---
id: CVE-2025-23133
title: 'wifi: ath11k: update channel list in reg notifier instead reg worker'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: ath11k: update channel list in reg notifier instead reg worker

  Currently when ath11k gets a new channel list, it will be processed
  according to the following ste…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= f45cb6b29cd36514e13f7519770873d8c0457008 <
    ec97bd5378c594be1f1c7a15dcf381e075b665d9
  - >-
    Linux >= f45cb6b29cd36514e13f7519770873d8c0457008 <
    26618c039b78a76c373d4e02c5fbd52e3a73aead
  - >-
    Linux >= f45cb6b29cd36514e13f7519770873d8c0457008 <
    f952fb83c9c6f908d27500764c4aee1df04b9d3f
  - >-
    Linux >= f45cb6b29cd36514e13f7519770873d8c0457008 <
    933ab187e679e6fbdeea1835ae39efcc59c022d2
  - Linux f96fd36936310cefe0ea1370a9ae30e6746e6f62
  - Linux c97b120950b49d76bdce013bd4d9577d769465f4
  - Linux >= 5.15.79 < 5.16
  - Linux >= 6.0.9 < 6.1
  - Linux 6.1
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-15T21:44:40.826018Z'
published: '2025-04-16'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T12:36:20.439Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2025-23133'
references:
  - url: 'https://git.kernel.org/stable/c/ec97bd5378c594be1f1c7a15dcf381e075b665d9'
  - url: 'https://git.kernel.org/stable/c/26618c039b78a76c373d4e02c5fbd52e3a73aead'
  - url: 'https://git.kernel.org/stable/c/f952fb83c9c6f908d27500764c4aee1df04b9d3f'
  - url: 'https://git.kernel.org/stable/c/933ab187e679e6fbdeea1835ae39efcc59c022d2'
tags:
  - cve.org
epss: 0.00307
epssPercentile: 0.23329
ingestedAt: '2026-10-15T22:48:25.475Z'
---

## Overview

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

wifi: ath11k: update channel list in reg notifier instead reg worker

Currently when ath11k gets a new channel list, it will be processed
according to the following steps:
1. update new channel list to cfg80211 and queue reg_work.
2. cfg80211 handles new channel list during reg_work.
3. update cfg80211's handled channel list to firmware by
ath11k_reg_update_chan_list().

But ath11k will immediately execute step 3 after reg_work is just
queued. Since step 2 is asynchronous, cfg80211 may not have completed
handling the new channel list, which may leading to an out-of-bounds
write error:
BUG: KASAN: slab-out-of-bounds in ath11k_reg_update_chan_list
Call Trace:
    ath11k_reg_update_chan_list+0xbfe/0xfe0 [ath11k]
    kfree+0x109/0x3a0
    ath11k_regd_update+0x1cf/0x350 [ath11k]
    ath11k_regd_update_work+0x14/0x20 [ath11k]
    process_one_work+0xe35/0x14c0

Should ensure step 2 is completely done before executing step 3. Thus
Wen raised patch[1]. When flag NL80211_REGDOM_SET_BY_DRIVER is set,
cfg80211 will notify ath11k after step 2 is done.

So enable the flag NL80211_REGDOM_SET_BY_DRIVER then cfg80211 will
notify ath11k after step 2 is done. At this time, there will be no
KASAN bug during the execution of the step 3.

[1] https://patchwork.kernel.org/project/linux-wireless/patch/20230201065313.27203-1-quic_wgong@quicinc.com/

Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3

## Affected

- `Linux >= f45cb6b29cd36514e13f7519770873d8c0457008 < ec97bd5378c594be1f1c7a15dcf381e075b665d9`
- `Linux >= f45cb6b29cd36514e13f7519770873d8c0457008 < 26618c039b78a76c373d4e02c5fbd52e3a73aead`
- `Linux >= f45cb6b29cd36514e13f7519770873d8c0457008 < f952fb83c9c6f908d27500764c4aee1df04b9d3f`
- `Linux >= f45cb6b29cd36514e13f7519770873d8c0457008 < 933ab187e679e6fbdeea1835ae39efcc59c022d2`
- `Linux f96fd36936310cefe0ea1370a9ae30e6746e6f62`
- `Linux c97b120950b49d76bdce013bd4d9577d769465f4`
- `Linux >= 5.15.79 < 5.16`
- `Linux >= 6.0.9 < 6.1`
- `Linux 6.1`

## Remediation

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