---
id: CVE-2026-64338
title: 'USB: misc: uss720: unregister parport on probe failure'
summary: |-
  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 ada…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 04736c1bc32197f7d859e01a96ae80a16659931d <
    6bbb98bec71b577fda4f4b48f7aea5874b04a576
  - >-
    Linux >= 4eaf2331a77996bbbaf2b824d452ac8ebda7e6e7 <
    93563243377f8e9b46cc94d9c4f06533dd31b141
  - >-
    Linux >= 8fc246a8a456679993df565d3c9e3da28030ee43 <
    1712fd71a5aaf81e47c747f180535fa963ad7830
  - >-
    Linux >= 10132ccf99f49b43aeb7470df50d72344a601ad6 <
    0b3073f40cc9f95d5ff0037eb0a06f5c1725a7ea
  - >-
    Linux >= 3295f1b866bfbcabd625511968e8a5c541f9ab32 <
    5e62d7857fd51b908b8371062ee839739a086bbe
  - >-
    Linux >= 3295f1b866bfbcabd625511968e8a5c541f9ab32 <
    729b68a5bad71220ae0914c8bdab9488ad5be6c8
  - >-
    Linux >= 3295f1b866bfbcabd625511968e8a5c541f9ab32 <
    48dd0b2ec9f2e97c486eb68cd0a64b25c1c3df3e
  - >-
    Linux >= 3295f1b866bfbcabd625511968e8a5c541f9ab32 <
    b4ecbdc4f8830f5586c4a5cfc384c00f20f8f8b3
  - Linux 02d13616ca30014ed96302e51a5b0e17664e58bc
  - Linux dff3b01e91a3df93063b03d0f8dd5c40546687ec
  - Linux 489d77fbd66375972a380d207f7eb39b00c4a67b
  - Linux >= 5.10.221 < 5.10.261
  - Linux >= 5.15.162 < 5.15.212
  - Linux >= 6.1.96 < 6.1.178
  - Linux >= 6.6.36 < 6.6.145
  - Linux >= 4.19.317 < 4.20
  - Linux >= 5.4.279 < 5.5
  - Linux >= 6.9.7 < 6.10
  - Linux 6.10
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-06T16:35:43.647089Z'
published: '2026-07-25'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T16:44:46.836Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-64338'
references:
  - url: 'https://git.kernel.org/stable/c/6bbb98bec71b577fda4f4b48f7aea5874b04a576'
  - url: 'https://git.kernel.org/stable/c/93563243377f8e9b46cc94d9c4f06533dd31b141'
  - url: 'https://git.kernel.org/stable/c/1712fd71a5aaf81e47c747f180535fa963ad7830'
  - url: 'https://git.kernel.org/stable/c/0b3073f40cc9f95d5ff0037eb0a06f5c1725a7ea'
  - url: 'https://git.kernel.org/stable/c/5e62d7857fd51b908b8371062ee839739a086bbe'
  - url: 'https://git.kernel.org/stable/c/729b68a5bad71220ae0914c8bdab9488ad5be6c8'
  - url: 'https://git.kernel.org/stable/c/48dd0b2ec9f2e97c486eb68cd0a64b25c1c3df3e'
  - url: 'https://git.kernel.org/stable/c/b4ecbdc4f8830f5586c4a5cfc384c00f20f8f8b3'
tags:
  - cve.org
epss: 0.00123
epssPercentile: 0.02031
ingestedAt: '2026-11-06T16:57:43.196Z'
---

## Overview

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

- `Linux >= 04736c1bc32197f7d859e01a96ae80a16659931d < 6bbb98bec71b577fda4f4b48f7aea5874b04a576`
- `Linux >= 4eaf2331a77996bbbaf2b824d452ac8ebda7e6e7 < 93563243377f8e9b46cc94d9c4f06533dd31b141`
- `Linux >= 8fc246a8a456679993df565d3c9e3da28030ee43 < 1712fd71a5aaf81e47c747f180535fa963ad7830`
- `Linux >= 10132ccf99f49b43aeb7470df50d72344a601ad6 < 0b3073f40cc9f95d5ff0037eb0a06f5c1725a7ea`
- `Linux >= 3295f1b866bfbcabd625511968e8a5c541f9ab32 < 5e62d7857fd51b908b8371062ee839739a086bbe`
- `Linux >= 3295f1b866bfbcabd625511968e8a5c541f9ab32 < 729b68a5bad71220ae0914c8bdab9488ad5be6c8`
- `Linux >= 3295f1b866bfbcabd625511968e8a5c541f9ab32 < 48dd0b2ec9f2e97c486eb68cd0a64b25c1c3df3e`
- `Linux >= 3295f1b866bfbcabd625511968e8a5c541f9ab32 < b4ecbdc4f8830f5586c4a5cfc384c00f20f8f8b3`
- `Linux 02d13616ca30014ed96302e51a5b0e17664e58bc`
- `Linux dff3b01e91a3df93063b03d0f8dd5c40546687ec`
- `Linux 489d77fbd66375972a380d207f7eb39b00c4a67b`
- `Linux >= 5.10.221 < 5.10.261`
- `Linux >= 5.15.162 < 5.15.212`
- `Linux >= 6.1.96 < 6.1.178`
- `Linux >= 6.6.36 < 6.6.145`
- `Linux >= 4.19.317 < 4.20`
- `Linux >= 5.4.279 < 5.5`
- `Linux >= 6.9.7 < 6.10`
- `Linux 6.10`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.