---
id: CVE-2026-97617
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ring-buffer: Check resize_disabled before publishing the new subbuf order

  ring_buffer_subbuf_order_set() stores the new order and only then walks
  the CPUs, returning -…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ring-buffer: Check resize_disabled before publishing the new subbuf order

  ring_buffer_subbuf_order_set() stores the new order and only then walks
  the CPUs, returning -…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 117c39200d9d760cbd5944bb89efb7b9c51965aa <
    f2099644e1b2a2c0805c5240d63ab0522d9d0174
  - >-
    Linux >= 117c39200d9d760cbd5944bb89efb7b9c51965aa <
    9fd4ea952e6ac12a63c3fe89f08ad02771aa2c06
  - >-
    Linux >= 117c39200d9d760cbd5944bb89efb7b9c51965aa <
    32bf47db9237c5b8b6f6aaa5356bb4c79d241f76
  - >-
    Linux >= 117c39200d9d760cbd5944bb89efb7b9c51965aa <
    d860c67c051685abb0460b593b193f0f45f4fa92
  - Linux 6.10
published: '2026-09-25'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T11:17:15.893'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-97617'
references:
  - url: 'https://git.kernel.org/stable/c/32bf47db9237c5b8b6f6aaa5356bb4c79d241f76'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9fd4ea952e6ac12a63c3fe89f08ad02771aa2c06'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d860c67c051685abb0460b593b193f0f45f4fa92'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f2099644e1b2a2c0805c5240d63ab0522d9d0174'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-25T11:06:38.898Z'
---

## Overview

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

ring-buffer: Check resize_disabled before publishing the new subbuf order

ring_buffer_subbuf_order_set() stores the new order and only then walks
the CPUs, returning -EBUSY if any of them has resizing disabled. A user
mapped buffer has resizing disabled, and __rb_map_vma() reads
buffer->subbuf_order without buffer->mutex, so an mmap of an already
mapped CPU racing the failing order change sizes the mapping with the
new order and inserts pages past the sub-buffer into the VMA.

Check the CPUs before storing the new order.

## Remediation

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