---
id: CVE-2026-53117
title: 's390/cio: use generic driver_override infrastructure'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  s390/cio: use generic driver_override infrastructure

  When a driver is probed through __driver_attach(), the bus' match()
  callback is called without the device lock hel…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= ebc3d179150347f3b6d97d8f249378bb2218f95e <
    c4295487124f461405e1ef64dfa8c4ab0cb7ebcf
  - >-
    Linux >= ebc3d179150347f3b6d97d8f249378bb2218f95e <
    106d594711e97762788046c5bbb94f580abc4bf4
  - >-
    Linux >= ebc3d179150347f3b6d97d8f249378bb2218f95e <
    2081957d8c323ffb58a10bc64837717ac5a042a1
  - >-
    Linux >= ebc3d179150347f3b6d97d8f249378bb2218f95e <
    b660ba045b2b22cf3b4be72773de00cb48f47be5
  - >-
    Linux >= ebc3d179150347f3b6d97d8f249378bb2218f95e <
    ac4d8bb6e2e13e8684a76ea48d13ebaaaf5c24c4
  - Linux 5.3
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-06T16:19:31.691577Z'
published: '2026-06-24'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T16:24:01.750Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-53117'
references:
  - url: 'https://git.kernel.org/stable/c/c4295487124f461405e1ef64dfa8c4ab0cb7ebcf'
  - url: 'https://git.kernel.org/stable/c/106d594711e97762788046c5bbb94f580abc4bf4'
  - url: 'https://git.kernel.org/stable/c/2081957d8c323ffb58a10bc64837717ac5a042a1'
  - url: 'https://git.kernel.org/stable/c/b660ba045b2b22cf3b4be72773de00cb48f47be5'
  - url: 'https://git.kernel.org/stable/c/ac4d8bb6e2e13e8684a76ea48d13ebaaaf5c24c4'
tags:
  - cve.org
epss: 0.00175
epssPercentile: 0.07045
ingestedAt: '2026-11-06T16:57:43.289Z'
---

## Overview

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

s390/cio: use generic driver_override infrastructure

When a driver is probed through __driver_attach(), the bus' match()
callback is called without the device lock held, thus accessing the
driver_override field without a lock, which can cause a UAF.

Fix this by using the driver-core driver_override infrastructure taking
care of proper locking internally.

Note that calling match() from __driver_attach() without the device lock
held is intentional. [1]

## Affected

- `Linux >= ebc3d179150347f3b6d97d8f249378bb2218f95e < c4295487124f461405e1ef64dfa8c4ab0cb7ebcf`
- `Linux >= ebc3d179150347f3b6d97d8f249378bb2218f95e < 106d594711e97762788046c5bbb94f580abc4bf4`
- `Linux >= ebc3d179150347f3b6d97d8f249378bb2218f95e < 2081957d8c323ffb58a10bc64837717ac5a042a1`
- `Linux >= ebc3d179150347f3b6d97d8f249378bb2218f95e < b660ba045b2b22cf3b4be72773de00cb48f47be5`
- `Linux >= ebc3d179150347f3b6d97d8f249378bb2218f95e < ac4d8bb6e2e13e8684a76ea48d13ebaaaf5c24c4`
- `Linux 5.3`

## Remediation

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