---
id: CVE-2026-89524
title: >-
  kernel: wifi: ath6kl: clamp assoc request/response lengths before subtracting
  IE offsets (CVE-2026-89524)
summary: >-
  A flaw was found in the ath6kl Wi-Fi driver of the Linux kernel. An integer
  underflow vulnerability occurs when processing Wi-Fi association requests or
  responses that are shorter than expected. This can cause the system to read
  beyond the…
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-125
vendor: Red Hat
product: Linux
affected:
  - >-
    Linux >= bdcd81707973cf8aa9305337166f8ee842a050d4 <
    225587bdbf4b0eb5265a71ee4dc183561a1857fc
  - >-
    Linux >= bdcd81707973cf8aa9305337166f8ee842a050d4 <
    d337213a889705a69735079606d0b4c672b17605
  - >-
    Linux >= bdcd81707973cf8aa9305337166f8ee842a050d4 <
    e11d5ae96d5e52cb48fa27c6ad352d766d0322fb
  - >-
    Linux >= bdcd81707973cf8aa9305337166f8ee842a050d4 <
    6deb4d7a0c3d91821b2a8d5239e3d9933d9217d9
  - >-
    Linux >= bdcd81707973cf8aa9305337166f8ee842a050d4 <
    e3619bed5da125713b29ac881dc66f5e06606f88
  - >-
    Linux >= bdcd81707973cf8aa9305337166f8ee842a050d4 <
    e1330d719c047c4d8190a16be034b29fc601a815
  - >-
    Linux >= bdcd81707973cf8aa9305337166f8ee842a050d4 <
    8eb73016fb3968cf2db3987a92764563a3af773a
  - >-
    Linux >= bdcd81707973cf8aa9305337166f8ee842a050d4 <
    3bbd05723d15dd06f0560bcd94fbf9a91b5f5613
  - Linux 3.2
published: '2026-09-11'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T12:14:01+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89524.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89524.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89524'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532320'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89524'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89524'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89524.mbox
  - url: 'https://git.kernel.org/stable/c/225587bdbf4b0eb5265a71ee4dc183561a1857fc'
  - url: 'https://git.kernel.org/stable/c/d337213a889705a69735079606d0b4c672b17605'
  - url: 'https://git.kernel.org/stable/c/e11d5ae96d5e52cb48fa27c6ad352d766d0322fb'
  - url: 'https://git.kernel.org/stable/c/6deb4d7a0c3d91821b2a8d5239e3d9933d9217d9'
  - url: 'https://git.kernel.org/stable/c/e3619bed5da125713b29ac881dc66f5e06606f88'
  - url: 'https://git.kernel.org/stable/c/e1330d719c047c4d8190a16be034b29fc601a815'
  - url: 'https://git.kernel.org/stable/c/8eb73016fb3968cf2db3987a92764563a3af773a'
  - url: 'https://git.kernel.org/stable/c/3bbd05723d15dd06f0560bcd94fbf9a91b5f5613'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
  - score-dispute
epss: 0.00419
epssPercentile: 0.33565
scores:
  vendor: 5.5
  cna: 8.1
ingestedAt: '2026-09-14T15:23:07.452Z'
---

## Overview

A flaw was found in the ath6kl Wi-Fi driver of the Linux kernel. An integer underflow vulnerability occurs when processing Wi-Fi association requests or responses that are shorter than expected. This can cause the system to read beyond the intended buffer, leading to the disclosure of adjacent memory to a remote attacker. This information disclosure could potentially expose sensitive data.

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-09-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89524.json)

**kernel: wifi: ath6kl: clamp assoc request/response lengths before subtracting IE offsets** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-16.

Not 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

## Remediation

Refer to the advisory for fix availability.