---
id: CVE-2026-98343
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  dmaengine: fix use-after-free in dma_chan_put() and dma_release_channel()

  When dma_device_put() drops the last reference on chan->device->ref,
  dma_device_release() run…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  dmaengine: fix use-after-free in dma_chan_put() and dma_release_channel()

  When dma_device_put() drops the last reference on chan->device->ref,
  dma_device_release() run…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 8ad342a863590b24ce77681b7e081363fb3333f7 <
    b92c502595336a3cc5bb7a060170891366745a5d
  - >-
    Linux >= 8ad342a863590b24ce77681b7e081363fb3333f7 <
    855187a88bdf762c46b6849307597e3e02bfc1d9
  - >-
    Linux >= 8ad342a863590b24ce77681b7e081363fb3333f7 <
    c9780b601438137494b407eb4301bb3de2587ac9
  - >-
    Linux >= 8ad342a863590b24ce77681b7e081363fb3333f7 <
    07eb075b60d565a5e465a1945a80cc62807492ad
  - >-
    Linux >= 8ad342a863590b24ce77681b7e081363fb3333f7 <
    9319dd64d5cdef851841c091f30424faa2284c31
  - >-
    Linux >= 8ad342a863590b24ce77681b7e081363fb3333f7 <
    6cf31716b77a71c0d634106f4f3951377b8dc6dc
  - >-
    Linux >= 8ad342a863590b24ce77681b7e081363fb3333f7 <
    02bd02c585293634b213b142cba63cbf77891f6b
  - >-
    Linux >= 8ad342a863590b24ce77681b7e081363fb3333f7 <
    e873c74132f0c5f1452816cd9bb26208f0bba1e1
  - Linux 5.6
published: '2026-10-06'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T09:18:27.163'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98343'
references:
  - url: 'https://git.kernel.org/stable/c/02bd02c585293634b213b142cba63cbf77891f6b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/07eb075b60d565a5e465a1945a80cc62807492ad'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6cf31716b77a71c0d634106f4f3951377b8dc6dc'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/855187a88bdf762c46b6849307597e3e02bfc1d9'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9319dd64d5cdef851841c091f30424faa2284c31'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b92c502595336a3cc5bb7a060170891366745a5d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c9780b601438137494b407eb4301bb3de2587ac9'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e873c74132f0c5f1452816cd9bb26208f0bba1e1'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-06T08:50:17.400Z'
---

## Overview

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

dmaengine: fix use-after-free in dma_chan_put() and dma_release_channel()

When dma_device_put() drops the last reference on chan->device->ref,
dma_device_release() runs and may free the dma_device along with its
channels.

dma_chan_put() then still reads chan->device->owner via
dma_chan_to_owner() for the trailing module_put(). KASAN catches it:

	slab-use-after-free in dma_chan_put+0x3e6/0x4c0
	Read of size 8 by task insmod/6319
	Freed by task 6319:
	  kfree+0x225/0x470
	  dma_chan_put+0x395/0x4c0
	  dmaengine_put+0xf8/0x160

Cache the module owner in dma_chan_put() before the put so the trailing
module_put() does not need chan->device.

## Remediation

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