---
id: CVE-2026-98613
title: >-
  kernel: bpf: Bound ownership depth through local kptrs and graph roots
  (CVE-2026-98613)
summary: >-
  A flaw was found in the Linux kernel's BPF (Berkeley Packet Filter) subsystem.
  A local user with permissions to load BPF programs can trigger a Denial of
  Service (DoS) by creating deeply nested or cyclical object references using
  local ker…
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-770
vendor: Red Hat
product: Red Hat Enterprise Linux 9
affected:
  - enterprise_linux 10
  - enterprise_linux 9
  - openshift_container_platform 4
published: '2026-10-18'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T08:25:06+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98613.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98613.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-98613'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2555009'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-98613'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98613'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98613.mbox
  - url: 'https://git.kernel.org/stable/c/92aa0502c781d72bb9685245c3280efb3766a110'
  - url: 'https://git.kernel.org/stable/c/9c11e543fec32e92b3aa3f693339ca3ee79ea9dd'
  - url: 'https://git.kernel.org/stable/c/4105870a4b8afe852aeb24a6dd58e1836cc4ce58'
  - url: 'https://git.kernel.org/stable/c/bfc888f04588f591851e95c974954cfca58e6c19'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00177
epssPercentile: 0.07197
ingestedAt: '2026-10-18T15:45:12.240Z'
---

## Overview

A flaw was found in the Linux kernel's BPF (Berkeley Packet Filter) subsystem. A local user with permissions to load BPF programs can trigger a Denial of Service (DoS) by creating deeply nested or cyclical object references using local kernel pointers. During object cleanup, synchronous recursive processing can exhaust available kernel stack space, resulting in a system crash.

## 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 2026-10-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98613.json)

**kernel: bpf: Bound ownership depth through local kptrs and graph roots** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-21.

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 Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

## Remediation

Fix deferred