---
title: "CVE-2026-89524: Linux Kernel - Information Disclosure"
description: "Linux kernel contains an information disclosure vulnerability in ath6kl_cfg80211_connect_event() caused by underflow of assoc request/response lengths due to missing lower bound checks, letting attackers disclose adjacent slab memory, exploit requires crafted assoc request/response."
url: https://panop.io/threat-heartbeat/CVE-2026-89524/
---

# CVE-2026-89524 Linux Kernel - Information Disclosure

Linux kernel contains an information disclosure vulnerability in ath6kl\_cfg80211\_connect\_event() caused by underflow of assoc request/response lengths due to missing lower bound checks, letting attackers disclose adjacent slab memory, exploit requires crafted assoc request/response.

CVSS base score 8.1 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.27% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-89524)

## Details

Type

Information Disclosure

Impact

Information Disclosure

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Published

11 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version with the fix applied.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-89524](https://nvd.nist.gov/vuln/detail/CVE-2026-89524)
- [https://git.kernel.org/stable/c/8eb73016fb3968cf2db3987a92764563a3af773a](https://git.kernel.org/stable/c/8eb73016fb3968cf2db3987a92764563a3af773a)
- [https://git.kernel.org/stable/c/e1330d719c047c4d8190a16be034b29fc601a815](https://git.kernel.org/stable/c/e1330d719c047c4d8190a16be034b29fc601a815)
- [https://git.kernel.org/stable/c/e3619bed5da125713b29ac881dc66f5e06606f88](https://git.kernel.org/stable/c/e3619bed5da125713b29ac881dc66f5e06606f88)
- [https://git.kernel.org/stable/c/225587bdbf4b0eb5265a71ee4dc183561a1857fc](https://git.kernel.org/stable/c/225587bdbf4b0eb5265a71ee4dc183561a1857fc)
- [https://git.kernel.org/stable/c/6deb4d7a0c3d91821b2a8d5239e3d9933d9217d9](https://git.kernel.org/stable/c/6deb4d7a0c3d91821b2a8d5239e3d9933d9217d9)
- [https://git.kernel.org/stable/c/d337213a889705a69735079606d0b4c672b17605](https://git.kernel.org/stable/c/d337213a889705a69735079606d0b4c672b17605)
- [https://git.kernel.org/stable/c/e11d5ae96d5e52cb48fa27c6ad352d766d0322fb](https://git.kernel.org/stable/c/e11d5ae96d5e52cb48fa27c6ad352d766d0322fb)
- [https://git.kernel.org/stable/c/3bbd05723d15dd06f0560bcd94fbf9a91b5f5613](https://git.kernel.org/stable/c/3bbd05723d15dd06f0560bcd94fbf9a91b5f5613)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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