---
id: CVE-2026-72070
title: 'wifi: libertas_tf: fix use-after-free in lbtf_free_adapter()'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: libertas_tf: fix use-after-free in lbtf_free_adapter()

  lbtf_free_adapter() calls timer_delete(&priv->command_timer), which does
  not wait for a running command_ti…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 06b16ae5319251c26377afcb401e46056d5673f4 <
    bd75636681588c67006279abdb9a76a708b3ce29
  - >-
    Linux >= 06b16ae5319251c26377afcb401e46056d5673f4 <
    2fba1d3b2f031a2c68e566a6d45cc5b7a8d6683d
  - >-
    Linux >= 06b16ae5319251c26377afcb401e46056d5673f4 <
    9392fd5de555272449d3d8c63410ea00f8ec853a
  - >-
    Linux >= 06b16ae5319251c26377afcb401e46056d5673f4 <
    4714e95f5d61cb9c5c7c6c4e68b618f37bc6ffcf
  - >-
    Linux >= 06b16ae5319251c26377afcb401e46056d5673f4 <
    066b59e84f90d270cc15f0370166155aca507630
  - >-
    Linux >= 06b16ae5319251c26377afcb401e46056d5673f4 <
    fcff712d0e3d183843ec3916470ee6cc3455baad
  - >-
    Linux >= 06b16ae5319251c26377afcb401e46056d5673f4 <
    bcf7968cb97ce4312588042cf2712f04caff6d8f
  - >-
    Linux >= 06b16ae5319251c26377afcb401e46056d5673f4 <
    aa6dcd5c8dd9ba1d7d0f60093bcda41c0d6d438d
  - Linux 2.6.28
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-06T16:51:09.396547Z'
published: '2026-08-15'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T16:55:19.417Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-72070'
references:
  - url: 'https://git.kernel.org/stable/c/bd75636681588c67006279abdb9a76a708b3ce29'
  - url: 'https://git.kernel.org/stable/c/2fba1d3b2f031a2c68e566a6d45cc5b7a8d6683d'
  - url: 'https://git.kernel.org/stable/c/9392fd5de555272449d3d8c63410ea00f8ec853a'
  - url: 'https://git.kernel.org/stable/c/4714e95f5d61cb9c5c7c6c4e68b618f37bc6ffcf'
  - url: 'https://git.kernel.org/stable/c/066b59e84f90d270cc15f0370166155aca507630'
  - url: 'https://git.kernel.org/stable/c/fcff712d0e3d183843ec3916470ee6cc3455baad'
  - url: 'https://git.kernel.org/stable/c/bcf7968cb97ce4312588042cf2712f04caff6d8f'
  - url: 'https://git.kernel.org/stable/c/aa6dcd5c8dd9ba1d7d0f60093bcda41c0d6d438d'
tags:
  - cve.org
epss: 0.0022
epssPercentile: 0.12601
ingestedAt: '2026-11-06T18:00:12.598Z'
---

## Overview

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

wifi: libertas_tf: fix use-after-free in lbtf_free_adapter()

lbtf_free_adapter() calls timer_delete(&priv->command_timer), which does
not wait for a running command_timer_fn() callback. lbtf_free_adapter()
runs on the teardown path right before ieee80211_free_hw() frees priv,
both in lbtf_remove_card() and in the probe error path. command_timer is
armed by mod_timer() in lbtf_cmd() whenever a firmware command is sent.
command_timer_fn() dereferences priv. If a command times out as the
device is removed, command_timer_fn() runs concurrently with teardown and
dereferences priv after it has been freed.

This is the same use-after-free that commit 03cc8f90d053 ("wifi: libertas:
fix use-after-free in lbs_free_adapter()") fixed in the sibling libertas
driver. The libertas_tf variant has the identical pattern and was left
unchanged. Use timer_delete_sync() so any in-flight callback completes
before priv is freed.

## Affected

- `Linux >= 06b16ae5319251c26377afcb401e46056d5673f4 < bd75636681588c67006279abdb9a76a708b3ce29`
- `Linux >= 06b16ae5319251c26377afcb401e46056d5673f4 < 2fba1d3b2f031a2c68e566a6d45cc5b7a8d6683d`
- `Linux >= 06b16ae5319251c26377afcb401e46056d5673f4 < 9392fd5de555272449d3d8c63410ea00f8ec853a`
- `Linux >= 06b16ae5319251c26377afcb401e46056d5673f4 < 4714e95f5d61cb9c5c7c6c4e68b618f37bc6ffcf`
- `Linux >= 06b16ae5319251c26377afcb401e46056d5673f4 < 066b59e84f90d270cc15f0370166155aca507630`
- `Linux >= 06b16ae5319251c26377afcb401e46056d5673f4 < fcff712d0e3d183843ec3916470ee6cc3455baad`
- `Linux >= 06b16ae5319251c26377afcb401e46056d5673f4 < bcf7968cb97ce4312588042cf2712f04caff6d8f`
- `Linux >= 06b16ae5319251c26377afcb401e46056d5673f4 < aa6dcd5c8dd9ba1d7d0f60093bcda41c0d6d438d`
- `Linux 2.6.28`

## Remediation

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