---
id: CVE-2026-43110
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: brcmfmac: validate bsscfg indices in IF events

  brcmf_fweh_handle_if_event() validates the firmware-provided interface
  index before it touches drvr->iflist[], but…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: brcmfmac: validate bsscfg indices in IF events

  brcmf_fweh_handle_if_event() validates the firmware-provided interface
  index before it touches drvr->iflist[], but…
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'
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 3.9, < 6.6.136'
  - 'linux_kernel >= 6.7, < 6.12.83'
  - 'linux_kernel >= 6.13, < 6.18.24'
  - 'linux_kernel >= 6.19, < 6.19.14'
  - linux_kernel = 7.0
patched:
  - linux_kernel 6.19.14
published: '2026-05-06'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T02:19:31.050'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-43110'
references:
  - url: 'https://git.kernel.org/stable/c/1ae1e1caa428844e481231f6dbe9b4f475f1d52d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/2ae3ccb78c0a9ef5ee3d80d02ab319ac1d5af734'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/304950a467d83678bd0b0f46331882e2ac23b12d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/3ec7437e9d11374105c2c4e47ae671537729d7e6'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9c81bcc2c695e0082012a2a3d36a0eefaa51579c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9fca68c2512a362cad258e4df12a307bb2ee4b8e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b329fbcf075949a038045d8e9b86ae3d5bbd8a54'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b427c2b05222db36d32ee141609de6128e9091bb'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-784472.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - cve.org
epss: 0.00244
epssPercentile: 0.14528
ingestedAt: '2026-10-15T03:30:12.872Z'
---

## Overview

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

wifi: brcmfmac: validate bsscfg indices in IF events

brcmf_fweh_handle_if_event() validates the firmware-provided interface
index before it touches drvr->iflist[], but it still uses the raw
bsscfgidx field as an array index without a matching range check.

Reject IF events whose bsscfg index does not fit in drvr->iflist[]
before indexing the interface array.

[add missing wifi prefix]

## Affected

- `linux_kernel >= 3.9, < 6.6.136`
- `linux_kernel >= 6.7, < 6.12.83`
- `linux_kernel >= 6.13, < 6.18.24`
- `linux_kernel >= 6.19, < 6.19.14`
- `linux_kernel = 7.0`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.19.14`