CVE-2026-90025

High

Description

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.

SeverityHigh

CVSS7.7

Exploit probability—

Product

Linux

PublishedSep 16, 2026

First seenSep 16, 2026

How to fix

Update

Linux Linux8fde7e4a366184e9a6aa95541e52933a73c00a74, 83f1abd62cc134700ba92e1e2dc650a49a185497, 1ffed96ef986e2cdf986aa4a4506a5e6dcdf4456, 58e0ee293ec5e06cacbe3953ad44042f1473dae9, ac9f878c468052af6571e8639ab1c3ae040b908f, 33a81acd2d1d0667d4eff93cb90339fa53e617e8, bdaaf3074aedce8f1b173cc363d61cff5f6a585f, 04cec690b1fd9d1c4c314b91a10d8c68a3acfe18 or later

Affected products

Product	Affected versions	Fixed in
Linux Linux	af8622f6a585d8d82b11cd7987e082861fd0edd3 ≤ v < 8fde7e4a366184e9a6aa95541e52933a73c00a74, af8622f6a585d8d82b11cd7987e082861fd0edd3 ≤ v < 83f1abd62cc134700ba92e1e2dc650a49a185497, af8622f6a585d8d82b11cd7987e082861fd0edd3 ≤ v < 1ffed96ef986e2cdf986aa4a4506a5e6dcdf4456, af8622f6a585d8d82b11cd7987e082861fd0edd3 ≤ v < 58e0ee293ec5e06cacbe3953ad44042f1473dae9, af8622f6a585d8d82b11cd7987e082861fd0edd3 ≤ v < ac9f878c468052af6571e8639ab1c3ae040b908f, af8622f6a585d8d82b11cd7987e082861fd0edd3 ≤ v < 33a81acd2d1d0667d4eff93cb90339fa53e617e8, af8622f6a585d8d82b11cd7987e082861fd0edd3 ≤ v < bdaaf3074aedce8f1b173cc363d61cff5f6a585f, af8622f6a585d8d82b11cd7987e082861fd0edd3 ≤ v < 04cec690b1fd9d1c4c314b91a10d8c68a3acfe18, 5.2	8fde7e4a366184e9a6aa95541e52933a73c00a74, 83f1abd62cc134700ba92e1e2dc650a49a185497, 1ffed96ef986e2cdf986aa4a4506a5e6dcdf4456, 58e0ee293ec5e06cacbe3953ad44042f1473dae9, ac9f878c468052af6571e8639ab1c3ae040b908f, 33a81acd2d1d0667d4eff93cb90339fa53e617e8, bdaaf3074aedce8f1b173cc363d61cff5f6a585f, 04cec690b1fd9d1c4c314b91a10d8c68a3acfe18

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