---
id: CVE-2025-68238
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  mtd: rawnand: cadence: fix DMA device NULL pointer dereference

  The DMA device pointer `dma_dev` was being dereferenced before ensuring
  that `cdns_ctrl->dmac` is proper…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  mtd: rawnand: cadence: fix DMA device NULL pointer dereference

  The DMA device pointer `dma_dev` was being dereferenced before ensuring
  that `cdns_ctrl->dmac` is proper…
severity: none
published: '2025-12-16'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T13:10:00.187'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-68238'
references:
  - url: 'https://git.kernel.org/stable/c/0c2a43cb43786011b48eeab6093db14888258c6b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/0c635241a62f2f5da1b48bfffae226d1f86a76ef'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/2178b0255eae108bb10e5e99658b28641bc06f43'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5c56bf214af85ca042bf97f8584aab2151035840'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9c58c64ec41290c12490ca7e1df45013fbbb41fd'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b146e0b085d9d6bfe838e0a15481cba7d093c67f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e282a4fdf3c6ee842a720010a8b5f7d77bedd126'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00191
epssPercentile: 0.08132
ingestedAt: '2026-10-14T13:30:58.463Z'
---

## Overview

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

mtd: rawnand: cadence: fix DMA device NULL pointer dereference

The DMA device pointer `dma_dev` was being dereferenced before ensuring
that `cdns_ctrl->dmac` is properly initialized.

Move the assignment of `dma_dev` after successfully acquiring the DMA
channel to ensure the pointer is valid before use.

## Remediation

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