---
id: CVE-2025-38009
title: 'wifi: mt76: disable napi on driver removal'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: mt76: disable napi on driver removal

  A warning on driver removal started occurring after commit 9dd05df8403b
  ("net: warn if NAPI instance wasn't shut down"). Dis…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 2ac515a5d74f26963362d5da9589c67ca3663338 <
    ff0f820fa5b99035b3c654dd531226d8d83aec5f
  - >-
    Linux >= 2ac515a5d74f26963362d5da9589c67ca3663338 <
    ca5b213bf4b4224335a8131a26805d16503fca5f
  - >-
    Linux >= 2ac515a5d74f26963362d5da9589c67ca3663338 <
    b892e830d1ea8c5475254b98827771f7366f1039
  - >-
    Linux >= 2ac515a5d74f26963362d5da9589c67ca3663338 <
    5e700b06b970fc19e3a1ecb244e14785f3fbb8e3
  - >-
    Linux >= 2ac515a5d74f26963362d5da9589c67ca3663338 <
    2b81e76db3667d1f7f2ad44e9835cdaf8dea95a8
  - >-
    Linux >= 2ac515a5d74f26963362d5da9589c67ca3663338 <
    e7bfbda5fddd27f3158e723d641c0fcdfb0552a7
  - >-
    Linux >= 2ac515a5d74f26963362d5da9589c67ca3663338 <
    78ab4be549533432d97ea8989d2f00b508fa68d8
  - Linux 5.2
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-05T20:47:51.039147Z'
published: '2025-06-18'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T20:52:11.851Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2025-38009'
references:
  - url: 'https://git.kernel.org/stable/c/ff0f820fa5b99035b3c654dd531226d8d83aec5f'
  - url: 'https://git.kernel.org/stable/c/ca5b213bf4b4224335a8131a26805d16503fca5f'
  - url: 'https://git.kernel.org/stable/c/b892e830d1ea8c5475254b98827771f7366f1039'
  - url: 'https://git.kernel.org/stable/c/5e700b06b970fc19e3a1ecb244e14785f3fbb8e3'
  - url: 'https://git.kernel.org/stable/c/2b81e76db3667d1f7f2ad44e9835cdaf8dea95a8'
  - url: 'https://git.kernel.org/stable/c/e7bfbda5fddd27f3158e723d641c0fcdfb0552a7'
  - url: 'https://git.kernel.org/stable/c/78ab4be549533432d97ea8989d2f00b508fa68d8'
tags:
  - cve.org
epss: 0.00214
epssPercentile: 0.11814
ingestedAt: '2026-11-05T22:38:31.906Z'
---

## Overview

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

wifi: mt76: disable napi on driver removal

A warning on driver removal started occurring after commit 9dd05df8403b
("net: warn if NAPI instance wasn't shut down"). Disable tx napi before
deleting it in mt76_dma_cleanup().

 WARNING: CPU: 4 PID: 18828 at net/core/dev.c:7288 __netif_napi_del_locked+0xf0/0x100
 CPU: 4 UID: 0 PID: 18828 Comm: modprobe Not tainted 6.15.0-rc4 #4 PREEMPT(lazy)
 Hardware name: ASUS System Product Name/PRIME X670E-PRO WIFI, BIOS 3035 09/05/2024
 RIP: 0010:__netif_napi_del_locked+0xf0/0x100
 Call Trace:
 <TASK>
 mt76_dma_cleanup+0x54/0x2f0 [mt76]
 mt7921_pci_remove+0xd5/0x190 [mt7921e]
 pci_device_remove+0x47/0xc0
 device_release_driver_internal+0x19e/0x200
 driver_detach+0x48/0x90
 bus_remove_driver+0x6d/0xf0
 pci_unregister_driver+0x2e/0xb0
 __do_sys_delete_module.isra.0+0x197/0x2e0
 do_syscall_64+0x7b/0x160
 entry_SYSCALL_64_after_hwframe+0x76/0x7e

Tested with mt7921e but the same pattern can be actually applied to other
mt76 drivers calling mt76_dma_cleanup() during removal. Tx napi is enabled
in their *_dma_init() functions and only toggled off and on again inside
their suspend/resume/reset paths. So it should be okay to disable tx
napi in such a generic way.

Found by Linux Verification Center (linuxtesting.org).

## Affected

- `Linux >= 2ac515a5d74f26963362d5da9589c67ca3663338 < ff0f820fa5b99035b3c654dd531226d8d83aec5f`
- `Linux >= 2ac515a5d74f26963362d5da9589c67ca3663338 < ca5b213bf4b4224335a8131a26805d16503fca5f`
- `Linux >= 2ac515a5d74f26963362d5da9589c67ca3663338 < b892e830d1ea8c5475254b98827771f7366f1039`
- `Linux >= 2ac515a5d74f26963362d5da9589c67ca3663338 < 5e700b06b970fc19e3a1ecb244e14785f3fbb8e3`
- `Linux >= 2ac515a5d74f26963362d5da9589c67ca3663338 < 2b81e76db3667d1f7f2ad44e9835cdaf8dea95a8`
- `Linux >= 2ac515a5d74f26963362d5da9589c67ca3663338 < e7bfbda5fddd27f3158e723d641c0fcdfb0552a7`
- `Linux >= 2ac515a5d74f26963362d5da9589c67ca3663338 < 78ab4be549533432d97ea8989d2f00b508fa68d8`
- `Linux 5.2`

## Remediation

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