---
id: CVE-2026-68353
title: 'wifi: ath6kl: fix OOB read from firmware num_msg in TX complete handler'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: ath6kl: fix OOB read from firmware num_msg in TX complete handler

  The firmware-controlled num_msg field (u8, 0-255) drives the loop in
  ath6kl_wmi_tx_complete_eve…
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= bdcd81707973cf8aa9305337166f8ee842a050d4 <
    5297299c3fa6133275db0be99d69cd759b6cbfe9
  - >-
    Linux >= bdcd81707973cf8aa9305337166f8ee842a050d4 <
    35196a07603f8c94a4943093bc26d5b5826285f8
  - >-
    Linux >= bdcd81707973cf8aa9305337166f8ee842a050d4 <
    0e0fc04af9b443c6b425f00fb604ff599bc80d1d
  - >-
    Linux >= bdcd81707973cf8aa9305337166f8ee842a050d4 <
    69ac7ba3a3df6654e7daa82674575a8c4a1a63ea
  - >-
    Linux >= bdcd81707973cf8aa9305337166f8ee842a050d4 <
    289edc3c71344b89e6522891147cfb8f61b088bb
  - >-
    Linux >= bdcd81707973cf8aa9305337166f8ee842a050d4 <
    eb636fbc443149b3501c3f97e26225ddcb314a0f
  - >-
    Linux >= bdcd81707973cf8aa9305337166f8ee842a050d4 <
    c38b0d5c661951b5dd082bdf31f8a57a0ce6e540
  - >-
    Linux >= bdcd81707973cf8aa9305337166f8ee842a050d4 <
    3a21c89215cc18f1a97c5e5bfd1da6d4f3d44495
  - Linux 3.2
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-16T15:47:25.988106Z'
published: '2026-08-10'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T15:53:09.345Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-68353'
references:
  - url: 'https://git.kernel.org/stable/c/5297299c3fa6133275db0be99d69cd759b6cbfe9'
  - url: 'https://git.kernel.org/stable/c/35196a07603f8c94a4943093bc26d5b5826285f8'
  - url: 'https://git.kernel.org/stable/c/0e0fc04af9b443c6b425f00fb604ff599bc80d1d'
  - url: 'https://git.kernel.org/stable/c/69ac7ba3a3df6654e7daa82674575a8c4a1a63ea'
  - url: 'https://git.kernel.org/stable/c/289edc3c71344b89e6522891147cfb8f61b088bb'
  - url: 'https://git.kernel.org/stable/c/eb636fbc443149b3501c3f97e26225ddcb314a0f'
  - url: 'https://git.kernel.org/stable/c/c38b0d5c661951b5dd082bdf31f8a57a0ce6e540'
  - url: 'https://git.kernel.org/stable/c/3a21c89215cc18f1a97c5e5bfd1da6d4f3d44495'
tags:
  - cve.org
epss: 0.00286
epssPercentile: 0.19757
ingestedAt: '2026-10-16T17:24:46.860Z'
---

## Overview

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

wifi: ath6kl: fix OOB read from firmware num_msg in TX complete handler

The firmware-controlled num_msg field (u8, 0-255) drives the loop in
ath6kl_wmi_tx_complete_event_rx() without validation against the buffer
length. This allows out-of-bounds reads of up to 1020 bytes past the
WMI event buffer when the firmware sends an inflated num_msg.

Add a check that the buffer is large enough to hold the fixed struct
and the num_msg variable-length entries.

## Affected

- `Linux >= bdcd81707973cf8aa9305337166f8ee842a050d4 < 5297299c3fa6133275db0be99d69cd759b6cbfe9`
- `Linux >= bdcd81707973cf8aa9305337166f8ee842a050d4 < 35196a07603f8c94a4943093bc26d5b5826285f8`
- `Linux >= bdcd81707973cf8aa9305337166f8ee842a050d4 < 0e0fc04af9b443c6b425f00fb604ff599bc80d1d`
- `Linux >= bdcd81707973cf8aa9305337166f8ee842a050d4 < 69ac7ba3a3df6654e7daa82674575a8c4a1a63ea`
- `Linux >= bdcd81707973cf8aa9305337166f8ee842a050d4 < 289edc3c71344b89e6522891147cfb8f61b088bb`
- `Linux >= bdcd81707973cf8aa9305337166f8ee842a050d4 < eb636fbc443149b3501c3f97e26225ddcb314a0f`
- `Linux >= bdcd81707973cf8aa9305337166f8ee842a050d4 < c38b0d5c661951b5dd082bdf31f8a57a0ce6e540`
- `Linux >= bdcd81707973cf8aa9305337166f8ee842a050d4 < 3a21c89215cc18f1a97c5e5bfd1da6d4f3d44495`
- `Linux 3.2`

## Remediation

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