---
id: CVE-2026-89623
title: 'HID: mcp2221: stop device IO before hid_hw_stop'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  HID: mcp2221: stop device IO before hid_hw_stop

  Quiesce device IO at the start of the devm cleanup callback
  mcp2221_hid_unregister() so that incoming HID reports canno…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe:
  - CWE-825
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= d4b50ac06ea6e47bdd2b04e97d1090c673c80645 <
    85d963499f1feeea287c0a37c3eac3fc1898eca9
  - >-
    Linux >= 73ce9f1f2741a38f5d27393e627702ae2c46e6f2 <
    0ae90a19e6b5a8557d25d95facb7e01c9c07af38
  - >-
    Linux >= 73ce9f1f2741a38f5d27393e627702ae2c46e6f2 <
    c99ba6c234d4d537c317336376b78c088174034a
  - >-
    Linux >= 73ce9f1f2741a38f5d27393e627702ae2c46e6f2 <
    2eda1513f573945c1e3a0090341f3d28740463b1
  - >-
    Linux >= 73ce9f1f2741a38f5d27393e627702ae2c46e6f2 <
    dca151633c0fde90935311c60e7cfc064aa56134
  - Linux >= 6.6.8 < 6.6.157
  - Linux 6.7
published: '2026-09-11'
updated: '2026-10-24'
sourceUpdated: '2026-10-24T14:14:00.813Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-89623'
references:
  - url: 'https://git.kernel.org/stable/c/85d963499f1feeea287c0a37c3eac3fc1898eca9'
  - url: 'https://git.kernel.org/stable/c/0ae90a19e6b5a8557d25d95facb7e01c9c07af38'
  - url: 'https://git.kernel.org/stable/c/c99ba6c234d4d537c317336376b78c088174034a'
  - url: 'https://git.kernel.org/stable/c/2eda1513f573945c1e3a0090341f3d28740463b1'
  - url: 'https://git.kernel.org/stable/c/dca151633c0fde90935311c60e7cfc064aa56134'
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89623.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89623'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532125'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89623'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89623'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89623.mbox
tags:
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00209
epssPercentile: 0.10938
ingestedAt: '2026-09-14T15:23:07.450Z'
---

## Overview

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

HID: mcp2221: stop device IO before hid_hw_stop

Quiesce device IO at the start of the devm cleanup callback
mcp2221_hid_unregister() so that incoming HID reports cannot race with
hardware teardown during probe failure or device removal, addressing a
potential use-after-free.

Guard the call to hid_device_io_stop() with io_started. On normal
removal hid_device_remove() has already cleared io_started before the
devres group is released, so an unconditional call would otherwise hit
the !io_started path and emit a spurious "io already stopped" warning
on every removal. The guard preserves the probe-failure balancing,
where io_started is still set after hid_device_io_start(), while
staying silent on the normal removal path.

## Affected

- `Linux >= d4b50ac06ea6e47bdd2b04e97d1090c673c80645 < 85d963499f1feeea287c0a37c3eac3fc1898eca9`
- `Linux >= 73ce9f1f2741a38f5d27393e627702ae2c46e6f2 < 0ae90a19e6b5a8557d25d95facb7e01c9c07af38`
- `Linux >= 73ce9f1f2741a38f5d27393e627702ae2c46e6f2 < c99ba6c234d4d537c317336376b78c088174034a`
- `Linux >= 73ce9f1f2741a38f5d27393e627702ae2c46e6f2 < 2eda1513f573945c1e3a0090341f3d28740463b1`
- `Linux >= 73ce9f1f2741a38f5d27393e627702ae2c46e6f2 < dca151633c0fde90935311c60e7cfc064aa56134`
- `Linux >= 6.6.8 < 6.6.157`
- `Linux 6.7`

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat OpenShift Container Platform 4 · updated 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89623.json)