CVE-2026-64338USB: misc: uss720: unregister parport on probe failure

Official 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.

Affected packages & fixed versions

Affected products (as reported)

References

• https://git.kernel.org/stable/c/6bbb98bec71b577fda4f4b48f7aea5874b04a576
• https://git.kernel.org/stable/c/93563243377f8e9b46cc94d9c4f06533dd31b141
• https://git.kernel.org/stable/c/1712fd71a5aaf81e47c747f180535fa963ad7830
• https://git.kernel.org/stable/c/0b3073f40cc9f95d5ff0037eb0a06f5c1725a7ea
• https://git.kernel.org/stable/c/5e62d7857fd51b908b8371062ee839739a086bbe
• https://git.kernel.org/stable/c/729b68a5bad71220ae0914c8bdab9488ad5be6c8
• https://git.kernel.org/stable/c/48dd0b2ec9f2e97c486eb68cd0a64b25c1c3df3e
• https://git.kernel.org/stable/c/b4ecbdc4f8830f5586c4a5cfc384c00f20f8f8b3