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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:HAffected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= af8622f6a585d8d82b11cd7987e082861fd0edd3, < 8fde7e4a366184e9a6aa95541e52933a73c00a74; >= af8622f6a585d8d82b11cd7987e082861fd0edd3, < 83f1abd62cc134700ba92e1e2dc650a49a185497; >= af8622f6a585d8d82b11cd7987e082861fd0edd3, < 1ffed96ef986e2cdf986aa4a4506a5e6dcdf4456; >= af8622f6a585d8d82b11cd7987e082861fd0edd3, < 58e0ee293ec5e06cacbe3953ad44042f1473dae9; >= af8622f6a585d8d82b11cd7987e082861fd0edd3, < ac9f878c468052af6571e8639ab1c3ae040b908f; >= af8622f6a585d8d82b11cd7987e082861fd0edd3, < 33a81acd2d1d0667d4eff93cb90339fa53e617e8; >= af8622f6a585d8d82b11cd7987e082861fd0edd3, < bdaaf3074aedce8f1b173cc363d61cff5f6a585f; >= af8622f6a585d8d82b11cd7987e082861fd0edd3, < 04cec690b1fd9d1c4c314b91a10d8c68a3acfe18 |
| Linux | Linux | 5.2 |
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
Timeline
- Published
- Sep 16, 2026
- Last modified
- Oct 19, 2026
- NVD status
- Received