---
id: CVE-2026-98567
title: 'kernel: net: xps: reject an out of range traffic class (CVE-2026-98567)'
summary: >-
  A flaw was found in the Linux kernel. A local privileged user could trigger a
  Denial of Service (DoS) or kernel memory corruption by causing an
  out-of-bounds memory write. This issue occurs in the Transmit Packet Steering
  (XPS) networking …
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-787
vendor: Red Hat
product: Red Hat Enterprise Linux 9
affected:
  - enterprise_linux 10
  - enterprise_linux 6
  - enterprise_linux 7
  - enterprise_linux 8
  - enterprise_linux 9
  - openshift_container_platform 4
published: '2026-10-18'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T02:46:10+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98567.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98567.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-98567'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2555028'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-98567'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98567'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98567.mbox
  - url: 'https://git.kernel.org/stable/c/967e10f40a0c6732db299cbe001df0e859196055'
  - url: 'https://git.kernel.org/stable/c/1cb8e40525a72c9f1e1cf94c68c172b3b9bbdc81'
  - url: 'https://git.kernel.org/stable/c/6ea8f643053f33622f9116e4e1db58306ece45e3'
  - url: 'https://git.kernel.org/stable/c/9e841723ba482d41ecbf90241c756a16cdfea949'
  - url: 'https://git.kernel.org/stable/c/eff227a3cb4d0089fbb85c73480bf8abf2e5ae7f'
  - url: 'https://git.kernel.org/stable/c/2cc1c3977acbffc417fb5b57699d1df3dcffb5fd'
  - url: 'https://git.kernel.org/stable/c/930318290d8509e864c015fe6c9239470b3c579c'
  - url: 'https://git.kernel.org/stable/c/4da3b7b8b50f3e2fde54a4c18a82a8e3f6223910'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00216
epssPercentile: 0.11996
ingestedAt: '2026-10-18T15:45:12.259Z'
---

## Overview

A flaw was found in the Linux kernel. A local privileged user could trigger a Denial of Service (DoS) or kernel memory corruption by causing an out-of-bounds memory write. This issue occurs in the Transmit Packet Steering (XPS) networking mechanism when traffic classes are decreased without clearing leftover entries, allowing out-of-range traffic class indexes to be accessed during queue configuration.

## Vendor advisories

- **Red Hat VEX** · Moderate · 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 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-10-20 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98567.json)

**kernel: net: xps: reject an out of range traffic class** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-20.

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

No fix planned:

- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

## Remediation

Out of support scope