---
id: CVE-2026-80949
title: >-
  kernel: wifi: brcmfmac: Fix memory leak in brcmf_sdio_read_control()
  (CVE-2026-80949)
summary: >-
  A flaw was found in the Linux kernel's brcmfmac Wi-Fi driver. The memory
  allocated for a buffer is not properly released in certain error handling
  paths within the `brcmf_sdio_read_control()` function. This improper memory
  management can l…
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: Red Hat
product: Red Hat Enterprise Linux 9
affected:
  - enterprise_linux 10
  - enterprise_linux 7
  - enterprise_linux 8
  - enterprise_linux 9
  - openshift_container_platform 4
published: '2026-09-11'
updated: '2026-09-14'
sourceUpdated: '2026-09-14T17:01:50+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80949.json'
references:
  - 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
  - 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'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00176
epssPercentile: 0.07429
ingestedAt: '2026-09-14T15:23:07.455Z'
---

## Overview

A flaw was found in the Linux kernel's brcmfmac Wi-Fi driver. The memory allocated for a buffer is not properly released in certain error handling paths within the `brcmf_sdio_read_control()` function. This improper memory management can lead to a memory leak, potentially causing system instability or a denial of service (DoS) due to resource exhaustion.

## 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)

**kernel: wifi: brcmfmac: Fix memory leak in brcmf_sdio_read_control()** — rated Low by Red Hat. Released 2026-09-11, updated 2026-09-14.

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
- Red Hat OpenShift Container Platform 4

Not affected:

- Red Hat Enterprise Linux 6

## Remediation

Fix deferred