---
id: CVE-2026-89486
title: >-
  kernel: ipmi: Fix use-after-free of cmd_rcvr in _ipmi_destroy_user()
  (CVE-2026-89486)
summary: >-
  A flaw was found in the Linux kernel's Intelligent Platform Management
  Interface (IPMI) subsystem. Due to incorrect synchronization during the
  deallocation of command receiver objects, a use-after-free vulnerability can
  occur. This allows …
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-825
vendor: Red Hat
product: Red Hat OpenShift Container Platform 4
affected:
  - openshift_container_platform 4
published: '2026-09-11'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T21:23:38+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89486.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89486.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89486'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532463'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89486'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89486'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89486.mbox
  - url: 'https://git.kernel.org/stable/c/05ec76cfbce653e07cec19b9b8b20e33449d5d87'
  - url: 'https://git.kernel.org/stable/c/3088e41292fecf132f85f79af5ee4d620b9ff1b4'
  - url: 'https://git.kernel.org/stable/c/5dc0b2a9af95a97861c1bffaf1687a3173e395c5'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
  - score-dispute
epss: 0.00124
epssPercentile: 0.02435
scores:
  vendor: 5.5
  cna: 7.8
ingestedAt: '2026-09-14T15:23:07.475Z'
---

## Overview

A flaw was found in the Linux kernel's Intelligent Platform Management Interface (IPMI) subsystem. Due to incorrect synchronization during the deallocation of command receiver objects, a use-after-free vulnerability can occur. This allows a freed memory region to be accessed, which could be exploited by a local attacker to cause system instability, a denial of service (DoS), or potentially achieve privilege escalation.

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-09-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89486.json)

**kernel: ipmi: Fix use-after-free of cmd_rcvr in _ipmi_destroy_user()** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-18.

Not 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

## Remediation

Refer to the advisory for fix availability.