---
id: CVE-2026-98828
title: 'kernel: wifi: ath9k: reject short WMI command responses (CVE-2026-98828)'
summary: >-
  A flaw was found in the Linux kernel's ath9k wireless driver. When handling
  Wireless Module Interface (WMI) command responses, the driver copies data into
  a response buffer without verifying that the received message is sufficiently
  long. …
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-125
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: '2026-10-23T20:50:56+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98828.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98828.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-98828'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2555205'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-98828'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98828'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98828.mbox
  - url: 'https://git.kernel.org/stable/c/03ef61d05aa26022327f971b790f07e6bf6e35d6'
  - url: 'https://git.kernel.org/stable/c/e0c21130c1c7791ba73b19a3a9ea767c8cd43745'
  - url: 'https://git.kernel.org/stable/c/a3b0137c855a61371d9cf9993b8bcc33c9798202'
  - url: 'https://git.kernel.org/stable/c/93ce8ea70451e800601bc9444aa33043de15d67b'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.002
epssPercentile: 0.0973
ingestedAt: '2026-10-18T16:47:32.472Z'
---

## Overview

A flaw was found in the Linux kernel's ath9k wireless driver. When handling Wireless Module Interface (WMI) command responses, the driver copies data into a response buffer without verifying that the received message is sufficiently long. A malicious or compromised device can return a truncated response to trigger an out-of-bounds read beyond the allocated packet buffer. This issue can result in a Denial of Service (DoS) due to a system crash or potentially lead to information disclosure.

## 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-2026-98828.json)

**kernel: wifi: ath9k: reject short WMI command responses** — 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