---
id: CVE-2026-89445
title: 'kernel: iommufd: Fix UAF in selftest IOPF reporting (CVE-2026-89445)'
summary: >-
  A flaw was found in the Linux kernel's iommufd selftest component. This
  Use-After-Free (UAF) vulnerability occurs when the TRIGGER_IOPF function
  borrows an attach handle without proper synchronization during a PASID detach
  operation. A con…
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-825
vendor: Red Hat
product: Red Hat Enterprise Linux 9
affected:
  - enterprise_linux 10
  - enterprise_linux 9
  - openshift_container_platform 4
published: '2026-09-11'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T19:49:16+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89445.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89445.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89445'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532116'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89445'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89445'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89445.mbox
  - url: 'https://git.kernel.org/stable/c/8c07df7cdfcf52f1ff276c588612aabc6c6b8399'
  - url: 'https://git.kernel.org/stable/c/cab2895729516799384d48560e6fca105fb3f927'
  - url: 'https://git.kernel.org/stable/c/e27e90bde68b2ab92e63ed19caad1ef57188bea0'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00161
epssPercentile: 0.05769
scores:
  vendor: 7
  cna: 8.8
ingestedAt: '2026-09-14T15:23:07.475Z'
---

## Overview

A flaw was found in the Linux kernel's iommufd selftest component. This Use-After-Free (UAF) vulnerability occurs when the TRIGGER_IOPF function borrows an attach handle without proper synchronization during a PASID detach operation. A concurrent device fault report can then access memory that has been freed, leading to system instability, potential information disclosure, or arbitrary code execution.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-09-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89445.json)

**kernel: iommufd: Fix UAF in selftest IOPF reporting** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-18.

Affected:

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

No fix planned:

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

Not affected:

- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat OpenShift Container Platform 4

## Remediation

Affected