---
id: CVE-2026-89747
title: >-
  kernel: tracing: Fix use-after-free in trace_pipe read on sub-buffer order
  change (CVE-2026-89747)
summary: >-
  A flaw was found in the Linux kernel's tracing component. A local attacker
  could exploit a use-after-free vulnerability, a type of memory corruption, by
  manipulating the `trace_pipe` functionality. This occurs when the system
  attempts to r…
severity: high
cvss: 7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: vendor
cwe: CWE-825
vendor: Red Hat
product: Red Hat Enterprise Linux 10
affected:
  - enterprise_linux 10
published: '2026-09-11'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T06:49:15+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89747.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89747.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89747'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532358'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89747'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89747'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89747.mbox
  - url: 'https://git.kernel.org/stable/c/05ebe1e1d7d38c2612bacfefe043a33572ae34cb'
  - url: 'https://git.kernel.org/stable/c/372f8534244d632ad5118e8a87a11291b01712d3'
  - url: 'https://git.kernel.org/stable/c/7a49d19ff9baaf61217e5ec14199c18bc2d93ee4'
  - url: 'https://git.kernel.org/stable/c/ddbe921ed16a0ad2d9e09574c3f3aabec7528325'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
  - score-dispute
epss: 0.0017
epssPercentile: 0.05568
scores:
  vendor: 4.1
  cna: 7.8
ingestedAt: '2026-09-14T15:23:07.472Z'
---

## Overview

A flaw was found in the Linux kernel's tracing component. A local attacker could exploit a use-after-free vulnerability, a type of memory corruption, by manipulating the `trace_pipe` functionality. This occurs when the system attempts to read from memory that has already been released, leading to unpredictable behavior. Successful exploitation could result in system instability or a denial of service.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10 · no fix planned: Red Hat Enterprise Linux 10 · updated 2026-09-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89747.json)

**kernel: tracing: Fix use-after-free in trace_pipe read on sub-buffer order change** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-16.

Affected:

- Red Hat Enterprise Linux 10

No fix planned:

- Red Hat Enterprise Linux 10

Not affected:

- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

## Remediation

Affected