---
id: CVE-2026-72229
title: 'batman-adv: clean untagged VLAN on netdev registration failure'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  batman-adv: clean untagged VLAN on netdev registration failure

  When an mesh interface is registered, it creates an untagged struct
  batadv_meshif_vlan on top of it via …
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 5d2c05b213377694a2aa8ce1ed9b23f7c39b0569 <
    86e32dfb6a6fe29898f4a562b7b6e38e480bba4d
  - >-
    Linux >= 5d2c05b213377694a2aa8ce1ed9b23f7c39b0569 <
    06ae245168268b705a204f93c318b30107d10e92
  - >-
    Linux >= 5d2c05b213377694a2aa8ce1ed9b23f7c39b0569 <
    dbca15fcbeed5276af440a53aed3901590fa7fc9
  - >-
    Linux >= 5d2c05b213377694a2aa8ce1ed9b23f7c39b0569 <
    f2423da55976ea249f73029e468aefda4b94acba
  - >-
    Linux >= 5d2c05b213377694a2aa8ce1ed9b23f7c39b0569 <
    f15ca6250591cfe78408114a54eaa8d58da51bfa
  - >-
    Linux >= 5d2c05b213377694a2aa8ce1ed9b23f7c39b0569 <
    c945f6007e7851e74706c72f98763023699bcd97
  - >-
    Linux >= 5d2c05b213377694a2aa8ce1ed9b23f7c39b0569 <
    5a82c558098889cc8bfff85cc62f563833205d91
  - >-
    Linux >= 5d2c05b213377694a2aa8ce1ed9b23f7c39b0569 <
    8669a550c752d86baebc5fdc83b8ff35c4372c0e
  - Linux 3.13
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-06T16:53:08.171910Z'
published: '2026-08-15'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T16:55:23.183Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-72229'
references:
  - url: 'https://git.kernel.org/stable/c/86e32dfb6a6fe29898f4a562b7b6e38e480bba4d'
  - url: 'https://git.kernel.org/stable/c/06ae245168268b705a204f93c318b30107d10e92'
  - url: 'https://git.kernel.org/stable/c/dbca15fcbeed5276af440a53aed3901590fa7fc9'
  - url: 'https://git.kernel.org/stable/c/f2423da55976ea249f73029e468aefda4b94acba'
  - url: 'https://git.kernel.org/stable/c/f15ca6250591cfe78408114a54eaa8d58da51bfa'
  - url: 'https://git.kernel.org/stable/c/c945f6007e7851e74706c72f98763023699bcd97'
  - url: 'https://git.kernel.org/stable/c/5a82c558098889cc8bfff85cc62f563833205d91'
  - url: 'https://git.kernel.org/stable/c/8669a550c752d86baebc5fdc83b8ff35c4372c0e'
tags:
  - cve.org
epss: 0.0022
epssPercentile: 0.1254
ingestedAt: '2026-11-06T18:00:12.584Z'
---

## Overview

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

batman-adv: clean untagged VLAN on netdev registration failure

When an mesh interface is registered, it creates an untagged struct
batadv_meshif_vlan on top of it via the NETDEV_REGISTER notifier. But in
this process, another receiver of this notification can veto the
registration. The netdev registration will be aborted because of this veto.

The register_netdevice() call will try to clean up the net_device using
unregister_netdevice_queue() - which only uses the .priv_destructor to
free private resources. In this situation, .dellink will not be called.

The cleanup of the untagged batadv_meshif_vlan must thefore be done in the
destructor to avoid a leak of this object.

## Affected

- `Linux >= 5d2c05b213377694a2aa8ce1ed9b23f7c39b0569 < 86e32dfb6a6fe29898f4a562b7b6e38e480bba4d`
- `Linux >= 5d2c05b213377694a2aa8ce1ed9b23f7c39b0569 < 06ae245168268b705a204f93c318b30107d10e92`
- `Linux >= 5d2c05b213377694a2aa8ce1ed9b23f7c39b0569 < dbca15fcbeed5276af440a53aed3901590fa7fc9`
- `Linux >= 5d2c05b213377694a2aa8ce1ed9b23f7c39b0569 < f2423da55976ea249f73029e468aefda4b94acba`
- `Linux >= 5d2c05b213377694a2aa8ce1ed9b23f7c39b0569 < f15ca6250591cfe78408114a54eaa8d58da51bfa`
- `Linux >= 5d2c05b213377694a2aa8ce1ed9b23f7c39b0569 < c945f6007e7851e74706c72f98763023699bcd97`
- `Linux >= 5d2c05b213377694a2aa8ce1ed9b23f7c39b0569 < 5a82c558098889cc8bfff85cc62f563833205d91`
- `Linux >= 5d2c05b213377694a2aa8ce1ed9b23f7c39b0569 < 8669a550c752d86baebc5fdc83b8ff35c4372c0e`
- `Linux 3.13`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.