---
id: CVE-2026-89547
title: 'kernel: SUNRPC: Check svc pool percpu counter allocation (CVE-2026-89547)'
summary: >-
  A flaw was found in the Linux kernel's SUNRPC component. A local
  administrator, under specific conditions of memory pressure or fault injection
  during RPC server startup, can trigger a failure in per-CPU counter
  allocation. This failure le…
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-476
vendor: Red Hat
product: Red Hat Enterprise Linux 9
affected:
  - enterprise_linux 10
  - enterprise_linux 6
  - enterprise_linux 9
  - openshift_container_platform 4
published: '2026-09-11'
updated: '2026-09-14'
sourceUpdated: '2026-09-14T15:20:44+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89547.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89547.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89547'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532039'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89547'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89547'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89547.mbox
  - url: 'https://git.kernel.org/stable/c/57ac7d899409b0a9b768cf417e3bb86bcca3d4c6'
  - url: 'https://git.kernel.org/stable/c/3a2b7649de76376a69f1d3ed2a539fb15907cd4d'
  - url: 'https://git.kernel.org/stable/c/bd1ef2cfb44d72b7aa6943e87b206eb0e30fbd0c'
  - url: 'https://git.kernel.org/stable/c/b541a15046976e481618726cc23db0fb22d576db'
  - url: 'https://git.kernel.org/stable/c/43e11e164704dde975c9edb370de1a06bec67270'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00568
epssPercentile: 0.44732
scores:
  vendor: 7
  cna: 8.1
ingestedAt: '2026-09-14T15:23:07.452Z'
---

## Overview

A flaw was found in the Linux kernel's SUNRPC component. A local administrator, under specific conditions of memory pressure or fault injection during RPC server startup, can trigger a failure in per-CPU counter allocation. This failure leads to uninitialized counters, which, when subsequently accessed, can silently corrupt data in the current CPU's per-CPU area. This corruption could lead to system instability or a denial of service.

## 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-2026-89547.json)

**kernel: SUNRPC: Check svc pool percpu counter allocation** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-14.

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

Not affected:

- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat OpenShift Container Platform 4

## Remediation

Out of support scope