---
id: CVE-2026-98574
title: >-
  kernel: net: bcmgenet: stop Tx NAPI before disabling the queues
  (CVE-2026-98574)
summary: >-
  A flaw was found in the Linux kernel's Broadcom GENET network driver. Improper
  synchronization between disabling transmission queues and stopping completion
  polling during interface shutdown or suspend operations can prematurely
  re-enable …
severity: medium
cvss: 4.1
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe: CWE-825
vendor: Red Hat
product: Linux
affected:
  - >-
    Linux >= 254f3239dd070e469f45c3ca8b6ac38e47d6c730 <
    63bcc2fee6419963e45e7c2cd698fa862409601d
  - >-
    Linux >= 254f3239dd070e469f45c3ca8b6ac38e47d6c730 <
    f329d42423089904758f2685cda295de9bf99441
  - >-
    Linux >= 254f3239dd070e469f45c3ca8b6ac38e47d6c730 <
    7e87508b5c4d81210d0a736ed01962e52f5c4c56
  - Linux 6.15
published: '2026-10-18'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T03:34:49+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98574.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98574.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-98574'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2555034'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-98574'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98574'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98574.mbox
  - url: 'https://git.kernel.org/stable/c/63bcc2fee6419963e45e7c2cd698fa862409601d'
  - url: 'https://git.kernel.org/stable/c/f329d42423089904758f2685cda295de9bf99441'
  - url: 'https://git.kernel.org/stable/c/7e87508b5c4d81210d0a736ed01962e52f5c4c56'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00198
epssPercentile: 0.09495
ingestedAt: '2026-10-18T15:45:12.256Z'
---

## Overview

A flaw was found in the Linux kernel's Broadcom GENET network driver. Improper synchronization between disabling transmission queues and stopping completion polling during interface shutdown or suspend operations can prematurely re-enable a queue. This race condition allows packet transmission to access freed memory buffers, causing a use-after-free condition. A local user could exploit this issue during device reconfiguration to trigger memory corruption, leading to a Denial of Service (DoS) via a system crash.

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-10-20 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98574.json)

**kernel: net: bcmgenet: stop Tx NAPI before disabling the queues** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-20.

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.