---
id: CVE-2026-80947
title: >-
  kernel: wifi: rtl8xxxu: fix use-after-free from rx_urb_wq on stop
  (CVE-2026-80947)
summary: >-
  A flaw was found in the Linux kernel's `rtl8xxxu` Wi-Fi driver. A race
  condition exists during the driver's stop process, specifically when handling
  receive (RX) Universal Serial Bus (USB) Request Blocks (URBs). This allows a
  worker to acc…
severity: medium
cvss: 4.7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe:
  - CWE-416
  - CWE-825
vendor: Red Hat
product: Red Hat Enterprise Linux 9
affected:
  - enterprise_linux 10
  - enterprise_linux 9
  - openshift_container_platform 4
published: '2026-09-11'
updated: '2026-10-24'
sourceUpdated: '2026-10-24T01:39:43+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80947.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80947.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-80947'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532317'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-80947'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-80947'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80947.mbox
  - url: 'https://kernelcve.org/list/?q=CVE-2026-80947'
  - url: 'https://git.kernel.org/stable/c/17d5ae58973122eea7625a87cd3d80a8beb23b47'
  - url: 'https://git.kernel.org/stable/c/800d2b490a9af1e7132a3564c2ad5a81292e5b40'
  - url: 'https://git.kernel.org/stable/c/620acb1e8037b73a457dc8ef20fc23fc7adcb405'
  - url: 'https://git.kernel.org/stable/c/972ab8b9c08f3eb3fa535082de2950dd93604dfd'
  - url: 'https://git.kernel.org/stable/c/6c080026ecc17eecb103f8927c64ea73a74bb818'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00164
epssPercentile: 0.05538
scores:
  vendor: 7
  cna: 7.8
ingestedAt: '2026-09-14T15:23:07.476Z'
---

## Overview

A flaw was found in the Linux kernel's `rtl8xxxu` Wi-Fi driver. A race condition exists during the driver's stop process, specifically when handling receive (RX) Universal Serial Bus (USB) Request Blocks (URBs). This allows a worker to access memory that has already been freed, leading to a use-after-free vulnerability. This issue can result in system instability or a denial of service.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-24 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80947.json)

**kernel: wifi: rtl8xxxu: fix use-after-free from rx_urb_wq on stop** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-10-24.

Affected:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

No fix planned:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

Not affected:

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

## Remediation

Fix deferred

Workarounds / mitigations:

- Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.