---
id: CVE-2026-89746
title: >-
  kernel: tracing: Fix use-after-free with same-name named triggers
  (CVE-2026-89746)
summary: >-
  A flaw was found in the Linux kernel's tracing component. A local user can
  exploit a use-after-free vulnerability by registering multiple histogram
  triggers with the same name. This action causes the kernel to attempt to
  access freed memor…
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 9
affected:
  - enterprise_linux 10
  - enterprise_linux 9
  - openshift_container_platform 4
published: '2026-09-11'
updated: '2026-09-21'
sourceUpdated: '2026-09-21T17:37:00+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89746.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89746.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89746'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532209'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89746'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89746'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89746.mbox
  - url: 'https://git.kernel.org/stable/c/441aa6742dff70297b5f64533a07a6189a026e91'
  - url: 'https://git.kernel.org/stable/c/3a8534664426c071c2dfb5b4ffa36b18a2abfd79'
  - url: 'https://git.kernel.org/stable/c/477d762be4b0ffaf01429ccd88859e93b0ec28cc'
  - url: 'https://git.kernel.org/stable/c/b1a49c22de01faf176d44e5caa765e237353a579'
  - url: 'https://git.kernel.org/stable/c/83d1ae0406d8eade219a81b401e201702dd9dc55'
  - url: 'https://git.kernel.org/stable/c/a7318172aa332a161fb9618286e64454c827f8fd'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00159
epssPercentile: 0.05511
scores:
  vendor: 7
  cna: 7.8
ingestedAt: '2026-09-14T15:23:07.449Z'
---

## Overview

A flaw was found in the Linux kernel's tracing component. A local user can exploit a use-after-free vulnerability by registering multiple histogram triggers with the same name. This action causes the kernel to attempt to access freed memory, leading to a system crash and a Denial of Service (DoS).

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-09-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89746.json)

**kernel: tracing: Fix use-after-free with same-name named triggers** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-21.

Affected:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

No fix planned:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

Not affected:

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

## Remediation

Affected