---
id: CVE-2026-74408
title: 'wifi: ath9k: fix OOB access from firmware tx status queue ID'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: ath9k: fix OOB access from firmware tx status queue ID

  ath_tx_edma_tasklet() accesses sc->tx.txq[ts.qid] where ts.qid is a
  4-bit hardware field (0-15), but the t…
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 >= fce041beb03f93c7a771f0b4b6c45bb71ef90901 <
    fb11083db9d7d6fb8f98bbba1cbfcf3fb7b4bf54
  - >-
    Linux >= fce041beb03f93c7a771f0b4b6c45bb71ef90901 <
    734db72d55ca578a344dfa33e30145032c074b25
  - >-
    Linux >= fce041beb03f93c7a771f0b4b6c45bb71ef90901 <
    f5931d06b45ed402572bfe5832fff15864ef5481
  - >-
    Linux >= fce041beb03f93c7a771f0b4b6c45bb71ef90901 <
    46ca1451f61b598f45cb5259e066d305444d95fc
  - >-
    Linux >= fce041beb03f93c7a771f0b4b6c45bb71ef90901 <
    a9e055ac62cb3fcea262d4b687ec73eed82b3379
  - >-
    Linux >= fce041beb03f93c7a771f0b4b6c45bb71ef90901 <
    5435fd3edcb11c7cc4002847c83e9a50b49284dc
  - >-
    Linux >= fce041beb03f93c7a771f0b4b6c45bb71ef90901 <
    336d4c8cd9b1646060ee690c881d465dfc09c6c0
  - >-
    Linux >= fce041beb03f93c7a771f0b4b6c45bb71ef90901 <
    7ce2f118a2389e8f0a64068c6fe7cc7d40639be0
  - Linux 3.1
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T18:55:57.152844Z'
published: '2026-08-15'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T19:05:43.633Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-74408'
references:
  - url: 'https://git.kernel.org/stable/c/fb11083db9d7d6fb8f98bbba1cbfcf3fb7b4bf54'
  - url: 'https://git.kernel.org/stable/c/734db72d55ca578a344dfa33e30145032c074b25'
  - url: 'https://git.kernel.org/stable/c/f5931d06b45ed402572bfe5832fff15864ef5481'
  - url: 'https://git.kernel.org/stable/c/46ca1451f61b598f45cb5259e066d305444d95fc'
  - url: 'https://git.kernel.org/stable/c/a9e055ac62cb3fcea262d4b687ec73eed82b3379'
  - url: 'https://git.kernel.org/stable/c/5435fd3edcb11c7cc4002847c83e9a50b49284dc'
  - url: 'https://git.kernel.org/stable/c/336d4c8cd9b1646060ee690c881d465dfc09c6c0'
  - url: 'https://git.kernel.org/stable/c/7ce2f118a2389e8f0a64068c6fe7cc7d40639be0'
tags:
  - cve.org
epss: 0.00412
epssPercentile: 0.33948
ingestedAt: '2026-10-16T19:46:24.365Z'
---

## Overview

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

wifi: ath9k: fix OOB access from firmware tx status queue ID

ath_tx_edma_tasklet() accesses sc->tx.txq[ts.qid] where ts.qid is a
4-bit hardware field (0-15), but the txq array only has
ATH9K_NUM_TX_QUEUES (10) entries. A qid >= 10 causes an OOB array
access.

Add a bounds check on ts.qid before using it as an array index.

## Affected

- `Linux >= fce041beb03f93c7a771f0b4b6c45bb71ef90901 < fb11083db9d7d6fb8f98bbba1cbfcf3fb7b4bf54`
- `Linux >= fce041beb03f93c7a771f0b4b6c45bb71ef90901 < 734db72d55ca578a344dfa33e30145032c074b25`
- `Linux >= fce041beb03f93c7a771f0b4b6c45bb71ef90901 < f5931d06b45ed402572bfe5832fff15864ef5481`
- `Linux >= fce041beb03f93c7a771f0b4b6c45bb71ef90901 < 46ca1451f61b598f45cb5259e066d305444d95fc`
- `Linux >= fce041beb03f93c7a771f0b4b6c45bb71ef90901 < a9e055ac62cb3fcea262d4b687ec73eed82b3379`
- `Linux >= fce041beb03f93c7a771f0b4b6c45bb71ef90901 < 5435fd3edcb11c7cc4002847c83e9a50b49284dc`
- `Linux >= fce041beb03f93c7a771f0b4b6c45bb71ef90901 < 336d4c8cd9b1646060ee690c881d465dfc09c6c0`
- `Linux >= fce041beb03f93c7a771f0b4b6c45bb71ef90901 < 7ce2f118a2389e8f0a64068c6fe7cc7d40639be0`
- `Linux 3.1`

## Remediation

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