---
id: CVE-2026-89539
title: >-
  kernel: Linux kernel: SUNRPC memory leak due to duplicate CREDS_VALUE options
  (CVE-2026-89539)
summary: >-
  A flaw was found in the SUNRPC subsystem of the Linux kernel. The
  `gssx_dec_option_array()` function, responsible for decoding options, does not
  correctly handle replies containing duplicate `CREDS_VALUE` entries. This
  oversight causes the…
severity: medium
cvss: 5.9
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe: CWE-772
vendor: Red Hat
product: Red Hat OpenShift Container Platform 4
affected:
  - openshift_container_platform 4
published: '2026-09-11'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T14:56:02+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89539.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89539.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89539'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532304'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89539'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89539'
  - url: 'https://git.kernel.org/stable/c/2e4ce62385c1b8a887c5370af058ac7b52a8eaf9'
  - url: 'https://git.kernel.org/stable/c/7a1d0501cbb962beba23377035d667bf3c1726ee'
  - url: 'https://git.kernel.org/stable/c/9d94f046b23de0f77849ea69133063c949297e30'
  - url: 'https://git.kernel.org/stable/c/f615b884310bf82d0014e3b5a92eb9aa88146685'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00209
epssPercentile: 0.09808
ingestedAt: '2026-09-14T11:11:19.886Z'
---

## Overview

A flaw was found in the SUNRPC subsystem of the Linux kernel. The `gssx_dec_option_array()` function, responsible for decoding options, does not correctly handle replies containing duplicate `CREDS_VALUE` entries. This oversight causes the system to allocate memory for credentials multiple times without releasing previous allocations, leading to a memory leak. A remote attacker could exploit this to consume system resources.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat OpenShift Container Platform 4 · updated 2026-09-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89539.json)

**kernel: Linux kernel: SUNRPC memory leak due to duplicate CREDS_VALUE options** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-16.

Affected:

- Red Hat OpenShift Container Platform 4

No fix planned:

- Red Hat OpenShift Container Platform 4

## Remediation

Fix deferred