---
id: CVE-2026-98763
title: >-
  kernel: usb: core: clear both ep_in and ep_out for non-ep0 control endpoints
  (CVE-2026-98763)
summary: >-
  A flaw was found in the Linux kernel's USB subsystem. This vulnerability
  allows an attacker with physical access connecting a malicious USB device, or
  a local user with privileges to emulate USB hardware, to cause a Denial of
  Service (DoS)…
severity: medium
cvss: 6.2
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe: CWE-825
vendor: Red Hat
product: Red Hat Enterprise Linux 9
affected:
  - enterprise_linux 10
  - enterprise_linux 6
  - enterprise_linux 7
  - enterprise_linux 8
  - enterprise_linux 9
  - openshift_container_platform 4
published: '2026-10-18'
updated: '2026-10-23'
sourceUpdated: '2026-10-23T05:34:02+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98763.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98763.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-98763'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2555121'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-98763'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98763'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98763.mbox
  - url: 'https://git.kernel.org/stable/c/198d74dcfa129523125f46a89479d3b446b17dbe'
  - url: 'https://git.kernel.org/stable/c/7a9f61476b0e8002092a52ee8295edeeb0a28d1e'
  - url: 'https://git.kernel.org/stable/c/1da16c46b8d7101b74bc2d72a04e23cf5c7ddea1'
  - url: 'https://git.kernel.org/stable/c/c50413ecb662ea43c7f487632c8114721743a277'
  - url: 'https://git.kernel.org/stable/c/0e8baa78d872f2db440d8b9ded946ab8dceb89eb'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00168
epssPercentile: 0.05971
ingestedAt: '2026-10-18T16:47:32.495Z'
---

## Overview

A flaw was found in the Linux kernel's USB subsystem. This vulnerability allows an attacker with physical access connecting a malicious USB device, or a local user with privileges to emulate USB hardware, to cause a Denial of Service (DoS) or potentially execute arbitrary code. When disabling a bidirectional USB control endpoint, the kernel fails to clear pointers for both data directions, leading to a use-after-free condition when accessing the freed endpoint memory.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98763.json)

**kernel: usb: core: clear both ep_in and ep_out for non-ep0 control endpoints** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-23.

Affected:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

No fix planned:

- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

## Remediation

Out of support scope