---
id: CVE-2026-31443
title: 'dmaengine: idxd: Fix crash when the event log is disabled'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  dmaengine: idxd: Fix crash when the event log is disabled

  If reporting errors to the event log is not supported by the hardware,
  and an error that causes Function Leve…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 6078a315aec15e0776fa90347cf4eba7478cdbd7 <
    aa0ffc6d3990ec35976308a068dc23178037e564
  - >-
    Linux >= 6078a315aec15e0776fa90347cf4eba7478cdbd7 <
    0e761079d653c25f838380cf7cef2730832110cc
  - >-
    Linux >= 6078a315aec15e0776fa90347cf4eba7478cdbd7 <
    52d2edea0d63c935e82631e4b9e4a94eccf97b5b
  - Linux 6.14
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-05T21:33:40.615820Z'
published: '2026-04-22'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T21:44:59.120Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-31443'
references:
  - url: 'https://git.kernel.org/stable/c/aa0ffc6d3990ec35976308a068dc23178037e564'
  - url: 'https://git.kernel.org/stable/c/0e761079d653c25f838380cf7cef2730832110cc'
  - url: 'https://git.kernel.org/stable/c/52d2edea0d63c935e82631e4b9e4a94eccf97b5b'
tags:
  - cve.org
epss: 0.00121
epssPercentile: 0.01899
ingestedAt: '2026-11-05T22:38:32.152Z'
---

## Overview

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

dmaengine: idxd: Fix crash when the event log is disabled

If reporting errors to the event log is not supported by the hardware,
and an error that causes Function Level Reset (FLR) is received, the
driver will try to restore the event log even if it was not allocated.

Also, only try to free the event log if it was properly allocated.

## Affected

- `Linux >= 6078a315aec15e0776fa90347cf4eba7478cdbd7 < aa0ffc6d3990ec35976308a068dc23178037e564`
- `Linux >= 6078a315aec15e0776fa90347cf4eba7478cdbd7 < 0e761079d653c25f838380cf7cef2730832110cc`
- `Linux >= 6078a315aec15e0776fa90347cf4eba7478cdbd7 < 52d2edea0d63c935e82631e4b9e4a94eccf97b5b`
- `Linux 6.14`

## Remediation

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