---
id: CVE-2026-68199
title: 'wifi: ath6kl: fix OOB access from firmware ADDBA window size'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: ath6kl: fix OOB access from firmware ADDBA window size

  aggr_recv_addba_req_evt() logs a debug message when the firmware-supplied
  win_sz is outside [AGGR_WIN_SZ_M…
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 >= bdcd81707973cf8aa9305337166f8ee842a050d4 <
    c8e3ca7954d8233fbc54bd370c1827670f43c538
  - >-
    Linux >= bdcd81707973cf8aa9305337166f8ee842a050d4 <
    f480d9910fcfe326db3a6281df80e83af347193e
  - >-
    Linux >= bdcd81707973cf8aa9305337166f8ee842a050d4 <
    67bc9af4f41f2bdba20404fbd753b2a1bd6dd352
  - >-
    Linux >= bdcd81707973cf8aa9305337166f8ee842a050d4 <
    d4558c140782180e2c80a7588a4af9f8675adfc4
  - >-
    Linux >= bdcd81707973cf8aa9305337166f8ee842a050d4 <
    5a65fd4722416061698b0a3277222381efbc4882
  - >-
    Linux >= bdcd81707973cf8aa9305337166f8ee842a050d4 <
    58c6c8dc2e022e1b4f3dc58725a1ca49ff470f9c
  - >-
    Linux >= bdcd81707973cf8aa9305337166f8ee842a050d4 <
    cec0a487cf38ac1f9bca240ffe8a94c5014b72f2
  - >-
    Linux >= bdcd81707973cf8aa9305337166f8ee842a050d4 <
    44126b6994eeb28f2103b638e698f40a1244f327
  - Linux 3.2
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T15:45:42.892507Z'
published: '2026-08-10'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T15:53:03.113Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-68199'
references:
  - url: 'https://git.kernel.org/stable/c/c8e3ca7954d8233fbc54bd370c1827670f43c538'
  - url: 'https://git.kernel.org/stable/c/f480d9910fcfe326db3a6281df80e83af347193e'
  - url: 'https://git.kernel.org/stable/c/67bc9af4f41f2bdba20404fbd753b2a1bd6dd352'
  - url: 'https://git.kernel.org/stable/c/d4558c140782180e2c80a7588a4af9f8675adfc4'
  - url: 'https://git.kernel.org/stable/c/5a65fd4722416061698b0a3277222381efbc4882'
  - url: 'https://git.kernel.org/stable/c/58c6c8dc2e022e1b4f3dc58725a1ca49ff470f9c'
  - url: 'https://git.kernel.org/stable/c/cec0a487cf38ac1f9bca240ffe8a94c5014b72f2'
  - url: 'https://git.kernel.org/stable/c/44126b6994eeb28f2103b638e698f40a1244f327'
tags:
  - cve.org
epss: 0.00407
epssPercentile: 0.33421
ingestedAt: '2026-10-16T17:24:46.848Z'
---

## Overview

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

wifi: ath6kl: fix OOB access from firmware ADDBA window size

aggr_recv_addba_req_evt() logs a debug message when the firmware-supplied
win_sz is outside [AGGR_WIN_SZ_MIN, AGGR_WIN_SZ_MAX] but does not
return. The out-of-range win_sz is then used in TID_WINDOW_SZ() to
compute a kzalloc size and stored in rxtid->hold_q_sz, leading to
zero-size or overflowed allocations and subsequent out-of-bounds access.

Clean up any previously active aggregation session for the TID first,
then return early when win_sz is out of the valid range, instead of
proceeding with a broken allocation size.

## Affected

- `Linux >= bdcd81707973cf8aa9305337166f8ee842a050d4 < c8e3ca7954d8233fbc54bd370c1827670f43c538`
- `Linux >= bdcd81707973cf8aa9305337166f8ee842a050d4 < f480d9910fcfe326db3a6281df80e83af347193e`
- `Linux >= bdcd81707973cf8aa9305337166f8ee842a050d4 < 67bc9af4f41f2bdba20404fbd753b2a1bd6dd352`
- `Linux >= bdcd81707973cf8aa9305337166f8ee842a050d4 < d4558c140782180e2c80a7588a4af9f8675adfc4`
- `Linux >= bdcd81707973cf8aa9305337166f8ee842a050d4 < 5a65fd4722416061698b0a3277222381efbc4882`
- `Linux >= bdcd81707973cf8aa9305337166f8ee842a050d4 < 58c6c8dc2e022e1b4f3dc58725a1ca49ff470f9c`
- `Linux >= bdcd81707973cf8aa9305337166f8ee842a050d4 < cec0a487cf38ac1f9bca240ffe8a94c5014b72f2`
- `Linux >= bdcd81707973cf8aa9305337166f8ee842a050d4 < 44126b6994eeb28f2103b638e698f40a1244f327`
- `Linux 3.2`

## Remediation

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