---
id: CVE-2026-89531
title: 'svcrdma: Reject connection when transport allocation fails'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  svcrdma: Reject connection when transport allocation fails

  handle_connect_req() returns without action when
  svc_rdma_create_xprt() fails to allocate the new transport.…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe:
  - CWE-772
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 377f9b2f4529e0ac702fd7b91e216afd0adc959e <
    5bf47bbea3c22c0af2293b6c393ab04d5420f7ab
  - >-
    Linux >= 377f9b2f4529e0ac702fd7b91e216afd0adc959e <
    6e21754bbf75075f3fee1cebc79f3417364235ec
  - >-
    Linux >= 377f9b2f4529e0ac702fd7b91e216afd0adc959e <
    3cf372cec7ab2cd8c6002bf775cc14d90ccb098b
  - >-
    Linux >= 377f9b2f4529e0ac702fd7b91e216afd0adc959e <
    1f6a14c142fee4778c32709d1d54595c2e2b7991
  - >-
    Linux >= 377f9b2f4529e0ac702fd7b91e216afd0adc959e <
    0944462247dcb7de7622cdaaadf5f05c52707dab
  - Linux 2.6.25
published: '2026-09-11'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T12:47:43.672Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-89531'
references:
  - url: 'https://git.kernel.org/stable/c/5bf47bbea3c22c0af2293b6c393ab04d5420f7ab'
  - url: 'https://git.kernel.org/stable/c/6e21754bbf75075f3fee1cebc79f3417364235ec'
  - url: 'https://git.kernel.org/stable/c/3cf372cec7ab2cd8c6002bf775cc14d90ccb098b'
  - url: 'https://git.kernel.org/stable/c/1f6a14c142fee4778c32709d1d54595c2e2b7991'
  - url: 'https://git.kernel.org/stable/c/0944462247dcb7de7622cdaaadf5f05c52707dab'
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89531.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89531'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532393'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89531'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89531'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89531.mbox
tags:
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00168
epssPercentile: 0.06163
ingestedAt: '2026-09-14T11:11:19.886Z'
---

## Overview

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

svcrdma: Reject connection when transport allocation fails

handle_connect_req() returns without action when
svc_rdma_create_xprt() fails to allocate the new transport.
The CM core returns 0 for CONNECT_REQUEST events, so it does
not destroy the new rdma_cm_id. Each allocation failure under
memory pressure leaks one rdma_cm_id, and a remote peer driving
connection attempts can amplify this.

Reject the connection by returning a non-zero status from the
CM event handler, which tells the CM core to destroy the
orphaned cm_id.

## Affected

- `Linux >= 377f9b2f4529e0ac702fd7b91e216afd0adc959e < 5bf47bbea3c22c0af2293b6c393ab04d5420f7ab`
- `Linux >= 377f9b2f4529e0ac702fd7b91e216afd0adc959e < 6e21754bbf75075f3fee1cebc79f3417364235ec`
- `Linux >= 377f9b2f4529e0ac702fd7b91e216afd0adc959e < 3cf372cec7ab2cd8c6002bf775cc14d90ccb098b`
- `Linux >= 377f9b2f4529e0ac702fd7b91e216afd0adc959e < 1f6a14c142fee4778c32709d1d54595c2e2b7991`
- `Linux >= 377f9b2f4529e0ac702fd7b91e216afd0adc959e < 0944462247dcb7de7622cdaaadf5f05c52707dab`
- `Linux 2.6.25`

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, 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 7, Red Hat Enterprise Linux 8, … · updated 2026-10-05 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89531.json)