---
id: CVE-2026-68355
title: 'wifi: ath11k: fix potential buffer underflow in ath11k_hal_rx_msdu_list_get()'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: ath11k: fix potential buffer underflow in ath11k_hal_rx_msdu_list_get()

  When the first entry in msdu_details has a zero buffer address,
  the code accesses msdu_de…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= d5c65159f2895379e11ca13f62feabe93278985d <
    085a5fde5bac29c01059e69399b417e91c0a6c18
  - >-
    Linux >= d5c65159f2895379e11ca13f62feabe93278985d <
    31ea4b175bc3ab430be15834d9ee8a1ce65bee15
  - >-
    Linux >= d5c65159f2895379e11ca13f62feabe93278985d <
    20d18a5ec6ec364fcaf0d03af6fc43dcc42c6591
  - >-
    Linux >= d5c65159f2895379e11ca13f62feabe93278985d <
    69a6a4f60b2da92c0bdfd9264b8ffe053f51f52a
  - >-
    Linux >= d5c65159f2895379e11ca13f62feabe93278985d <
    904367381a922aa2dc3e8bd2488e6c9180516c7a
  - >-
    Linux >= d5c65159f2895379e11ca13f62feabe93278985d <
    a154ca3c441a67d36b3a9ea63a4f11b06abe6223
  - >-
    Linux >= d5c65159f2895379e11ca13f62feabe93278985d <
    725c1c3a8c5d920a7d3f5887412f2ad8e95a74f5
  - >-
    Linux >= d5c65159f2895379e11ca13f62feabe93278985d <
    7f11e70629650ff6ea140984e5ce188b775b2683
  - Linux 5.6
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-06T16:48:00.630554Z'
published: '2026-08-10'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T16:55:14.218Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-68355'
references:
  - url: 'https://git.kernel.org/stable/c/085a5fde5bac29c01059e69399b417e91c0a6c18'
  - url: 'https://git.kernel.org/stable/c/31ea4b175bc3ab430be15834d9ee8a1ce65bee15'
  - url: 'https://git.kernel.org/stable/c/20d18a5ec6ec364fcaf0d03af6fc43dcc42c6591'
  - url: 'https://git.kernel.org/stable/c/69a6a4f60b2da92c0bdfd9264b8ffe053f51f52a'
  - url: 'https://git.kernel.org/stable/c/904367381a922aa2dc3e8bd2488e6c9180516c7a'
  - url: 'https://git.kernel.org/stable/c/a154ca3c441a67d36b3a9ea63a4f11b06abe6223'
  - url: 'https://git.kernel.org/stable/c/725c1c3a8c5d920a7d3f5887412f2ad8e95a74f5'
  - url: 'https://git.kernel.org/stable/c/7f11e70629650ff6ea140984e5ce188b775b2683'
tags:
  - cve.org
epss: 0.00184
epssPercentile: 0.08081
ingestedAt: '2026-11-06T18:00:12.608Z'
---

## Overview

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

wifi: ath11k: fix potential buffer underflow in ath11k_hal_rx_msdu_list_get()

When the first entry in msdu_details has a zero buffer address,
the code accesses msdu_details[i - 1] with i == 0, causing a
buffer underflow.

Fix similarly to ath12k_wifi7_hal_rx_msdu_list_get() by adding
a separate check for i == 0 before the main condition to prevent
the out-of-bounds access.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

## Affected

- `Linux >= d5c65159f2895379e11ca13f62feabe93278985d < 085a5fde5bac29c01059e69399b417e91c0a6c18`
- `Linux >= d5c65159f2895379e11ca13f62feabe93278985d < 31ea4b175bc3ab430be15834d9ee8a1ce65bee15`
- `Linux >= d5c65159f2895379e11ca13f62feabe93278985d < 20d18a5ec6ec364fcaf0d03af6fc43dcc42c6591`
- `Linux >= d5c65159f2895379e11ca13f62feabe93278985d < 69a6a4f60b2da92c0bdfd9264b8ffe053f51f52a`
- `Linux >= d5c65159f2895379e11ca13f62feabe93278985d < 904367381a922aa2dc3e8bd2488e6c9180516c7a`
- `Linux >= d5c65159f2895379e11ca13f62feabe93278985d < a154ca3c441a67d36b3a9ea63a4f11b06abe6223`
- `Linux >= d5c65159f2895379e11ca13f62feabe93278985d < 725c1c3a8c5d920a7d3f5887412f2ad8e95a74f5`
- `Linux >= d5c65159f2895379e11ca13f62feabe93278985d < 7f11e70629650ff6ea140984e5ce188b775b2683`
- `Linux 5.6`

## Remediation

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