---
id: CVE-2026-90308
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  RDMA/erdma: Hold QP references for AE and CM processing

  AE QP fatal events and iWARP CM paths load QPs from dev->qp_xa
  and then use or reference them outside the xarra…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  RDMA/erdma: Hold QP references for AE and CM processing

  AE QP fatal events and iWARP CM paths load QPs from dev->qp_xa
  and then use or reference them outside the xarra…
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 >= 155055771704f8cbb5c176a4309b7dc30a50450c <
    6e32f84b63c054e09392153125d7202abab2d14b
  - >-
    Linux >= 155055771704f8cbb5c176a4309b7dc30a50450c <
    ec987c0654651036dad6a42f7fa2a6d7c16a3687
  - >-
    Linux >= 155055771704f8cbb5c176a4309b7dc30a50450c <
    c92686867638cda954fdb2bdbac8a75e3aa6eaae
  - >-
    Linux >= 155055771704f8cbb5c176a4309b7dc30a50450c <
    a52eeff32024f190b3bdc99088c7becccd4fa60b
  - Linux 6.0
published: '2026-09-17'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T18:17:52.833'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90308'
references:
  - url: 'https://git.kernel.org/stable/c/6e32f84b63c054e09392153125d7202abab2d14b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a52eeff32024f190b3bdc99088c7becccd4fa60b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c92686867638cda954fdb2bdbac8a75e3aa6eaae'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ec987c0654651036dad6a42f7fa2a6d7c16a3687'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
epss: 0.00175
epssPercentile: 0.06158
ingestedAt: '2026-09-17T16:21:47.827Z'
---

## Overview

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

RDMA/erdma: Hold QP references for AE and CM processing

AE QP fatal events and iWARP CM paths load QPs from dev->qp_xa
and then use or reference them outside the xarray lock.
erdma_destroy_qp() can drop the destroy-path reference and free QP
resources while such a lookup is in flight.

Add erdma_qp_get_by_qpn() to acquire a kref under the xarray
lock with kref_get_unless_zero(). Remove the QP from the xarray
before dropping the destroy-path reference so no new lookup can acquire
it while destruction waits for existing users.

## Remediation

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