---
id: CVE-2026-80934
title: >-
  kernel: wifi: mt76: mt7996: fix TX DMA mapping leak for AddBA req frames
  (CVE-2026-80934)
summary: >-
  A flaw was found in the Linux kernel's mt76: mt7996 Wi-Fi driver. The driver
  incorrectly manages Direct Memory Access (DMA) mappings when processing AddBA
  request frames, causing a continuous leak of these mappings. Over time, this
  resourc…
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-771
vendor: Red Hat
product: Linux
affected:
  - >-
    Linux >= cb6ebbdffef2a888b95f121637cd1fad473919c6 <
    01f2e0da8548f82d704b65b513026cfedc5f8962
  - >-
    Linux >= cb6ebbdffef2a888b95f121637cd1fad473919c6 <
    b754d3a6d44c53d9853eba374d8a7ef279a9d00a
  - >-
    Linux >= cb6ebbdffef2a888b95f121637cd1fad473919c6 <
    deaa2e3656937fbbe312f0ee2616c756c6e2511f
  - Linux 91a5a48702e948e45df01a4f2fd54a0b0d0d6efb
  - Linux >= 6.17.8 < 6.18
  - Linux 6.18
published: '2026-09-11'
updated: '2026-09-14'
sourceUpdated: '2026-09-14T14:48:28+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80934.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80934.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-80934'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532169'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-80934'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-80934'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80934.mbox
  - url: 'https://git.kernel.org/stable/c/01f2e0da8548f82d704b65b513026cfedc5f8962'
  - url: 'https://git.kernel.org/stable/c/b754d3a6d44c53d9853eba374d8a7ef279a9d00a'
  - url: 'https://git.kernel.org/stable/c/deaa2e3656937fbbe312f0ee2616c756c6e2511f'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00166
epssPercentile: 0.06247
ingestedAt: '2026-09-14T00:35:28.532Z'
---

## Overview

A flaw was found in the Linux kernel's mt76: mt7996 Wi-Fi driver. The driver incorrectly manages Direct Memory Access (DMA) mappings when processing AddBA request frames, causing a continuous leak of these mappings. Over time, this resource exhaustion can lead to a Denial of Service (DoS) for the Wi-Fi functionality and other integrated components.

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80934.json)

**kernel: wifi: mt76: mt7996: fix TX DMA mapping leak for AddBA req frames** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-14.

Not affected:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

## Remediation

Refer to the advisory for fix availability.