CVE Catalog

CVE-2026-90025

HighCVSS 7.7
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.17%

6th percentile - higher than 6% of all known CVEs

Summary

In the Linux kernel, the usb: typec: ucsi: displayport driver has an out-of-bounds (OOB) altmode array index. The driver indexes the connector's port altmode array with the GET_CURRENT_CAM response after checking it is not 0xff. The array is UCSI_MAX_ALTMODES elements long, so if the PPM returns an invalid response above UCSI_MAX_ALTMODES and not equal to 0xff, the kernel may crash with an OOB index error.

Risk Assessment

Can lead to a kernel crash (panic) or potential kernel-context code execution. Requires a UCSI controller returning invalid responses.

Recommendation

Update the Linux kernel to a version containing the fix that verifies current cam is less than UCSI_MAX_ALTMODES before accessing the altmode array. Until patched, avoid using affected UCSI DisplayPort controllers.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS