---
id: CVE-2026-80949
title: 'wifi: brcmfmac: Fix memory leak in brcmf_sdio_read_control()'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: brcmfmac: Fix memory leak in brcmf_sdio_read_control()

  The memory allocated for buf is not freed in some of the error paths in
  brcmf_sdio_read_control(). Fix tha…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe:
  - CWE-772
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= dd43a01c5cdb811adeb09e6a2d2788f8aa0d0969 <
    b1d0a90a844abccdfed9fe141b5d0d654a821485
  - >-
    Linux >= dd43a01c5cdb811adeb09e6a2d2788f8aa0d0969 <
    86b57fa3172e287bc083113507a965e6d9a46a45
  - >-
    Linux >= dd43a01c5cdb811adeb09e6a2d2788f8aa0d0969 <
    a732c4f36a4cd79f3702391f88ebb56f2e43b0ee
  - >-
    Linux >= dd43a01c5cdb811adeb09e6a2d2788f8aa0d0969 <
    7704f6ba2a8c492b07a3eaa1e311b4b30d389246
  - >-
    Linux >= dd43a01c5cdb811adeb09e6a2d2788f8aa0d0969 <
    fdb880a7d575efe8b5c7b5b819b96d9251a3937f
  - >-
    Linux >= dd43a01c5cdb811adeb09e6a2d2788f8aa0d0969 <
    261d7c7610b4b2f476382c88a2d1ae0cc5e07add
  - >-
    Linux >= dd43a01c5cdb811adeb09e6a2d2788f8aa0d0969 <
    ba04715ee672c336272be3ceb43bda9ffc33eb75
  - >-
    Linux >= dd43a01c5cdb811adeb09e6a2d2788f8aa0d0969 <
    0d10db8e94fcb23a799789aaa696b4d8f937e207
  - Linux 3.8
published: '2026-09-11'
updated: '2026-10-19'
sourceUpdated: '2026-10-19T08:45:33.207Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-80949'
references:
  - url: 'https://git.kernel.org/stable/c/b1d0a90a844abccdfed9fe141b5d0d654a821485'
  - url: 'https://git.kernel.org/stable/c/86b57fa3172e287bc083113507a965e6d9a46a45'
  - url: 'https://git.kernel.org/stable/c/a732c4f36a4cd79f3702391f88ebb56f2e43b0ee'
  - url: 'https://git.kernel.org/stable/c/7704f6ba2a8c492b07a3eaa1e311b4b30d389246'
  - url: 'https://git.kernel.org/stable/c/fdb880a7d575efe8b5c7b5b819b96d9251a3937f'
  - url: 'https://git.kernel.org/stable/c/261d7c7610b4b2f476382c88a2d1ae0cc5e07add'
  - url: 'https://git.kernel.org/stable/c/ba04715ee672c336272be3ceb43bda9ffc33eb75'
  - url: 'https://git.kernel.org/stable/c/0d10db8e94fcb23a799789aaa696b4d8f937e207'
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80949.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-80949'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532429'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-80949'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-80949'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80949.mbox
tags:
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00177
epssPercentile: 0.07171
ingestedAt: '2026-09-14T15:23:07.455Z'
---

## Overview

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

wifi: brcmfmac: Fix memory leak in brcmf_sdio_read_control()

The memory allocated for buf is not freed in some of the error paths in
brcmf_sdio_read_control(). Fix that by adding vfree() calls.

[arend: rework as suggested by Johannes]

## Affected

- `Linux >= dd43a01c5cdb811adeb09e6a2d2788f8aa0d0969 < b1d0a90a844abccdfed9fe141b5d0d654a821485`
- `Linux >= dd43a01c5cdb811adeb09e6a2d2788f8aa0d0969 < 86b57fa3172e287bc083113507a965e6d9a46a45`
- `Linux >= dd43a01c5cdb811adeb09e6a2d2788f8aa0d0969 < a732c4f36a4cd79f3702391f88ebb56f2e43b0ee`
- `Linux >= dd43a01c5cdb811adeb09e6a2d2788f8aa0d0969 < 7704f6ba2a8c492b07a3eaa1e311b4b30d389246`
- `Linux >= dd43a01c5cdb811adeb09e6a2d2788f8aa0d0969 < fdb880a7d575efe8b5c7b5b819b96d9251a3937f`
- `Linux >= dd43a01c5cdb811adeb09e6a2d2788f8aa0d0969 < 261d7c7610b4b2f476382c88a2d1ae0cc5e07add`
- `Linux >= dd43a01c5cdb811adeb09e6a2d2788f8aa0d0969 < ba04715ee672c336272be3ceb43bda9ffc33eb75`
- `Linux >= dd43a01c5cdb811adeb09e6a2d2788f8aa0d0969 < 0d10db8e94fcb23a799789aaa696b4d8f937e207`
- `Linux 3.8`

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, … · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80949.json)