---
id: CVE-2026-93154
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  RDMA/irdma: Add refcounting to user ring MRs

  Prevent userspace from deregistering the MRs that back QP/CQ/SRQ rings
  by bumping the MR's refcount upon association.
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  RDMA/irdma: Add refcounting to user ring MRs

  Prevent userspace from deregistering the MRs that back QP/CQ/SRQ rings
  by bumping the MR's refcount upon association.
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= b48c24c2d710cf34810c555dcef883a3d35a9c08 <
    07974c267f603a76aead348bca97deee95efdcc9
  - >-
    Linux >= b48c24c2d710cf34810c555dcef883a3d35a9c08 <
    a6c0e693a7c881bfa43ac74cbcad1f8e10f1382b
  - >-
    Linux >= b48c24c2d710cf34810c555dcef883a3d35a9c08 <
    f67d8a08f60c9217df6d40da56422d2049f5e334
  - Linux 5.14
published: '2026-09-17'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T18:18:23.060'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93154'
references:
  - url: 'https://git.kernel.org/stable/c/07974c267f603a76aead348bca97deee95efdcc9'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a6c0e693a7c881bfa43ac74cbcad1f8e10f1382b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f67d8a08f60c9217df6d40da56422d2049f5e334'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
epss: 0.00161
epssPercentile: 0.05756
ingestedAt: '2026-09-17T16:21:47.740Z'
---

## Overview

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

RDMA/irdma: Add refcounting to user ring MRs

Prevent userspace from deregistering the MRs that back QP/CQ/SRQ rings
by bumping the MR's refcount upon association.

## Remediation

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