---
id: CVE-2026-98696
title: 'USB: serial: fix driver deregistration order'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  USB: serial: fix driver deregistration order

  USB serial driver modules register one driver for the USB bus and one or
  more drivers for the ports on the USB serial bus.…
severity: medium
cvss: 4.1
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe:
  - CWE-416
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 765e0ba62613fb90f09c1b5926750df0aa56f349 <
    e7ad832b1144df19cbbaaa655625c6f984e85b9f
  - >-
    Linux >= 765e0ba62613fb90f09c1b5926750df0aa56f349 <
    9b085a06a0a411b0bcdf18b61c3ebf1be1c72ffe
  - >-
    Linux >= 765e0ba62613fb90f09c1b5926750df0aa56f349 <
    a1aa474768f69ea3a70da523f00f74c264cfa10e
  - >-
    Linux >= 765e0ba62613fb90f09c1b5926750df0aa56f349 <
    428d479a0d31460fbf5969ab262ccd673f1fac01
  - >-
    Linux >= 765e0ba62613fb90f09c1b5926750df0aa56f349 <
    646e5b28b4fdbc1b828a2398d6ced2c1dd308a46
  - Linux 3.4
published: '2026-10-18'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T12:55:45.691Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-98696'
references:
  - url: 'https://git.kernel.org/stable/c/e7ad832b1144df19cbbaaa655625c6f984e85b9f'
  - url: 'https://git.kernel.org/stable/c/9b085a06a0a411b0bcdf18b61c3ebf1be1c72ffe'
  - url: 'https://git.kernel.org/stable/c/a1aa474768f69ea3a70da523f00f74c264cfa10e'
  - url: 'https://git.kernel.org/stable/c/428d479a0d31460fbf5969ab262ccd673f1fac01'
  - url: 'https://git.kernel.org/stable/c/646e5b28b4fdbc1b828a2398d6ced2c1dd308a46'
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98696.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-98696'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2555170'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-98696'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98696'
  - url: 'https://kernelcve.org/list/?q=CVE-2026-98696'
tags:
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00168
epssPercentile: 0.05988
ingestedAt: '2026-10-18T16:47:32.517Z'
---

## Overview

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

USB: serial: fix driver deregistration order

USB serial driver modules register one driver for the USB bus and one or
more drivers for the ports on the USB serial bus.

When unloading a driver module, the USB driver must be deregistered
before the USB serial bus drivers so that I/O is stopped before
unbinding the ports to avoid use-after-free in completion handlers
accessing port data.

Note that the "new_id" attributes must first be removed to prevent new
ids from being added and triggering a probe of the USB driver after it
has been deregistered.

## Affected

- `Linux >= 765e0ba62613fb90f09c1b5926750df0aa56f349 < e7ad832b1144df19cbbaaa655625c6f984e85b9f`
- `Linux >= 765e0ba62613fb90f09c1b5926750df0aa56f349 < 9b085a06a0a411b0bcdf18b61c3ebf1be1c72ffe`
- `Linux >= 765e0ba62613fb90f09c1b5926750df0aa56f349 < a1aa474768f69ea3a70da523f00f74c264cfa10e`
- `Linux >= 765e0ba62613fb90f09c1b5926750df0aa56f349 < 428d479a0d31460fbf5969ab262ccd673f1fac01`
- `Linux >= 765e0ba62613fb90f09c1b5926750df0aa56f349 < 646e5b28b4fdbc1b828a2398d6ced2c1dd308a46`
- `Linux 3.4`

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10 · no fix planned: Red Hat Enterprise Linux 10 · updated 2026-10-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98696.json)