---
id: CVE-2026-43219
title: >-
  In the Linux kernel, the following vulnerability has been resolved:


  net: cpsw_new: Fix potential unregister of netdev that has not been registered
  yet


  If an error occurs during register_netdev() for the first MAC in

  cpsw_register_ports…
summary: >-
  In the Linux kernel, the following vulnerability has been resolved:


  net: cpsw_new: Fix potential unregister of netdev that has not been registered
  yet


  If an error occurs during register_netdev() for the first MAC in

  cpsw_register_ports…
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'
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 5.5, < 6.18.16'
  - 'linux_kernel >= 6.19, < 6.19.6'
patched:
  - linux_kernel 6.19.6
published: '2026-05-06'
updated: '2026-07-04'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-43219'
references:
  - url: 'https://git.kernel.org/stable/c/14645799ad5253a028cf662e2f9cd18a68f74b31'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/23acc565186ee27e788408cbd81b92730b6aaa3a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/29739ec197ed66535bc0b86f14ab66c5f4512138'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/349c4cac6f54a81fc107589771f88136a2b20415'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/67cca9df4d17f2c824655d31195b2e75334ae286'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9d724b34fbe13b71865ad0906a4be97571f19cf5'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d31a12cee10bbc12b4b523a4709fd1fdee8b7d0f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/da8e1623a3028e1d8c75eec7898d94c6f17dce40'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00162
epssPercentile: 0.04756
ingestedAt: '2026-07-04T12:56:09.376Z'
---

## Overview

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

net: cpsw_new: Fix potential unregister of netdev that has not been registered yet

If an error occurs during register_netdev() for the first MAC in
cpsw_register_ports(), even though cpsw->slaves[0].ndev is set to NULL,
cpsw->slaves[1].ndev would remain unchanged. This could later cause
cpsw_unregister_ports() to attempt unregistering the second MAC.
To address this, add a check for ndev->reg_state before calling
unregister_netdev(). With this change, setting cpsw->slaves[i].ndev
to NULL becomes unnecessary and can be removed accordingly.

## Affected

- `linux_kernel >= 5.5, < 6.18.16`
- `linux_kernel >= 6.19, < 6.19.6`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.19.6`