---
id: CVE-2026-98806
title: >-
  kernel: octeontx2-pf: Fix aura BPID assignment when CONFIG_DCB is enabled
  (CVE-2026-98806)
summary: >-
  A flaw was found in the Linux kernel's octeontx2-pf network driver. When Data
  Center Bridging (DCB) is enabled, the driver assumes traffic queue mapping
  structures are always initialized, which is not the case for System Data Path
  (SDP) vi…
severity: medium
cvss: 4.4
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe: CWE-476
vendor: Red Hat
product: Red Hat Enterprise Linux 10
affected:
  - enterprise_linux 10
published: '2026-10-18'
updated: '2026-10-23'
sourceUpdated: '2026-10-23T17:10:45+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98806.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98806.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-98806'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2555242'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-98806'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98806'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98806.mbox
  - url: 'https://git.kernel.org/stable/c/59fbbded05e559675930fd521b8d62b72828b52d'
  - url: 'https://git.kernel.org/stable/c/056994563935e049093f100efaad7e63ad113814'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.0018
epssPercentile: 0.0754
ingestedAt: '2026-10-18T16:47:32.480Z'
---

## Overview

A flaw was found in the Linux kernel's octeontx2-pf network driver. When Data Center Bridging (DCB) is enabled, the driver assumes traffic queue mapping structures are always initialized, which is not the case for System Data Path (SDP) virtual functions. This issue leads to a NULL pointer dereference during backpressure identifier assignment, allowing a local user to crash the system and cause a Denial of Service (DoS) via an invalid memory access.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10 · no fix planned: Red Hat Enterprise Linux 10 · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98806.json)

**kernel: octeontx2-pf: Fix aura BPID assignment when CONFIG_DCB is enabled** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-23.

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

Fix deferred