---
id: CVE-2026-89532
title: 'kernel: svcrdma: Fix pcl_for_each_segment for empty chunks (CVE-2026-89532)'
summary: >-
  A flaw was found in the Linux kernel's svcrdma component. A remote attacker
  could send a specially crafted network packet that causes an integer underflow
  in the `pcl_for_each_segment` function when processing a chunk with zero
  segments. T…
severity: high
cvss: 7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: vendor
cwe: CWE-125
vendor: Red Hat
product: Red Hat Enterprise Linux 9
affected:
  - enterprise_linux 10
  - enterprise_linux 8
  - enterprise_linux 9
  - openshift_container_platform 4
published: '2026-09-11'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T10:08:02+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89532.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89532.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89532'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532488'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89532'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89532'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89532.mbox
  - url: 'https://git.kernel.org/stable/c/1e2e3481e39103a386b86be1c33eaef97cbdf16e'
  - url: 'https://git.kernel.org/stable/c/3a78b841879c2a3243f74edc514236fb2907167f'
  - url: 'https://git.kernel.org/stable/c/06d0390c37fa6714624af771bd72bbf1a7ed9bb1'
  - url: 'https://git.kernel.org/stable/c/9c5a03c3dc505c0295339b0a1b9e4fe36447e482'
  - url: 'https://git.kernel.org/stable/c/a1c954ca4977a4e6ec73ef92fe48073ec54f9fc8'
  - url: 'https://git.kernel.org/stable/c/6d33a7e6bf6c6b293a266a617201285a1ad32c56'
  - url: 'https://git.kernel.org/stable/c/b7713a784c59515d0aba558c8f5df6a0164dd3a9'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
  - score-dispute
epss: 0.00718
epssPercentile: 0.51788
scores:
  vendor: 7
  cna: 9.1
ingestedAt: '2026-09-14T15:23:07.452Z'
---

## Overview

A flaw was found in the Linux kernel's svcrdma component. A remote attacker could send a specially crafted network packet that causes an integer underflow in the `pcl_for_each_segment` function when processing a chunk with zero segments. This vulnerability leads to an out-of-bounds read, resulting in a general protection fault and a denial of service.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-09-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89532.json)

**kernel: svcrdma: Fix pcl_for_each_segment for empty chunks** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-16.

Affected:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

No fix planned:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

Not affected:

- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7

## Remediation

Affected