CVE-2026-90025
Published: September 18, 2026Last modified: October 6, 2026
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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.7 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | HIGH |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Fixed (6.1.189-r0) |
| 25 LTS | linux-lts | Fixed (6.12.111-r0) | |
| Stream | linux-lts | Fixed (6.18.53-r0) |
References
- 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