---
id: CVE-2023-53589
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: iwlwifi: mvm: don't trust firmware n_channels

  If the firmware sends us a corrupted MCC response with
  n_channels much larger than the command response can be,
  we …
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: iwlwifi: mvm: don't trust firmware n_channels

  If the firmware sends us a corrupted MCC response with
  n_channels much larger than the command response can be,
  we …
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 4.1, < 5.4.244'
  - 'linux_kernel >= 5.5, < 5.10.181'
  - 'linux_kernel >= 5.11, < 5.15.113'
  - 'linux_kernel >= 5.16, < 6.1.30'
  - 'linux_kernel >= 6.2, < 6.3.4'
  - linux_kernel = 6.4
patched:
  - linux_kernel 6.3.4
published: '2025-10-04'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T22:17:43.560'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2023-53589'
references:
  - url: 'https://git.kernel.org/stable/c/05ad5a4d421ce65652fcb24d46b7e273130240d6'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/557ba100d8cf3661ff8d71c0b4a2cba8db555ec2'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/682b6dc29d98e857e6ca4bbc077c7dc2899b7473'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c176f03350954b795322de0bfe1d7b514db41f45'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d0d39bed9e95f27a246be91c5929254ac043ed30'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e519a404a5bbba37693cb10fa61794a5fce4fd9b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
epss: 0.00236
epssPercentile: 0.14572
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-15T21:35:44.946339Z'
ingestedAt: '2026-10-15T22:48:25.410Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

wifi: iwlwifi: mvm: don't trust firmware n_channels

If the firmware sends us a corrupted MCC response with
n_channels much larger than the command response can be,
we might copy far too much (uninitialized) memory and
even crash if the n_channels is large enough to make it
run out of the one page allocated for the FW response.

Fix that by checking the lengths. Doing a < comparison
would be sufficient, but the firmware should be doing
it correctly, so check more strictly.

## Affected

- `linux_kernel >= 4.1, < 5.4.244`
- `linux_kernel >= 5.5, < 5.10.181`
- `linux_kernel >= 5.11, < 5.15.113`
- `linux_kernel >= 5.16, < 6.1.30`
- `linux_kernel >= 6.2, < 6.3.4`
- `linux_kernel = 6.4`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.3.4`