---
id: CVE-2026-68351
title: 'wifi: carl9170: bound memcpy length in cmd callback to prevent OOB read'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: carl9170: bound memcpy length in cmd callback to prevent OOB read

  When the firmware sends a command response with a length mismatch,
  carl9170_cmd_callback() logs…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= a84fab3cbfdc427e7d366f1cc844f27b2084c26c <
    38e240996a6a78c94ab07d461fd66e361d55c3c4
  - >-
    Linux >= a84fab3cbfdc427e7d366f1cc844f27b2084c26c <
    2d05c321d27624c413c950278d2dc8e0f44a8950
  - >-
    Linux >= a84fab3cbfdc427e7d366f1cc844f27b2084c26c <
    525036b20ef01d814a7fcd0567d123992e4479fa
  - >-
    Linux >= a84fab3cbfdc427e7d366f1cc844f27b2084c26c <
    f74e34e66379e487a09009a4f2d42470051672bd
  - >-
    Linux >= a84fab3cbfdc427e7d366f1cc844f27b2084c26c <
    500c36649f270de05a56591fcc1aaaa36687958e
  - >-
    Linux >= a84fab3cbfdc427e7d366f1cc844f27b2084c26c <
    9aee949c68dc6dccbc54333537b109c53fe2079f
  - >-
    Linux >= a84fab3cbfdc427e7d366f1cc844f27b2084c26c <
    cb7a38810cf25738176dac32dec7a146b3f959cf
  - >-
    Linux >= a84fab3cbfdc427e7d366f1cc844f27b2084c26c <
    4cde55b2feff9504d1f993ab80e84e7ccb62791c
  - Linux 2.6.37
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-06T16:47:50.502434Z'
published: '2026-08-10'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T16:55:14.043Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-68351'
references:
  - url: 'https://git.kernel.org/stable/c/38e240996a6a78c94ab07d461fd66e361d55c3c4'
  - url: 'https://git.kernel.org/stable/c/2d05c321d27624c413c950278d2dc8e0f44a8950'
  - url: 'https://git.kernel.org/stable/c/525036b20ef01d814a7fcd0567d123992e4479fa'
  - url: 'https://git.kernel.org/stable/c/f74e34e66379e487a09009a4f2d42470051672bd'
  - url: 'https://git.kernel.org/stable/c/500c36649f270de05a56591fcc1aaaa36687958e'
  - url: 'https://git.kernel.org/stable/c/9aee949c68dc6dccbc54333537b109c53fe2079f'
  - url: 'https://git.kernel.org/stable/c/cb7a38810cf25738176dac32dec7a146b3f959cf'
  - url: 'https://git.kernel.org/stable/c/4cde55b2feff9504d1f993ab80e84e7ccb62791c'
tags:
  - cve.org
epss: 0.0022
epssPercentile: 0.12607
ingestedAt: '2026-11-06T18:00:12.609Z'
---

## Overview

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

wifi: carl9170: bound memcpy length in cmd callback to prevent OOB read

When the firmware sends a command response with a length mismatch,
carl9170_cmd_callback() logs the mismatch and calls carl9170_restart()
but then falls through to memcpy(ar->readbuf, buffer + 4, len - 4).
Since len comes from the firmware and can exceed ar->readlen, this
copies more data than the readbuf was allocated for.

Bound the memcpy to min(len - 4, ar->readlen) so that the response
is still completed -- avoiding repeated restarts from queued garbage --
while preventing an overread past the response buffer.

## Affected

- `Linux >= a84fab3cbfdc427e7d366f1cc844f27b2084c26c < 38e240996a6a78c94ab07d461fd66e361d55c3c4`
- `Linux >= a84fab3cbfdc427e7d366f1cc844f27b2084c26c < 2d05c321d27624c413c950278d2dc8e0f44a8950`
- `Linux >= a84fab3cbfdc427e7d366f1cc844f27b2084c26c < 525036b20ef01d814a7fcd0567d123992e4479fa`
- `Linux >= a84fab3cbfdc427e7d366f1cc844f27b2084c26c < f74e34e66379e487a09009a4f2d42470051672bd`
- `Linux >= a84fab3cbfdc427e7d366f1cc844f27b2084c26c < 500c36649f270de05a56591fcc1aaaa36687958e`
- `Linux >= a84fab3cbfdc427e7d366f1cc844f27b2084c26c < 9aee949c68dc6dccbc54333537b109c53fe2079f`
- `Linux >= a84fab3cbfdc427e7d366f1cc844f27b2084c26c < cb7a38810cf25738176dac32dec7a146b3f959cf`
- `Linux >= a84fab3cbfdc427e7d366f1cc844f27b2084c26c < 4cde55b2feff9504d1f993ab80e84e7ccb62791c`
- `Linux 2.6.37`

## Remediation

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