---
id: CVE-2026-89993
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  dmaengine: dw-edma: Initialize IRQ data before requesting IRQs

  dw_edma_irq_request() passes struct dw_edma_irq to request_irq() before
  dw_edma_channel_setup() fills th…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  dmaengine: dw-edma: Initialize IRQ data before requesting IRQs

  dw_edma_irq_request() passes struct dw_edma_irq to request_irq() before
  dw_edma_channel_setup() fills th…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf <
    b86280b12ccf33b68b309b7cb0e4476894dfe77c
  - >-
    Linux >= e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf <
    07e50cef557def076418c67051a336e4c6bd50e1
  - >-
    Linux >= e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf <
    17ef63843c0fcbf1efdfbbfb0f5584a5ea2c91ba
  - >-
    Linux >= e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf <
    d232bc6cf4562132ef50644484dfd4b23a593295
  - >-
    Linux >= e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf <
    fac202d73e7a649b7d4010325c6c6dcd9334fe65
  - >-
    Linux >= e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf <
    d91fb6c0d10dad32929dc5c6850f89df34e1bfcd
  - >-
    Linux >= e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf <
    647217abea849d3d45f8cb0b8ee5b78d50f26985
  - Linux 5.3
published: '2026-09-16'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T11:17:10.470'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89993'
references:
  - url: 'https://git.kernel.org/stable/c/07e50cef557def076418c67051a336e4c6bd50e1'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/17ef63843c0fcbf1efdfbbfb0f5584a5ea2c91ba'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/647217abea849d3d45f8cb0b8ee5b78d50f26985'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b86280b12ccf33b68b309b7cb0e4476894dfe77c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d232bc6cf4562132ef50644484dfd4b23a593295'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d91fb6c0d10dad32929dc5c6850f89df34e1bfcd'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/fac202d73e7a649b7d4010325c6c6dcd9334fe65'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-16T10:53:53.947Z'
epss: 0.00206
epssPercentile: 0.10948
---

## Overview

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

dmaengine: dw-edma: Initialize IRQ data before requesting IRQs

dw_edma_irq_request() passes struct dw_edma_irq to request_irq() before
dw_edma_channel_setup() fills the back pointer. A shared interrupt can
therefore enter the handler with dw_irq->dw still NULL, leading to a
NULL pointer dereference.

Set the back pointer before installing each handler.

## Remediation

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