---
id: CVE-2026-89451
title: >-
  kernel: iommu/sva: Set handle->dev before the SVA handle is visible
  (CVE-2026-89451)
summary: >-
  A flaw was found in the Linux kernel's IOMMU (Input/Output Memory Management
  Unit) SVA (Shared Virtual Addressing) component. A race condition during the
  attachment of an SVA handle can lead to a situation where a device pointer is
  not pro…
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-476
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: '2026-09-17'
sourceUpdated: '2026-09-17T19:17:01+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89451.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89451.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89451'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532460'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89451'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89451'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89451.mbox
  - url: 'https://git.kernel.org/stable/c/37a96a30617a4c96f048a5874c00509bc4fe4d85'
  - url: 'https://git.kernel.org/stable/c/530f8f9c3546cb3ebee1b135375aaee08a073ebb'
  - url: 'https://git.kernel.org/stable/c/968e9a1f71140c86dc4092f6b361e997923f3813'
  - url: 'https://git.kernel.org/stable/c/bcffb1c75da8fc9d51168ff9f09d471c26507912'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.002
epssPercentile: 0.10135
ingestedAt: '2026-09-14T00:35:28.531Z'
---

## Overview

A flaw was found in the Linux kernel's IOMMU (Input/Output Memory Management Unit) SVA (Shared Virtual Addressing) component. A race condition during the attachment of an SVA handle can lead to a situation where a device pointer is not properly initialized. A local attacker could exploit this flaw by triggering concurrent bind operations, potentially causing a null pointer dereference and a system crash, resulting in a Denial of Service (DoS).

## 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 2026-09-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89451.json)

**kernel: iommu/sva: Set handle->dev before the SVA handle is visible** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-17.

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

Fix deferred