---
id: CVE-2026-98833
title: 'kernel: mtd: core: call _get_device() with the master MTD (CVE-2026-98833)'
summary: >-
  A flaw was found in the Linux kernel's Memory Technology Device (MTD)
  subsystem. When accessing certain partitions, the kernel improperly passes a
  partition device reference instead of the master device structure to the
  driver callback. A …
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe: CWE-843
vendor: Red Hat
product: Red Hat Enterprise Linux 9
affected:
  - enterprise_linux 10
  - enterprise_linux 6
  - enterprise_linux 9
  - openshift_container_platform 4
published: '2026-10-18'
updated: '2026-10-23'
sourceUpdated: '2026-10-23T21:27:52+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98833.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98833.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-98833'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2555250'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-98833'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98833'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98833.mbox
  - url: 'https://git.kernel.org/stable/c/d94731cafa57e2c986ff391122d1494e5a3f3c3f'
  - url: 'https://git.kernel.org/stable/c/95c8f36293c22d450c371167ad4f9a5bbadc7539'
  - url: 'https://git.kernel.org/stable/c/f971f1c63cf71579258360a12bd185bc1cd1a043'
  - url: 'https://git.kernel.org/stable/c/dc482a281a19a7d7e91ad1b2d551bb301c54d0e6'
  - url: 'https://git.kernel.org/stable/c/12b31d1acd20b3185bb5f0748db0cf6874c8e9d1'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00168
epssPercentile: 0.05981
ingestedAt: '2026-10-18T16:47:32.470Z'
---

## Overview

A flaw was found in the Linux kernel's Memory Technology Device (MTD) subsystem. When accessing certain partitions, the kernel improperly passes a partition device reference instead of the master device structure to the driver callback. A local user could exploit this flaw during device access operations to cause invalid memory references, resulting in a system crash and Denial of Service (DoS).

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98833.json)

**kernel: mtd: core: call _get_device() with the master MTD** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-23.

Affected:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

No fix planned:

- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

Not affected:

- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat OpenShift Container Platform 4

## Remediation

Out of support scope