---
id: CVE-2026-98004
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  iommu/riscv: Serialize command queue publishing

  Serialize command queue publishing so software producer state advances only
  after a command is written and the hardware…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  iommu/riscv: Serialize command queue publishing

  Serialize command queue publishing so software producer state advances only
  after a command is written and the hardware…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 856c0cfe5c5f6a2cc8d995872eb67bff9c68c57c <
    6d4c12ab9ab8db87411c863a54e0e97f9197afde
  - >-
    Linux >= 856c0cfe5c5f6a2cc8d995872eb67bff9c68c57c <
    ca58afa40946acd252a50fa4d4a86f15847a3d7d
  - Linux 6.13
published: '2026-09-25'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T11:17:28.637'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98004'
references:
  - url: 'https://git.kernel.org/stable/c/6d4c12ab9ab8db87411c863a54e0e97f9197afde'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ca58afa40946acd252a50fa4d4a86f15847a3d7d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-25T11:06:38.861Z'
---

## Overview

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

iommu/riscv: Serialize command queue publishing

Serialize command queue publishing so software producer state advances only
after a command is written and the hardware tail is updated. Wait for
hardware consumption outside the queue lock when the command queue is full
so other CPUs are not blocked behind a long poll.

## Remediation

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