---
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: high
cvss: 7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-366
  - CWE-457
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= bce761d757452ba5eb77e11fecc37a04b67494e7 <
    75b37b8369778b69ce9738d1c97685a1615cb252
  - >-
    Linux >= bce761d757452ba5eb77e11fecc37a04b67494e7 <
    dae8dda341d2d9034a90d59e8a7d502e1263813f
  - Linux 6.8
published: '2026-09-25'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T11:18:09.967'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98032'
references:
  - url: 'https://git.kernel.org/stable/c/3f30b2cd4eba45c05f822f03f1b0f4077d6d4dc3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - 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
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98032.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-98032'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2541263'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-98032'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98032'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98032.mbox
  - url: 'https://git.kernel.org/stable/c/574efd988d116bd56ac688ab2d64e06ba0da982a'
  - url: 'https://kernelcve.org/list/?q=CVE-2026-98032'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00168
epssPercentile: 0.05974
cvssSource: vendor
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.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10 · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98032.json)