---
id: CVE-2026-89750
title: >-
  kernel: tracing/user_events: Clear copied tracing state before fork
  duplication (CVE-2026-89750)
summary: >-
  A flaw was found in the Linux kernel's tracing/user_events component. This
  vulnerability arises when a child process, created via `fork`, exits and frees
  memory that the parent process still references. This creates a Use-After-Free
  (UAF) …
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe: CWE-825
vendor: Red Hat
product: Linux
affected:
  - >-
    Linux >= 7235759084a4f8524a46bd2638885ff3b34ce279 <
    33ce55b368b64d65941867add00e7f288cbb8234
  - >-
    Linux >= 7235759084a4f8524a46bd2638885ff3b34ce279 <
    63b39e49a4c9d68e010e96b26fc7374f0864f2b1
  - >-
    Linux >= 7235759084a4f8524a46bd2638885ff3b34ce279 <
    25a0758cf6bdbfddac2be71124c9bd0692f4b0b1
  - >-
    Linux >= 7235759084a4f8524a46bd2638885ff3b34ce279 <
    b799f67119aff179719a0b1e12441ebbdaaf62f9
  - >-
    Linux >= 7235759084a4f8524a46bd2638885ff3b34ce279 <
    390f6bd8583d177029d9df4bea6667509e55a765
  - Linux 6.4
published: '2026-09-11'
updated: '2026-09-21'
sourceUpdated: '2026-09-21T17:37:43+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89750.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89750.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89750'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532248'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89750'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89750'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89750.mbox
  - url: 'https://git.kernel.org/stable/c/33ce55b368b64d65941867add00e7f288cbb8234'
  - url: 'https://git.kernel.org/stable/c/63b39e49a4c9d68e010e96b26fc7374f0864f2b1'
  - url: 'https://git.kernel.org/stable/c/25a0758cf6bdbfddac2be71124c9bd0692f4b0b1'
  - url: 'https://git.kernel.org/stable/c/b799f67119aff179719a0b1e12441ebbdaaf62f9'
  - url: 'https://git.kernel.org/stable/c/390f6bd8583d177029d9df4bea6667509e55a765'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
  - score-dispute
epss: 0.0017
epssPercentile: 0.05631
scores:
  vendor: 5.5
  cna: 7.8
ingestedAt: '2026-09-14T15:23:07.448Z'
---

## Overview

A flaw was found in the Linux kernel's tracing/user_events component. This vulnerability arises when a child process, created via `fork`, exits and frees memory that the parent process still references. This creates a Use-After-Free (UAF) condition, where the parent process attempts to access freed memory. A local attacker could exploit this flaw to cause memory corruption, potentially leading to a denial of service or privilege escalation.

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-09-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89750.json)

**kernel: tracing/user_events: Clear copied tracing state before fork duplication** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-21.

Not affected:

- Red Hat Enterprise Linux 10
- 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

Refer to the advisory for fix availability.