---
id: CVE-2024-26820
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  hv_netvsc: Register VF in netvsc_probe if NET_DEVICE_REGISTER missed

  If hv_netvsc driver is unloaded and reloaded, the NET_DEVICE_REGISTER
  handler cannot perform VF re…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  hv_netvsc: Register VF in netvsc_probe if NET_DEVICE_REGISTER missed

  If hv_netvsc driver is unloaded and reloaded, the NET_DEVICE_REGISTER
  handler cannot perform VF re…
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 >= 4.19.301, < 4.19.310'
  - 'linux_kernel >= 5.4.263, < 5.4.272'
  - 'linux_kernel >= 5.10.203, < 5.10.213'
  - 'linux_kernel >= 5.15.141, < 5.15.152'
  - 'linux_kernel >= 6.1.65, < 6.1.79'
  - 'linux_kernel >= 6.6.4, < 6.6.18'
  - 'linux_kernel >= 6.7, < 6.7.6'
  - linux_kernel = 6.8
  - debian_linux = 10.0
patched:
  - linux_kernel 6.7.6
published: '2024-04-17'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T01:17:24.877'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2024-26820'
references:
  - url: 'https://git.kernel.org/stable/c/309ef7de5d840e17607e7d65cbf297c0564433ef'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/4d29a58d96a78728cb01ee29ed70dc4bd642f135'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5b10a88f64c0315cfdef45de0aaaa4eef57de0b7'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9cae43da9867412f8bd09aee5c8a8dc5e8dc3dc2'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a71302c8638939c45e4ba5a99ea438185fd3f418'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b6d46f306b3964d05055ddaa96b58cd8bd3a472c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/bcb7164258d0a9a8aa2e73ddccc2d78f67d2519d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c7441c77c91e47f653104be8353b44a3366a5366'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/309ef7de5d840e17607e7d65cbf297c0564433ef'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/4d29a58d96a78728cb01ee29ed70dc4bd642f135'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/5b10a88f64c0315cfdef45de0aaaa4eef57de0b7'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/9cae43da9867412f8bd09aee5c8a8dc5e8dc3dc2'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/a71302c8638939c45e4ba5a99ea438185fd3f418'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/b6d46f306b3964d05055ddaa96b58cd8bd3a472c'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/bcb7164258d0a9a8aa2e73ddccc2d78f67d2519d'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/c7441c77c91e47f653104be8353b44a3366a5366'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-265688.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - cve.org
epss: 0.00237
epssPercentile: 0.14884
ingestedAt: '2026-10-15T03:30:12.651Z'
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2024-05-28T19:59:53.031569Z'
---

## Overview

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

hv_netvsc: Register VF in netvsc_probe if NET_DEVICE_REGISTER missed

If hv_netvsc driver is unloaded and reloaded, the NET_DEVICE_REGISTER
handler cannot perform VF register successfully as the register call
is received before netvsc_probe is finished. This is because we
register register_netdevice_notifier() very early( even before
vmbus_driver_register()).
To fix this, we try to register each such matching VF( if it is visible
as a netdevice) at the end of netvsc_probe.

## Affected

- `linux_kernel >= 4.19.301, < 4.19.310`
- `linux_kernel >= 5.4.263, < 5.4.272`
- `linux_kernel >= 5.10.203, < 5.10.213`
- `linux_kernel >= 5.15.141, < 5.15.152`
- `linux_kernel >= 6.1.65, < 6.1.79`
- `linux_kernel >= 6.6.4, < 6.6.18`
- `linux_kernel >= 6.7, < 6.7.6`
- `linux_kernel = 6.8`
- `debian_linux = 10.0`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.7.6`