---
id: CVE-2026-89623
title: 'kernel: HID: mcp2221: stop device IO before hid_hw_stop (CVE-2026-89623)'
summary: >-
  A flaw was found in the Linux kernel's HID (Human Interface Device) mcp2221
  driver. This vulnerability occurs when the device's input/output (IO)
  operations are not properly stopped before hardware teardown during device
  removal or probe f…
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: Red Hat
product: Red Hat OpenShift Container Platform 4
affected:
  - openshift_container_platform 4
published: '2026-09-11'
updated: '2026-09-15'
sourceUpdated: '2026-09-15T16:23:36+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89623.json'
references:
  - 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
  - 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'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00209
epssPercentile: 0.11337
ingestedAt: '2026-09-14T15:23:07.450Z'
---

## Overview

A flaw was found in the Linux kernel's HID (Human Interface Device) mcp2221 driver. This vulnerability occurs when the device's input/output (IO) operations are not properly stopped before hardware teardown during device removal or probe failure. This timing issue can lead to a use-after-free condition, where the system attempts to access memory that has already been released. Such a condition could result in system instability or a denial of service.

## 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)

**kernel: HID: mcp2221: stop device IO before hid_hw_stop** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-15.

Affected:

- Red Hat OpenShift Container Platform 4

No fix planned:

- Red Hat OpenShift Container Platform 4

## Remediation

Fix deferred