---
id: CVE-2026-80818
title: >-
  kernel: iommu/tegra241-cmdqv: Fix CMD_SYNC use-after-free on teardown
  (CVE-2026-80818)
summary: >-
  A flaw was found in the Linux kernel's iommu/tegra241-cmdqv driver. This
  vulnerability, a use-after-free, occurs when the system attempts to
  deinitialize a virtual interface during device teardown, accessing memory that
  has already been re…
severity: medium
cvss: 4.4
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe: CWE-416
vendor: Red Hat
product: Red Hat Enterprise Linux 9
affected:
  - enterprise_linux 10
  - enterprise_linux 9
  - openshift_container_platform 4
published: '2026-09-04'
updated: '2026-10-25'
sourceUpdated: '2026-10-25T23:14:19+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80818.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80818.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-80818'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2528541'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-80818'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-80818'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80818.mbox
  - url: 'https://kernelcve.org/list/?q=CVE-2026-80818'
  - url: 'https://git.kernel.org/stable/c/d2ab08437e913d9e4dda4dfd0d327446ec8717fc'
  - url: 'https://git.kernel.org/stable/c/a94309bb99eaf0c6a2ace4927864486d19458eb5'
  - url: 'https://git.kernel.org/stable/c/5994617e09ee6016c1b094f29d9c85cac944b477'
  - url: 'https://git.kernel.org/stable/c/9ff145a25c5c8a26b06ef7cf558fb536b18bba6d'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00209
epssPercentile: 0.10962
ingestedAt: '2026-10-19T09:16:01.505Z'
---

## Overview

A flaw was found in the Linux kernel's iommu/tegra241-cmdqv driver. This vulnerability, a use-after-free, occurs when the system attempts to deinitialize a virtual interface during device teardown, accessing memory that has already been released. A local attacker or a malicious device could exploit this to trigger a kernel panic, leading to a system crash and 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 2026-10-25 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80818.json)

**kernel: iommu/tegra241-cmdqv: Fix CMD_SYNC use-after-free on teardown** — rated Moderate by Red Hat. Released 2026-09-04, updated 2026-10-25.

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

Workarounds / mitigations:

- Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.