---
id: CVE-2026-98018
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net: mctp: i3c: serialize probe with bus removal

  mctp_i3c_probe() drops busdevs_lock after finding the matching bus
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net: mctp: i3c: serialize probe with bus removal

  mctp_i3c_probe() drops busdevs_lock after finding the matching bus. A
  concurrent I3C_NOTIFY_BUS_REMOVE can then unregi…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= c8755b29b58ec65be17bcb8c40763d2dcb1f1db5 <
    e6541b2747682fdb2c6ded4a7cf7c39c4067a35c
  - >-
    Linux >= c8755b29b58ec65be17bcb8c40763d2dcb1f1db5 <
    765c5e357e67916a7aac8ead4ac2fa7d2bffe000
  - >-
    Linux >= c8755b29b58ec65be17bcb8c40763d2dcb1f1db5 <
    906d8dbafabfa81a30e3ade420cb9912f223a5e1
  - >-
    Linux >= c8755b29b58ec65be17bcb8c40763d2dcb1f1db5 <
    2b4707a149a55e8fa75c9ef32b359d60f470a566
  - Linux 6.7
published: '2026-09-25'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T11:17:30.257'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98018'
references:
  - url: 'https://git.kernel.org/stable/c/2b4707a149a55e8fa75c9ef32b359d60f470a566'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/765c5e357e67916a7aac8ead4ac2fa7d2bffe000'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/906d8dbafabfa81a30e3ade420cb9912f223a5e1'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e6541b2747682fdb2c6ded4a7cf7c39c4067a35c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-25T11:06:38.856Z'
---

## Overview

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

net: mctp: i3c: serialize probe with bus removal

mctp_i3c_probe() drops busdevs_lock after finding the matching bus. A
concurrent I3C_NOTIFY_BUS_REMOVE can then unregister and free the bus
netdev before probe passes its private data to mctp_i3c_add_device().
The latter consequently adds a list node through a freed mbus pointer.

Keep busdevs_lock held until the device has been added. This also
satisfies the __must_hold annotation on mctp_i3c_add_device().

## Remediation

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