---
id: CVE-2026-31651
title: 'mmc: vub300: fix NULL-deref on disconnect'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  mmc: vub300: fix NULL-deref on disconnect

  Make sure to deregister the controller before dropping the reference to
  the driver data on disconnect to avoid NULL-pointer d…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 88095e7b473a3d9ec3b9c60429576e9cbd327c89 <
    6446516e626ce7c44bdadbcbb3d7677a2c52ce93
  - >-
    Linux >= 88095e7b473a3d9ec3b9c60429576e9cbd327c89 <
    ba3b9429de94958dc0060d9816a915dd75c34919
  - >-
    Linux >= 88095e7b473a3d9ec3b9c60429576e9cbd327c89 <
    517b58e1d067115f80d198feee10192da4c424d0
  - >-
    Linux >= 88095e7b473a3d9ec3b9c60429576e9cbd327c89 <
    6468cab1173f44f7a4b7a05ce8abfdfd1ce1557a
  - >-
    Linux >= 88095e7b473a3d9ec3b9c60429576e9cbd327c89 <
    53f2642d77ab5f1f303388bff5500363c6cf962c
  - >-
    Linux >= 88095e7b473a3d9ec3b9c60429576e9cbd327c89 <
    c83a282615d8f7ba28cebddd54600b419d562d82
  - >-
    Linux >= 88095e7b473a3d9ec3b9c60429576e9cbd327c89 <
    8d09e75759cb2afc0732acfb5a14a93c03805a61
  - >-
    Linux >= 88095e7b473a3d9ec3b9c60429576e9cbd327c89 <
    dff34ef879c5e73298443956a8b391311ba78d57
  - Linux 3.0
published: '2026-04-24'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T08:47:52.726Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-31651'
references:
  - url: 'https://git.kernel.org/stable/c/6446516e626ce7c44bdadbcbb3d7677a2c52ce93'
  - url: 'https://git.kernel.org/stable/c/ba3b9429de94958dc0060d9816a915dd75c34919'
  - url: 'https://git.kernel.org/stable/c/517b58e1d067115f80d198feee10192da4c424d0'
  - url: 'https://git.kernel.org/stable/c/6468cab1173f44f7a4b7a05ce8abfdfd1ce1557a'
  - url: 'https://git.kernel.org/stable/c/53f2642d77ab5f1f303388bff5500363c6cf962c'
  - url: 'https://git.kernel.org/stable/c/c83a282615d8f7ba28cebddd54600b419d562d82'
  - url: 'https://git.kernel.org/stable/c/8d09e75759cb2afc0732acfb5a14a93c03805a61'
  - url: 'https://git.kernel.org/stable/c/dff34ef879c5e73298443956a8b391311ba78d57'
tags:
  - cve.org
epss: 0.00166
epssPercentile: 0.05154
ingestedAt: '2026-09-08T15:33:26.990Z'
---

## Overview

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

mmc: vub300: fix NULL-deref on disconnect

Make sure to deregister the controller before dropping the reference to
the driver data on disconnect to avoid NULL-pointer dereferences or
use-after-free.

## Affected

- `Linux >= 88095e7b473a3d9ec3b9c60429576e9cbd327c89 < 6446516e626ce7c44bdadbcbb3d7677a2c52ce93`
- `Linux >= 88095e7b473a3d9ec3b9c60429576e9cbd327c89 < ba3b9429de94958dc0060d9816a915dd75c34919`
- `Linux >= 88095e7b473a3d9ec3b9c60429576e9cbd327c89 < 517b58e1d067115f80d198feee10192da4c424d0`
- `Linux >= 88095e7b473a3d9ec3b9c60429576e9cbd327c89 < 6468cab1173f44f7a4b7a05ce8abfdfd1ce1557a`
- `Linux >= 88095e7b473a3d9ec3b9c60429576e9cbd327c89 < 53f2642d77ab5f1f303388bff5500363c6cf962c`
- `Linux >= 88095e7b473a3d9ec3b9c60429576e9cbd327c89 < c83a282615d8f7ba28cebddd54600b419d562d82`
- `Linux >= 88095e7b473a3d9ec3b9c60429576e9cbd327c89 < 8d09e75759cb2afc0732acfb5a14a93c03805a61`
- `Linux >= 88095e7b473a3d9ec3b9c60429576e9cbd327c89 < dff34ef879c5e73298443956a8b391311ba78d57`
- `Linux 3.0`

## Remediation

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