CVE-2026-90025

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.

CVSS v3 7.7 HIGH

7.7^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.5 / Impact : 5.2

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/04cec690b1fd9d1c4c314b91a10d8c68a3acfe18
https://git.kernel.org/stable/c/1ffed96ef986e2cdf986aa4a4506a5e6dcdf4456
https://git.kernel.org/stable/c/33a81acd2d1d0667d4eff93cb90339fa53e617e8
https://git.kernel.org/stable/c/58e0ee293ec5e06cacbe3953ad44042f1473dae9
https://git.kernel.org/stable/c/83f1abd62cc134700ba92e1e2dc650a49a185497
https://git.kernel.org/stable/c/8fde7e4a366184e9a6aa95541e52933a73c00a74
https://git.kernel.org/stable/c/ac9f878c468052af6571e8639ab1c3ae040b908f
https://git.kernel.org/stable/c/bdaaf3074aedce8f1b173cc363d61cff5f6a585f

Configurations

No configuration.

History

16 Sep 2026, 15:18

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.7

Information

Published : 2026-09-16 11:17

Updated : 2026-09-16 15:18

NVD link : CVE-2026-90025

Mitre link : CVE-2026-90025

CVE.ORG link : CVE-2026-90025

JSON object : View

Products Affected

No product.

CWE

No CWE.

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The\nport altmode array is UCSI_MAX_ALTMODES elements long. If the PPM\nreturns an invalid GET_CURRENT_CAM response above UCSI_MAX_ALTMODES and\nnot equal to 0xff, the kernel may crash with an array index OOB error.\n\nUpdate the UCSI displayport driver to verify the current cam is less\nthan UCSI_MAX_ALTMODES before accessing the port altmode array."}], "lastModified": "2026-09-16T15:18:25.790", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}