---
id: CVE-2026-89534
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  svcrdma: Clear sc_cm_id when ADDR_CHANGE replacement fails

  When svc_rdma_listen_handler() handles RDMA_CM_EVENT_ADDR_CHANGE,
  it creates a replacement listener cm_id an…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  svcrdma: Clear sc_cm_id when ADDR_CHANGE replacement fails

  When svc_rdma_listen_handler() handles RDMA_CM_EVENT_ADDR_CHANGE,
  it creates a replacement listener cm_id an…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-825
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= d1b586e75ec619dde1af47e21a41a6b1b51874c2 <
    65f0f82f20334e76acaf29087a59af7b3b9699ed
  - >-
    Linux >= d1b586e75ec619dde1af47e21a41a6b1b51874c2 <
    673e358ab7c11f8cec223c6a36a793056a67facd
  - >-
    Linux >= d1b586e75ec619dde1af47e21a41a6b1b51874c2 <
    01500306e1d50de7ca7a2cdcdfa28ac0523eb747
  - Linux 6.11
published: '2026-09-11'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T11:17:53.963'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89534'
references:
  - url: 'https://git.kernel.org/stable/c/01500306e1d50de7ca7a2cdcdfa28ac0523eb747'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/65f0f82f20334e76acaf29087a59af7b3b9699ed'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/673e358ab7c11f8cec223c6a36a793056a67facd'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89534.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89534'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532026'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89534'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89534'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89534.mbox
  - url: 'https://git.kernel.org/stable/c/2a68aeb2de8ad0fef9c50e73a50622a35c6af1a8'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00239
epssPercentile: 0.14839
scores:
  nvd: 8.8
  cna: 8.8
  vendor: 7
ingestedAt: '2026-09-14T15:23:07.475Z'
---

## Overview

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

svcrdma: Clear sc_cm_id when ADDR_CHANGE replacement fails

When svc_rdma_listen_handler() handles RDMA_CM_EVENT_ADDR_CHANGE,
it creates a replacement listener cm_id and returns 1, telling
the CM core to destroy the old one. If the replacement allocation
fails, sc_cm_id still points at the old cm_id that the CM core is
about to destroy. Any subsequent dereference of sc_cm_id --
such as svc_rdma_detach()'s rdma_disconnect() call -- is a
use-after-free.

NULL sc_cm_id on the failure path and guard svc_rdma_detach()'s
rdma_disconnect() call against NULL so that the listener can
be torn down safely when the server shuts down.

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89534.json)