---
id: CVE-2026-90425
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  iommu/tegra241-cmdqv: Require exactly one Stream ID for a vSID

  tegra241_vintf_init_vsid() maps a guest vSID to a single physical Stream ID
  taken from master->streams[0…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  iommu/tegra241-cmdqv: Require exactly one Stream ID for a vSID

  tegra241_vintf_init_vsid() maps a guest vSID to a single physical Stream ID
  taken from master->streams[0…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 4dc0d12474f9d4833c3dd96b73d61e406d3f5dc7 <
    9b37afb2d34d99ec4f8db28134181b5a8ec9a4a5
  - >-
    Linux >= 4dc0d12474f9d4833c3dd96b73d61e406d3f5dc7 <
    0b139ec4641c7d4163d8e345c26cc630e24fa43b
  - >-
    Linux >= 4dc0d12474f9d4833c3dd96b73d61e406d3f5dc7 <
    fb292bfc9be936dade7eef7ec5762de1201983d8
  - Linux 6.17
published: '2026-09-17'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T18:17:58.797'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90425'
references:
  - url: 'https://git.kernel.org/stable/c/0b139ec4641c7d4163d8e345c26cc630e24fa43b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9b37afb2d34d99ec4f8db28134181b5a8ec9a4a5'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/fb292bfc9be936dade7eef7ec5762de1201983d8'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
epss: 0.00173
epssPercentile: 0.05982
ingestedAt: '2026-09-17T16:21:47.793Z'
---

## Overview

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

iommu/tegra241-cmdqv: Require exactly one Stream ID for a vSID

tegra241_vintf_init_vsid() maps a guest vSID to a single physical Stream ID
taken from master->streams[0], and only warns when the device does not have
exactly one stream. A device with several streams gets only its first one
mapped, so a guest vSID invalidation cannot reach the others' ATC and IOTLB
entries; a device with none makes master->streams a ZERO_SIZE_PTR, read out
of bounds.

Reject the mapping with -EOPNOTSUPP if master->num_streams is not one.

## Remediation

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