---
id: CVE-2026-98305
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net: dsa: mxl862xx: disable the stats poll on teardown

  mxl862xx_setup() arms the stats poll before mxl862xx_setup_mdio(), and
  nothing stops it until dsa_register_switc…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net: dsa: mxl862xx: disable the stats poll on teardown

  mxl862xx_setup() arms the stats poll before mxl862xx_setup_mdio(), and
  nothing stops it until dsa_register_switc…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= a21d33a5265f0b31d935a8b9b2b6faefb5185911 <
    97df811a11d4f76bc2ffe67b6bf730263f56c668
  - >-
    Linux >= a21d33a5265f0b31d935a8b9b2b6faefb5185911 <
    9e92ad4630f5dd1838ce6bbe6b1bd2c73d34de36
  - Linux 7.1
published: '2026-10-06'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T09:18:21.660'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98305'
references:
  - url: 'https://git.kernel.org/stable/c/97df811a11d4f76bc2ffe67b6bf730263f56c668'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9e92ad4630f5dd1838ce6bbe6b1bd2c73d34de36'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-06T08:50:17.412Z'
---

## Overview

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

net: dsa: mxl862xx: disable the stats poll on teardown

mxl862xx_setup() arms the stats poll before mxl862xx_setup_mdio(), and
nothing stops it until dsa_register_switch() has returned an error to
mxl862xx_probe(). DSA frees the dsa_port list before it returns, so a
poll that fires once .setup or a later step of dsa_tree_setup() has
failed walks freed ports. On shutdown the user ports stay registered,
and the WORK_STOPPED flag test in mxl862xx_get_stats64() is not atomic
with the cancel in mxl862xx_shutdown(), so a re-arm that read the flag
before it was set queues the poll after cancel_delayed_work_sync() has
returned.

Arm the poll once .setup has succeeded and stop it from a .teardown op,
which DSA calls on unregister and after a failed registration, in both
cases before it frees the ports. Use disable_delayed_work_sync() there
and in shutdown(): it drains a running poll as the cancel did and turns
every later attempt to queue the work into a no-op, so the re-arm
cannot bring the poll back. remove() and the probe error path only set
WORK_STOPPED, which crc_err_work tests before it walks the ports.

## Remediation

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