CVE-2026-64338

Technical Description

In the Linux kernel, the following vulnerability has been resolved:

USB: misc: uss720: unregister parport on probe failure

uss720_probe() registers a parport before reading the 1284 register used

to detect unsupported Belkin F5U002 adapters. If get_1284_register()

fails, the error path drops the driver private data and the USB device

reference, but leaves the parport device registered.

Leaving the port registered is more than a private allocation leak:

parport_register_port() has already reserved a parport number and

registered the parport bus device, while pp->private_data still points at

the private data that the common error path is about to release.

Undo the pre-announce registration in the get_1284_register() failure

branch before jumping to the common private-data cleanup path. Clear

priv->pp first, matching the disconnect path and avoiding a stale pointer

in the private data.

This issue was identified during our ongoing static-analysis research while

reviewing kernel code.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References