---
id: CVE-2026-90427
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  iommu/tegra241-cmdqv: Don't fall back to a freed smmu after devm_krealloc()

  __tegra241_cmdqv_probe() uses devm_krealloc() to grow @smmu into the larger
  tegra241_cmdqv,…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  iommu/tegra241-cmdqv: Don't fall back to a freed smmu after devm_krealloc()

  __tegra241_cmdqv_probe() uses devm_krealloc() to grow @smmu into the larger
  tegra241_cmdqv,…
severity: high
cvss: 7.4
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 918eb5c856f6ce4cf93b4b38e4b5e156905c5943 <
    86197679b293f0601c3331d545f99a70a7780aa9
  - >-
    Linux >= 918eb5c856f6ce4cf93b4b38e4b5e156905c5943 <
    d4d05f55e9da646ec03adfa77260eb46f4163749
  - Linux 6.12
published: '2026-09-17'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T11:18:03.030'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90427'
references:
  - url: 'https://git.kernel.org/stable/c/268cbe3a36ae57a2ec09601f343b92f6f092d505'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/86197679b293f0601c3331d545f99a70a7780aa9'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d4d05f55e9da646ec03adfa77260eb46f4163749'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90427.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-90427'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2536648'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-90427'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90427'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-90427.mbox
  - url: 'https://kernelcve.org/list/?q=CVE-2026-90427'
  - url: 'https://git.kernel.org/stable/c/ea2edb27ef2648d8687cd0fc3ec3ba1793436e7e'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
  - score-dispute
epss: 0.00173
epssPercentile: 0.06701
ingestedAt: '2026-09-17T16:21:47.792Z'
cwe:
  - CWE-416
scores:
  nvd: 7.4
  vendor: 4.7
  cna: 7.4
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

iommu/tegra241-cmdqv: Don't fall back to a freed smmu after devm_krealloc()

__tegra241_cmdqv_probe() uses devm_krealloc() to grow @smmu into the larger
tegra241_cmdqv, which frees the original @smmu once it relocates. A failure
after that returned NULL, and the caller then dereferenced the freed @smmu
on its fallback path.

Return an int and take @smmu by reference instead, then update *smmu to the
reallocated pointer after devm_krealloc() succeeds, so the caller and its
fallback path both use the live @smmu rather than the freed original.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## 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 2026-10-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90427.json)