---
id: CVE-2025-38450
title: >-
  wifi: mt76: mt7925: prevent NULL pointer dereference in
  mt7925_sta_set_decap_offload()
summary: >-
  In the Linux kernel, the following vulnerability has been resolved:


  wifi: mt76: mt7925: prevent NULL pointer dereference in
  mt7925_sta_set_decap_offload()


  Add a NULL check for msta->vif before accessing its members to prevent

  a kernel …
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= b859ad65309a5f1654e8b284de582831fc88e2d8 <
    9b50874f297fcc62adc7396f35209878e51010b0
  - >-
    Linux >= b859ad65309a5f1654e8b284de582831fc88e2d8 <
    91c3dec2453b3742e8f666957b99945edc30577f
  - >-
    Linux >= b859ad65309a5f1654e8b284de582831fc88e2d8 <
    35ad47c0b3da04b00b19a8b9ed5632e2f2520472
  - Linux 6.11
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-05T20:57:04.118611Z'
published: '2025-07-25'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T21:02:39.009Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2025-38450'
references:
  - url: 'https://git.kernel.org/stable/c/9b50874f297fcc62adc7396f35209878e51010b0'
  - url: 'https://git.kernel.org/stable/c/91c3dec2453b3742e8f666957b99945edc30577f'
  - url: 'https://git.kernel.org/stable/c/35ad47c0b3da04b00b19a8b9ed5632e2f2520472'
tags:
  - cve.org
epss: 0.00176
epssPercentile: 0.0711
ingestedAt: '2026-11-05T22:38:31.972Z'
---

## Overview

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

wifi: mt76: mt7925: prevent NULL pointer dereference in mt7925_sta_set_decap_offload()

Add a NULL check for msta->vif before accessing its members to prevent
a kernel panic in AP mode deployment. This also fix the issue reported
in [1].

The crash occurs when this function is triggered before the station is
fully initialized. The call trace shows a page fault at
mt7925_sta_set_decap_offload() due to accessing resources when msta->vif
is NULL.

Fix this by adding an early return if msta->vif is NULL and also check
wcid.sta is ready. This ensures we only proceed with decap offload
configuration when the station's state is properly initialized.

[14739.655703] Unable to handle kernel paging request at virtual address ffffffffffffffa0
[14739.811820] CPU: 0 UID: 0 PID: 895854 Comm: hostapd Tainted: G
[14739.821394] Tainted: [C]=CRAP, [O]=OOT_MODULE
[14739.825746] Hardware name: Raspberry Pi 4 Model B Rev 1.1 (DT)
[14739.831577] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[14739.838538] pc : mt7925_sta_set_decap_offload+0xc0/0x1b8 [mt7925_common]
[14739.845271] lr : mt7925_sta_set_decap_offload+0x58/0x1b8 [mt7925_common]
[14739.851985] sp : ffffffc085efb500
[14739.855295] x29: ffffffc085efb500 x28: 0000000000000000 x27: ffffff807803a158
[14739.862436] x26: ffffff8041ececb8 x25: 0000000000000001 x24: 0000000000000001
[14739.869577] x23: 0000000000000001 x22: 0000000000000008 x21: ffffff8041ecea88
[14739.876715] x20: ffffff8041c19ca0 x19: ffffff8078031fe0 x18: 0000000000000000
[14739.883853] x17: 0000000000000000 x16: ffffffe2aeac1110 x15: 000000559da48080
[14739.890991] x14: 0000000000000001 x13: 0000000000000000 x12: 0000000000000000
[14739.898130] x11: 0a10020001008e88 x10: 0000000000001a50 x9 : ffffffe26457bfa0
[14739.905269] x8 : ffffff8042013bb0 x7 : ffffff807fb6cbf8 x6 : dead000000000100
[14739.912407] x5 : dead000000000122 x4 : ffffff80780326c8 x3 : 0000000000000000
[14739.919546] x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffffff8041ececb8
[14739.926686] Call trace:
[14739.929130]  mt7925_sta_set_decap_offload+0xc0/0x1b8 [mt7925_common]
[14739.935505]  ieee80211_check_fast_rx+0x19c/0x510 [mac80211]
[14739.941344]  _sta_info_move_state+0xe4/0x510 [mac80211]
[14739.946860]  sta_info_move_state+0x1c/0x30 [mac80211]
[14739.952116]  sta_apply_auth_flags.constprop.0+0x90/0x1b0 [mac80211]
[14739.958708]  sta_apply_parameters+0x234/0x5e0 [mac80211]
[14739.964332]  ieee80211_add_station+0xdc/0x190 [mac80211]
[14739.969950]  nl80211_new_station+0x46c/0x670 [cfg80211]
[14739.975516]  genl_family_rcv_msg_doit+0xdc/0x150
[14739.980158]  genl_rcv_msg+0x218/0x298
[14739.983830]  netlink_rcv_skb+0x64/0x138
[14739.987670]  genl_rcv+0x40/0x60
[14739.990816]  netlink_unicast+0x314/0x380
[14739.994742]  netlink_sendmsg+0x198/0x3f0
[14739.998664]  __sock_sendmsg+0x64/0xc0
[14740.002324]  ____sys_sendmsg+0x260/0x298
[14740.006242]  ___sys_sendmsg+0xb4/0x110

## Affected

- `Linux >= b859ad65309a5f1654e8b284de582831fc88e2d8 < 9b50874f297fcc62adc7396f35209878e51010b0`
- `Linux >= b859ad65309a5f1654e8b284de582831fc88e2d8 < 91c3dec2453b3742e8f666957b99945edc30577f`
- `Linux >= b859ad65309a5f1654e8b284de582831fc88e2d8 < 35ad47c0b3da04b00b19a8b9ed5632e2f2520472`
- `Linux 6.11`

## Remediation

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