CVE-2026-90025

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 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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxaf8622f6a585d8d82b11cd7987e082861fd0edd3 < 8fde7e4a366184e9a6aa95541e52933a73c00a74affected
LinuxLinuxaf8622f6a585d8d82b11cd7987e082861fd0edd3 < 83f1abd62cc134700ba92e1e2dc650a49a185497affected
LinuxLinuxaf8622f6a585d8d82b11cd7987e082861fd0edd3 < 1ffed96ef986e2cdf986aa4a4506a5e6dcdf4456affected
LinuxLinuxaf8622f6a585d8d82b11cd7987e082861fd0edd3 < 58e0ee293ec5e06cacbe3953ad44042f1473dae9affected
LinuxLinuxaf8622f6a585d8d82b11cd7987e082861fd0edd3 < ac9f878c468052af6571e8639ab1c3ae040b908faffected
LinuxLinuxaf8622f6a585d8d82b11cd7987e082861fd0edd3 < 33a81acd2d1d0667d4eff93cb90339fa53e617e8affected
LinuxLinuxaf8622f6a585d8d82b11cd7987e082861fd0edd3 < bdaaf3074aedce8f1b173cc363d61cff5f6a585faffected
LinuxLinuxaf8622f6a585d8d82b11cd7987e082861fd0edd3 < 04cec690b1fd9d1c4c314b91a10d8c68a3acfe18affected
LinuxLinux5.2affected
LinuxLinux0 < 5.2unaffected
LinuxLinux5.10.270 <= 5.10.*unaffected
LinuxLinux5.15.221 <= 5.15.*unaffected
LinuxLinux6.1.188 <= 6.1.*unaffected
LinuxLinux6.6.157 <= 6.6.*unaffected
LinuxLinux6.12.110 <= 6.12.*unaffected
LinuxLinux6.18.51 <= 6.18.*unaffected
LinuxLinux7.2.5 <= 7.2.*unaffected
LinuxLinux7.3-rc2 <= *unaffected

Weaknesses

References