---
id: CVE-2026-74340
title: 'wifi: wcn36xx: fix OOB read from firmware count in PRINT_REG_INFO indication'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: wcn36xx: fix OOB read from firmware count in PRINT_REG_INFO indication

  The firmware-controlled rsp->count field is used as the loop bound for
  indexing into the f…
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 >= 43efa3c0f241e04862be8e6a68ff765d36cde1ba <
    22b0b8572a64362531dd0ed499b75e16282aeb2b
  - >-
    Linux >= 43efa3c0f241e04862be8e6a68ff765d36cde1ba <
    3cf92b44c4fb88a5e8de8733a4494c0956606bca
  - >-
    Linux >= 43efa3c0f241e04862be8e6a68ff765d36cde1ba <
    0907c06dccae9e3c8d5a68eb9014beec73a36e79
  - >-
    Linux >= 43efa3c0f241e04862be8e6a68ff765d36cde1ba <
    64228dfc4247aca178c01e5a37af7d8dcc7a6089
  - >-
    Linux >= 43efa3c0f241e04862be8e6a68ff765d36cde1ba <
    23d210877968657bd07e1a517e0b516db20a1d80
  - >-
    Linux >= 43efa3c0f241e04862be8e6a68ff765d36cde1ba <
    f03782f7f41f2afee5076a1ef08ced5649218771
  - >-
    Linux >= 43efa3c0f241e04862be8e6a68ff765d36cde1ba <
    f987efff29a5fe45320ea5991c9d5cb98b676953
  - >-
    Linux >= 43efa3c0f241e04862be8e6a68ff765d36cde1ba <
    df2187acfca6c6cca372c5d35f42394d9c270b09
  - Linux 4.11
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-16T18:53:57.508619Z'
published: '2026-08-15'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T18:55:34.097Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-74340'
references:
  - url: 'https://git.kernel.org/stable/c/22b0b8572a64362531dd0ed499b75e16282aeb2b'
  - url: 'https://git.kernel.org/stable/c/3cf92b44c4fb88a5e8de8733a4494c0956606bca'
  - url: 'https://git.kernel.org/stable/c/0907c06dccae9e3c8d5a68eb9014beec73a36e79'
  - url: 'https://git.kernel.org/stable/c/64228dfc4247aca178c01e5a37af7d8dcc7a6089'
  - url: 'https://git.kernel.org/stable/c/23d210877968657bd07e1a517e0b516db20a1d80'
  - url: 'https://git.kernel.org/stable/c/f03782f7f41f2afee5076a1ef08ced5649218771'
  - url: 'https://git.kernel.org/stable/c/f987efff29a5fe45320ea5991c9d5cb98b676953'
  - url: 'https://git.kernel.org/stable/c/df2187acfca6c6cca372c5d35f42394d9c270b09'
tags:
  - cve.org
epss: 0.00419
epssPercentile: 0.34713
ingestedAt: '2026-10-16T19:46:24.377Z'
---

## Overview

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

wifi: wcn36xx: fix OOB read from firmware count in PRINT_REG_INFO indication

The firmware-controlled rsp->count field is used as the loop bound for
indexing into the flexible rsp->regs[] array without validation against
the message length. A count exceeding the actual data causes out-of-
bounds reads from the heap-allocated message buffer.

Add a check that count fits within the received message.

## Affected

- `Linux >= 43efa3c0f241e04862be8e6a68ff765d36cde1ba < 22b0b8572a64362531dd0ed499b75e16282aeb2b`
- `Linux >= 43efa3c0f241e04862be8e6a68ff765d36cde1ba < 3cf92b44c4fb88a5e8de8733a4494c0956606bca`
- `Linux >= 43efa3c0f241e04862be8e6a68ff765d36cde1ba < 0907c06dccae9e3c8d5a68eb9014beec73a36e79`
- `Linux >= 43efa3c0f241e04862be8e6a68ff765d36cde1ba < 64228dfc4247aca178c01e5a37af7d8dcc7a6089`
- `Linux >= 43efa3c0f241e04862be8e6a68ff765d36cde1ba < 23d210877968657bd07e1a517e0b516db20a1d80`
- `Linux >= 43efa3c0f241e04862be8e6a68ff765d36cde1ba < f03782f7f41f2afee5076a1ef08ced5649218771`
- `Linux >= 43efa3c0f241e04862be8e6a68ff765d36cde1ba < f987efff29a5fe45320ea5991c9d5cb98b676953`
- `Linux >= 43efa3c0f241e04862be8e6a68ff765d36cde1ba < df2187acfca6c6cca372c5d35f42394d9c270b09`
- `Linux 4.11`

## Remediation

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