---
id: CVE-2026-92506
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  firmware: arm_scmi: Fix requested device removal race

  scmi_protocol_device_unrequest() drops scmi_requested_devices_mtx while
  notifying listeners but continues to reta…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  firmware: arm_scmi: Fix requested device removal race

  scmi_protocol_device_unrequest() drops scmi_requested_devices_mtx while
  notifying listeners but continues to reta…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= d3cd7c525fd2ecce3a6c963f314969a54783d211 <
    2ff7713b7308cd6bea3328f7cd750b5eaab42af3
  - >-
    Linux >= d3cd7c525fd2ecce3a6c963f314969a54783d211 <
    1c35915eaaa81a12340c838c5c2ccb02be2194c3
  - >-
    Linux >= d3cd7c525fd2ecce3a6c963f314969a54783d211 <
    c3d4ef1c0ca6917aad6f1093b49f3932944a8c19
  - >-
    Linux >= d3cd7c525fd2ecce3a6c963f314969a54783d211 <
    21d35c5f46e99e9047bb9ded3ecb5ab440dd75b3
  - >-
    Linux >= d3cd7c525fd2ecce3a6c963f314969a54783d211 <
    2c4097e6c4aed276c5e9ec2ab331ab397ea780bf
  - Linux 6.3
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:17:53.187'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-92506'
references:
  - url: 'https://git.kernel.org/stable/c/1c35915eaaa81a12340c838c5c2ccb02be2194c3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/21d35c5f46e99e9047bb9ded3ecb5ab440dd75b3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/2c4097e6c4aed276c5e9ec2ab331ab397ea780bf'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/2ff7713b7308cd6bea3328f7cd750b5eaab42af3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c3d4ef1c0ca6917aad6f1093b49f3932944a8c19'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-17T16:21:47.781Z'
epss: 0.002
epssPercentile: 0.08757
---

## Overview

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

firmware: arm_scmi: Fix requested device removal race

scmi_protocol_device_unrequest() drops scmi_requested_devices_mtx while
notifying listeners but continues to retain the per-protocol list head.
When two SCMI drivers for the same protocol unregister concurrently, one
thread can remove the final request and free the list head while the other
is running its notifier. The latter then dereferences the freed list head
after reacquiring the mutex and can free it a second time.

Complete the list and IDR updates, including freeing an empty list head,
before dropping the mutex. Keep the blocking notifier outside the critical
section and retain only the detached request across the callback.

## Remediation

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