---
id: CVE-2026-43172
title: 'wifi: iwlwifi: fix 22000 series SMEM parsing'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: iwlwifi: fix 22000 series SMEM parsing

  If the firmware were to report three LMACs (which doesn't
  exist in hardware) then using "fwrt->smem_cfg.lmac[2]" is
  an ove…
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 >= ebfa7f8ae155c9a0bb2e4038d6b5d8b14881c424 <
    1d49a42717bdc8de77eabeb5b7d3e88d141ffea9
  - >-
    Linux >= ebfa7f8ae155c9a0bb2e4038d6b5d8b14881c424 <
    2b4b1510aaaf5b9fb57327ecffc20c055f61f205
  - >-
    Linux >= ebfa7f8ae155c9a0bb2e4038d6b5d8b14881c424 <
    58192b9ce09b0f0f86e2036683bd542130b91a98
  - Linux 5.8
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T15:15:17.444168Z'
published: '2026-05-06'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T15:20:34.994Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-43172'
references:
  - url: 'https://git.kernel.org/stable/c/1d49a42717bdc8de77eabeb5b7d3e88d141ffea9'
  - url: 'https://git.kernel.org/stable/c/2b4b1510aaaf5b9fb57327ecffc20c055f61f205'
  - url: 'https://git.kernel.org/stable/c/58192b9ce09b0f0f86e2036683bd542130b91a98'
tags:
  - cve.org
epss: 0.00375
epssPercentile: 0.29897
ingestedAt: '2026-10-16T17:24:46.686Z'
---

## Overview

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

wifi: iwlwifi: fix 22000 series SMEM parsing

If the firmware were to report three LMACs (which doesn't
exist in hardware) then using "fwrt->smem_cfg.lmac[2]" is
an overrun of the array. Reject such and use IWL_FW_CHECK
instead of WARN_ON in this function.

## Affected

- `Linux >= ebfa7f8ae155c9a0bb2e4038d6b5d8b14881c424 < 1d49a42717bdc8de77eabeb5b7d3e88d141ffea9`
- `Linux >= ebfa7f8ae155c9a0bb2e4038d6b5d8b14881c424 < 2b4b1510aaaf5b9fb57327ecffc20c055f61f205`
- `Linux >= ebfa7f8ae155c9a0bb2e4038d6b5d8b14881c424 < 58192b9ce09b0f0f86e2036683bd542130b91a98`
- `Linux 5.8`

## Remediation

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