---
id: CVE-2024-26897
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: ath9k: delay all of ath9k_wmi_event_tasklet() until init is complete

  The ath9k_wmi_event_tasklet() used in ath9k_htc assumes that all the data
  structures have be…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: ath9k: delay all of ath9k_wmi_event_tasklet() until init is complete

  The ath9k_wmi_event_tasklet() used in ath9k_htc assumes that all the data
  structures have be…
severity: medium
cvss: 4.7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-362
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 5.10.136, < 5.10.214'
  - 'linux_kernel >= 5.15.17, < 5.15.153'
  - 'linux_kernel >= 5.16.3, < 6.1.83'
  - 'linux_kernel >= 6.2, < 6.6.23'
  - 'linux_kernel >= 6.7, < 6.7.11'
  - 'linux_kernel >= 6.8, < 6.8.2'
  - debian_linux = 10.0
patched:
  - linux_kernel 6.8.2
published: '2024-04-17'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T01:17:30.357'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2024-26897'
references:
  - url: 'https://git.kernel.org/stable/c/1bc5461a21c56a36e2a7d81e152b90ce019a3905'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/24355fcb0d4cbcb6ddda262596558e8cfba70f11'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/4afa0246656d5680c8a4c3fb37ba6570c4ab819b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/74d0639261dd795dce958d1b14815bdcbb48a715'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a015fbf698c8957aa5fbeefc5c59dd2cf3107298'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ac90e22e735bac44f74b5161fb096fbeb0ff8bc2'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f8ff4b4df71e87f609be0cc37d92e918107f9b90'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/1bc5461a21c56a36e2a7d81e152b90ce019a3905'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/24355fcb0d4cbcb6ddda262596558e8cfba70f11'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/4afa0246656d5680c8a4c3fb37ba6570c4ab819b'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/74d0639261dd795dce958d1b14815bdcbb48a715'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/a015fbf698c8957aa5fbeefc5c59dd2cf3107298'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/ac90e22e735bac44f74b5161fb096fbeb0ff8bc2'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/f8ff4b4df71e87f609be0cc37d92e918107f9b90'
    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://cert-portal.siemens.com/productcert/html/ssa-265688.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - cve.org
epss: 0.00188
epssPercentile: 0.08285
ingestedAt: '2026-10-15T03:30:12.659Z'
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2024-09-10T15:48:09.627095Z'
---

## Overview

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

wifi: ath9k: delay all of ath9k_wmi_event_tasklet() until init is complete

The ath9k_wmi_event_tasklet() used in ath9k_htc assumes that all the data
structures have been fully initialised by the time it runs. However, because of
the order in which things are initialised, this is not guaranteed to be the
case, because the device is exposed to the USB subsystem before the ath9k driver
initialisation is completed.

We already committed a partial fix for this in commit:
8b3046abc99e ("ath9k_htc: fix NULL pointer dereference at ath9k_htc_tx_get_packet()")

However, that commit only aborted the WMI_TXSTATUS_EVENTID command in the event
tasklet, pairing it with an "initialisation complete" bit in the TX struct. It
seems syzbot managed to trigger the race for one of the other commands as well,
so let's just move the existing synchronisation bit to cover the whole
tasklet (setting it at the end of ath9k_htc_probe_device() instead of inside
ath9k_tx_init()).

## Affected

- `linux_kernel >= 5.10.136, < 5.10.214`
- `linux_kernel >= 5.15.17, < 5.15.153`
- `linux_kernel >= 5.16.3, < 6.1.83`
- `linux_kernel >= 6.2, < 6.6.23`
- `linux_kernel >= 6.7, < 6.7.11`
- `linux_kernel >= 6.8, < 6.8.2`
- `debian_linux = 10.0`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.8.2`