---
id: CVE-2026-74602
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ring-buffer: Initialise reader page order in rb_allocate_cpu_buffer()

  In rb_allocate_cpu_buffer(), bpage->order was omitted, leaving it as 0.
  This is an issue for a ri…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ring-buffer: Initialise reader page order in rb_allocate_cpu_buffer()

  In rb_allocate_cpu_buffer(), bpage->order was omitted, leaving it as 0.
  This is an issue for a ri…
severity: none
published: '2026-08-22'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T13:10:00.187'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-74602'
references:
  - url: 'https://git.kernel.org/stable/c/2e37f2bf111429fbfa4d985b12df3ba496ca70aa'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/3b3e0a6ee5bb3ac000f135beef26b2b7ed1a771a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6d014e44b68ddd43f71288d2a4dbb1a259869149'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/7c620d89bae1a926ab7d626600285d3516c9f3c4'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00168
epssPercentile: 0.05628
ingestedAt: '2026-10-14T13:30:58.512Z'
---

## Overview

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

ring-buffer: Initialise reader page order in rb_allocate_cpu_buffer()

In rb_allocate_cpu_buffer(), bpage->order was omitted, leaving it as 0.
This is an issue for a ring-buffer with subbufs bigger than PAGE_SIZE if
when freed: free_buffer_page() relies on this value. Align the value
with the actual allocation size (buffer::subbuf_order).

## Remediation

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