Vulnerability in Linux

CVE-2026-64338

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.

EPSS: 0.001 (2.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

  • Linux — versions 04736c1bc32197f7d859e01a96ae80a16659931d, dff3b01e91a3df93063b03d0f8dd5c40546687ec, 7.2
  • Linux Linux_kernel — versions 7.2

References

Frequently asked questions

What is CVE-2026-64338?
CVE-2026-64338 is a medium-severity vulnerability in Linux. CVSS score: 5.5/10. Published 2026-07-25.
How severe is CVE-2026-64338?
Medium severity. CVSS v3 base score is 5.5 out of 10.