---
id: CVE-2026-80635
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: wcn36xx: fix OOB read from short trigger BA firmware response

  The firmware response length is only checked against sizeof(*rsp) (20
  bytes), but when candidate_cn…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: wcn36xx: fix OOB read from short trigger BA firmware response

  The firmware response length is only checked against sizeof(*rsp) (20
  bytes), but when candidate_cn…
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'
published: '2026-08-28'
updated: '2026-08-29'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-80635'
references:
  - url: 'https://git.kernel.org/stable/c/04aba50212f9f274e1a726fb3873b5ce8da2d821'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/af8f0ea1f0a3a5fb5ed2b8fed3f1501d644597ee'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b5e6f21923ca89d90256e7346301056f6502691e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c07aa0534d50361183833e3803204044cf1d0476'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d0b57bcd0dac6e2c9a3e474ec280e7db0b3edf35'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d0cafe6ed8d1f6d0097eda31d85f5760d4f359c2'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00403
epssPercentile: 0.31786
ingestedAt: '2026-08-30T03:46:31.093Z'
---

## Overview

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

wifi: wcn36xx: fix OOB read from short trigger BA firmware response

The firmware response length is only checked against sizeof(*rsp) (20
bytes), but when candidate_cnt >= 1, a 22-byte candidate struct is read
at buf + 20 without verifying the response contains it. This causes an
out-of-bounds read of stale heap data, corrupting the BA session state.

Add validation that the response includes the candidate data.

## Remediation

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