---
id: CVE-2026-98359
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  RDMA/core: Reject unregistering netdevs in ib_get_eth_speed

  ib_device_get_netdev() intentionally returns a referenced net_device even
  when it is unregistering, so matc…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  RDMA/core: Reject unregistering netdevs in ib_get_eth_speed

  ib_device_get_netdev() intentionally returns a referenced net_device even
  when it is unregistering, so matc…
severity: high
cvss: 7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= d41861942fc55c14b6280d9568a0d0112037f065 <
    be4b44c8b47c67a04c08b1a0aba18006b749ae6a
  - >-
    Linux >= d41861942fc55c14b6280d9568a0d0112037f065 <
    45c60ffc79771bad154f224a05753191cf1b37bc
  - >-
    Linux >= d41861942fc55c14b6280d9568a0d0112037f065 <
    520cd057f138ed8dbe8e05f0eae3a8ed4c5d3a5e
  - >-
    Linux >= d41861942fc55c14b6280d9568a0d0112037f065 <
    a219459fbd1b2598e63c81a52847eba6c28b72d2
  - >-
    Linux >= d41861942fc55c14b6280d9568a0d0112037f065 <
    5bd42f74ec3b4f4687fb600f367af0828d513b3c
  - >-
    Linux >= d41861942fc55c14b6280d9568a0d0112037f065 <
    ef9fbe1b93f3b617b96e86d5cd76b3fa44514cb5
  - Linux 4.14
published: '2026-10-06'
updated: '2026-10-07'
sourceUpdated: '2026-10-07T07:17:10.300'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98359'
references:
  - url: 'https://git.kernel.org/stable/c/45c60ffc79771bad154f224a05753191cf1b37bc'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/520cd057f138ed8dbe8e05f0eae3a8ed4c5d3a5e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5bd42f74ec3b4f4687fb600f367af0828d513b3c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a219459fbd1b2598e63c81a52847eba6c28b72d2'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/be4b44c8b47c67a04c08b1a0aba18006b749ae6a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ef9fbe1b93f3b617b96e86d5cd76b3fa44514cb5'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98359.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-98359'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2546470'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-98359'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98359'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98359.mbox
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00116
epssPercentile: 0.01593
ingestedAt: '2026-10-06T08:50:17.393Z'
cwe:
  - CWE-366
scores:
  nvd: 7
  vendor: 5.5
  cna: 7
---

## Overview

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

RDMA/core: Reject unregistering netdevs in ib_get_eth_speed

ib_device_get_netdev() intentionally returns a referenced net_device even
when it is unregistering, so matching and cleanup callers can still find
the association. The reference keeps struct net_device allocated, but does
not guarantee that the device remains operational.

ib_get_eth_speed() uses the returned device operationally by invoking its
ethtool callback. Although that call is made under RTNL, the function does
not verify the registration state first. An asynchronous RDMA port query
can therefore call into a netdev after NETDEV_UNREGISTER and ndo_uninit
have completed.

Check for NETREG_REGISTERED while holding RTNL and return -ENODEV for a
device which is being unregistered. Keeping RTNL across the check and the
ethtool operation prevents unregister from starting between them.

Keep the speed fallback and warning under RTNL as well, so the warning can
safely read netdev->name. Drop the netdev reference before releasing RTNL
once all accesses to the device are complete.

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Moderate · 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 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-10-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98359.json)