---
id: CVE-2026-68303
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  drm/vc4: hvs/v3d: Fix null dereference in unbind

  The hvs and v3d drivers use dev_get_drvdata(master) in their unbind
  functions
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  drm/vc4: hvs/v3d: Fix null dereference in unbind

  The hvs and v3d drivers use dev_get_drvdata(master) in their unbind
  functions. Since the vc4-drm gets removed before i…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= c8b75bca92cbf064b9fa125fc74a85994452e935 <
    8f62aae059e06746a18a00af27179c3c0f17f4c7
  - >-
    Linux >= c8b75bca92cbf064b9fa125fc74a85994452e935 <
    708688ec31ac6b35103ba364dc300a09930079d4
  - >-
    Linux >= c8b75bca92cbf064b9fa125fc74a85994452e935 <
    261f0a3f0ac03248284f5116d3258f89c9642215
  - >-
    Linux >= c8b75bca92cbf064b9fa125fc74a85994452e935 <
    7dc3680b7ffe01add3e9299fde8471d2dd53a8ae
  - Linux 4.4
published: '2026-08-10'
updated: '2026-09-21'
sourceUpdated: '2026-09-21T14:17:16.733'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-68303'
references:
  - url: 'https://git.kernel.org/stable/c/261f0a3f0ac03248284f5116d3258f89c9642215'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/708688ec31ac6b35103ba364dc300a09930079d4'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/7dc3680b7ffe01add3e9299fde8471d2dd53a8ae'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8f62aae059e06746a18a00af27179c3c0f17f4c7'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
epss: 0.00189
epssPercentile: 0.08787
ingestedAt: '2026-09-21T13:37:22.844Z'
---

## Overview

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

drm/vc4: hvs/v3d: Fix null dereference in unbind

The hvs and v3d drivers use dev_get_drvdata(master) in their unbind
functions. Since the vc4-drm gets removed before its dependent drivers
(vc4_hvs/vc4_v3d) the vc4_hvs_unbind/vc4_v3d_unbind functions try to
get drvdata of its master and fails with a null dereference error.

Use the data pointer passed to the unbind functions directly instead of
dev_get_drvdata(master). This avoids using potentially freed memory.

## Remediation

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