---
id: CVE-2026-74408
title: |-
  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…
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'
cwe:
  - CWE-787
vendor: Red Hat
product: Red Hat Enterprise Linux 9
affected:
  - enterprise_linux 10
  - enterprise_linux 6
  - enterprise_linux 7
  - enterprise_linux 8
  - enterprise_linux 9
published: '2026-08-15'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T20:17:26.257'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-74408'
references:
  - url: 'https://git.kernel.org/stable/c/336d4c8cd9b1646060ee690c881d465dfc09c6c0'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/46ca1451f61b598f45cb5259e066d305444d95fc'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5435fd3edcb11c7cc4002847c83e9a50b49284dc'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/734db72d55ca578a344dfa33e30145032c074b25'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/7ce2f118a2389e8f0a64068c6fe7cc7d40639be0'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a9e055ac62cb3fcea262d4b687ec73eed82b3379'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f5931d06b45ed402572bfe5832fff15864ef5481'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/fb11083db9d7d6fb8f98bbba1cbfcf3fb7b4bf54'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74408.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-74408'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2516901'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-74408'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-74408'
  - url: 'https://kernelcve.org/list/?q=CVE-2026-74408'
  - url: >-
      https://lore.kernel.org/linux-cve-announce/2026081510-CVE-2026-74408-09af@gregkh/T
tags:
  - nvd
  - csaf
  - vex
  - red-hat
  - cve.org
  - score-dispute
epss: 0.00412
epssPercentile: 0.35278
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T18:55:57.152844Z'
scores:
  nvd: 8.8
  vendor: 5.3
  cna: 8.8
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.

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-10-26 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74408.json)