---
id: CVE-2026-93109
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  RDMA/mlx5: Drain RCU callbacks during module teardown

  devx_free_subscription() can remain queued after the last DevX event file
  drops its module reference or an auxili…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  RDMA/mlx5: Drain RCU callbacks during module teardown

  devx_free_subscription() can remain queued after the last DevX event file
  drops its module reference or an auxili…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 6898d1c661d79f4707d8ba82991b2195822780ca <
    ca428e597f12b278bf158356e34641e6386cfa82
  - >-
    Linux >= 6898d1c661d79f4707d8ba82991b2195822780ca <
    59d60e04afd012f07e996d2e34cb90a4ec6f5cff
  - >-
    Linux >= 6898d1c661d79f4707d8ba82991b2195822780ca <
    2f946e7839f677fa14574b6babad14b37ae0bbbe
  - >-
    Linux >= 6898d1c661d79f4707d8ba82991b2195822780ca <
    4be7810ba70291abb2f68cc6db0ae1b93ee9c76a
  - >-
    Linux >= 6898d1c661d79f4707d8ba82991b2195822780ca <
    7babc25d8dd5b7642920fbc0737cfd1469e7025b
  - >-
    Linux >= 6898d1c661d79f4707d8ba82991b2195822780ca <
    4664368b9bd9d5d79ebad24056b98c34b9fed20f
  - >-
    Linux >= 6898d1c661d79f4707d8ba82991b2195822780ca <
    e37cdd75f8d61c1123d324ae5667ac3da562290e
  - Linux 5.6
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:18:05.327'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93109'
references:
  - url: 'https://git.kernel.org/stable/c/2f946e7839f677fa14574b6babad14b37ae0bbbe'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/4664368b9bd9d5d79ebad24056b98c34b9fed20f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/4be7810ba70291abb2f68cc6db0ae1b93ee9c76a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/59d60e04afd012f07e996d2e34cb90a4ec6f5cff'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/7babc25d8dd5b7642920fbc0737cfd1469e7025b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ca428e597f12b278bf158356e34641e6386cfa82'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e37cdd75f8d61c1123d324ae5667ac3da562290e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-17T16:21:47.754Z'
epss: 0.00206
epssPercentile: 0.09401
---

## Overview

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

RDMA/mlx5: Drain RCU callbacks during module teardown

devx_free_subscription() can remain queued after the last DevX event file
drops its module reference or an auxiliary driver detaches its devices.
mlx5_ib can then unload before the callback runs.

Registration error unwind has the same risk because driver registration
can attach existing devices before failing. Wait after all drivers have
stopped.

## Remediation

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