---
id: CVE-2026-93092
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  firmware: arm_scmi: Unregister device notifier before IDR teardown

  The requested-devices notifier looks up protocol fwnodes from the
  active_protocols IDR
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  firmware: arm_scmi: Unregister device notifier before IDR teardown

  The requested-devices notifier looks up protocol fwnodes from the
  active_protocols IDR. During remov…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 53b8c25df7082edd78a3fc63e359abee0f28fa70 <
    70a26b37389846f1f29a09f7983aa3f45feff529
  - >-
    Linux >= 53b8c25df7082edd78a3fc63e359abee0f28fa70 <
    492fb49eac24beecd6d3c5e4744a513e626f8dcf
  - >-
    Linux >= 53b8c25df7082edd78a3fc63e359abee0f28fa70 <
    f5e528f631425416f9b39e9d8b385c9f1ceb40d6
  - >-
    Linux >= 53b8c25df7082edd78a3fc63e359abee0f28fa70 <
    74fcaa0a3f7ad3edfde2e8c6cb8ae457a00e0b7a
  - >-
    Linux >= 53b8c25df7082edd78a3fc63e359abee0f28fa70 <
    66a0bbf30cc14140fe13f63cd594a7c1ee352b75
  - Linux 6.3
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:18:03.177'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93092'
references:
  - url: 'https://git.kernel.org/stable/c/492fb49eac24beecd6d3c5e4744a513e626f8dcf'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/66a0bbf30cc14140fe13f63cd594a7c1ee352b75'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/70a26b37389846f1f29a09f7983aa3f45feff529'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/74fcaa0a3f7ad3edfde2e8c6cb8ae457a00e0b7a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f5e528f631425416f9b39e9d8b385c9f1ceb40d6'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-17T16:21:47.759Z'
epss: 0.00168
epssPercentile: 0.06492
---

## Overview

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

firmware: arm_scmi: Unregister device notifier before IDR teardown

The requested-devices notifier looks up protocol fwnodes from the
active_protocols IDR. During remove, unregister the notifier before
releasing and destroying active_protocols so no notifier callback can race
with the IDR teardown.

Keep the bus notifier registered until after the protocol state is torn
down, matching the existing remove ordering for SCMI bus users.

## Remediation

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