8639ab1c3ae040b908f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/bdaaf3074aedce8f1b173cc363d61cff5f6a585f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-16T10:53:53.935Z'
epss: 0.0019
epssPercentile: 0.0774
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

usb: typec: ucsi: displayport: Fix OOB altmode array index

The UCSI displayport driver indexes the connector's port altmode array
with the GET_CURRENT_CAM response after checking it is not 0xff. The
port altmode array is UCSI_MAX_ALTMODES elements long. If the PPM
returns an invalid GET_CURRENT_CAM response above UCSI_MAX_ALTMODES and
not equal to 0xff, the kernel may crash with an array index OOB error.

Update the UCSI displayport driver to verify the current cam is less
than UCSI_MAX_ALTMODES before accessing the port altmode array.

## Remediation

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