---
id: CVE-2026-93200
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  i3c: master: Fix use-after-free of master->this

  sysfs attribute callbacks for the master controller device dereference
  master->this
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  i3c: master: Fix use-after-free of master->this

  sysfs attribute callbacks for the master controller device dereference
  master->this.  However, master->this is freed in…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 <
    4f3145db05fede36b35f8249b8acde5bd5d54864
  - >-
    Linux >= 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 <
    50034d8d0f797c3a7a599f750a7d3e792e80dea5
  - >-
    Linux >= 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 <
    feb0ed76601f3c2f91f08688c5a7d8b9d382f720
  - Linux 5.0
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:18:16.297'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93200'
references:
  - url: 'https://git.kernel.org/stable/c/4f3145db05fede36b35f8249b8acde5bd5d54864'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/50034d8d0f797c3a7a599f750a7d3e792e80dea5'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/feb0ed76601f3c2f91f08688c5a7d8b9d382f720'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-17T16:21:47.721Z'
epss: 0.00206
epssPercentile: 0.09452
---

## Overview

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

i3c: master: Fix use-after-free of master->this

sysfs attribute callbacks for the master controller device dereference
master->this.  However, master->this is freed in
i3c_master_detach_free_devs() before the master device itself is
released.

As a result, sysfs accesses can dereference a freed master->this
pointer, leading to a use-after-free.

Keep master->this alive until i3c_masterdev_release(), which is called
after the master device and its sysfs state are being torn down. Do not
free master->this as part of the normal device detach path.

On the error path in i3c_master_set_info(), reset master->this and
bus.cur_master to NULL before freeing the allocated device.

## Remediation

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