---
id: CVE-2026-89452
title: 'kernel: iommu/msm: Unwind probe state on registration failure (CVE-2026-89452)'
summary: >-
  A flaw was found in the `iommu/msm` component of the Linux kernel. This
  vulnerability occurs when `msm_iommu_probe()` fails to properly unwind its
  probe state during registration, leaving a dangling list entry. A local
  attacker could poten…
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: '2026-09-15'
sourceUpdated: '2026-09-15T12:24:04+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89452.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89452.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89452'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532496'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89452'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89452'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89452.mbox
  - url: 'https://git.kernel.org/stable/c/535a200220ca2c83bc8bf54bd2cbe045d6ee70c4'
  - url: 'https://git.kernel.org/stable/c/7f7074a886c4a93e3d12076ce60a510a1ebe400c'
  - url: 'https://git.kernel.org/stable/c/f532401be9312ecd166f616bb74a65b0b4c150fa'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
  - score-dispute
epss: 0.0018
epssPercentile: 0.07881
scores:
  vendor: 4.4
  cna: 8.4
ingestedAt: '2026-09-14T15:23:07.475Z'
---

## Overview

A flaw was found in the `iommu/msm` component of the Linux kernel. This vulnerability occurs when `msm_iommu_probe()` fails to properly unwind its probe state during registration, leaving a dangling list entry. A local attacker could potentially exploit this to cause a dereference of the dangling list entry, leading to system instability or a denial of service.

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89452.json)

**kernel: iommu/msm: Unwind probe state on registration failure** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-15.

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.