---
id: CVE-2026-100074
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  bpf: Mark bpf_refcount field as unique

  BPF_REFCOUNT is not marked as a unique field, while it should be
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  bpf: Mark bpf_refcount field as unique

  BPF_REFCOUNT is not marked as a unique field, while it should be. Fix
  this oversight.
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'
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 6.4, < 6.18.52'
  - 'linux_kernel >= 6.19, < 7.2.6'
patched:
  - linux_kernel 7.2.6
published: '2026-09-25'
updated: '2026-10-02'
sourceUpdated: '2026-10-02T15:08:08.060'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-100074'
references:
  - url: 'https://git.kernel.org/stable/c/61e655391cb19c31f94ecd4354f624c81ce4cf75'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/641f814965d733936ca3618d4d5a12a8fa9be00e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e42cede6f90177f4f92f80d3de18f628e61d2087'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/015f9fbcf3382c5eb563a157ee8cabb6fbfcfe5e'
  - url: 'https://git.kernel.org/stable/c/20b3c72c1b83054c568d2322a95e217fdc281bc3'
tags:
  - nvd
  - cve.org
epss: 0.00155
epssPercentile: 0.04609
ingestedAt: '2026-09-25T14:09:46.375Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

bpf: Mark bpf_refcount field as unique

BPF_REFCOUNT is not marked as a unique field, while it should be. Fix
this oversight.

## Affected

- `linux_kernel >= 6.4, < 6.18.52`
- `linux_kernel >= 6.19, < 7.2.6`

## Remediation

Upgrade past the affected range:

- `linux_kernel 7.2.6`