---
id: CVE-2026-98032
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  tracing: Fix subbuf resize races with trace_pipe_raw readers

  Concurrent subbuffer resizes may crash trace_pipe_raw readers or leak
  uninitialized memory to userspace du…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  tracing: Fix subbuf resize races with trace_pipe_raw readers

  Concurrent subbuffer resizes may crash trace_pipe_raw readers or leak
  uninitialized memory to userspace du…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= bce761d757452ba5eb77e11fecc37a04b67494e7 <
    75b37b8369778b69ce9738d1c97685a1615cb252
  - >-
    Linux >= bce761d757452ba5eb77e11fecc37a04b67494e7 <
    dae8dda341d2d9034a90d59e8a7d502e1263813f
  - Linux 6.8
published: '2026-09-25'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T11:17:31.900'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98032'
references:
  - url: 'https://git.kernel.org/stable/c/75b37b8369778b69ce9738d1c97685a1615cb252'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/dae8dda341d2d9034a90d59e8a7d502e1263813f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-25T11:06:38.852Z'
---

## Overview

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

tracing: Fix subbuf resize races with trace_pipe_raw readers

Concurrent subbuffer resizes may crash trace_pipe_raw readers or leak
uninitialized memory to userspace due to stale size values.

Modify ring_buffer_alloc_read_page() to handle the resizing of an
existing buffer_data_read_page if necessary and add a new
ring_buffer_read_page_size(). This new function enables ring-buffer
buffer_data_read_page users to not call the racy
ring_buffer_subbuf_size_get(). This makes the spare_size member of
ftrace_buffer_info redundant.

Finally, handle buffer_data_read_page/reader_page order discrepancy in
ring_buffer_read_page(). On a mismatch simply copy manually the data to
the buffer_data_read_page.

## Remediation

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