---
id: CVE-2026-87660
title: >-
  An improper file permission and missing authorization vulnerability exists in
  the diagnostic kernel module subsystem of Brocade Fabric OS versions before
  9.2.2d and 10.0.0 through 10.0.0a1
summary: >-
  An improper file permission and missing authorization vulnerability exists in
  the diagnostic kernel module subsystem of Brocade Fabric OS versions before
  9.2.2d and 10.0.0 through 10.0.0a1. An unprivileged local user can invoke
  privilege…
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H'
cwe:
  - CWE-732
vendor: broadcom
product: fabric_operating_system
affected:
  - fabric_operating_system < 9.2.2d
  - 'fabric_operating_system >= 10.0.0, < 10.0.1'
patched:
  - fabric_operating_system 10.0.1
published: '2026-10-08'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T19:15:01.283'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-87660'
references:
  - url: 'https://support.broadcom.com/external/content/SecurityAdvisories/0/39155'
    label: sirt@brocade.com
tags:
  - nvd
  - cve.org
epss: 0.0011
epssPercentile: 0.01264
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-08T15:19:03.170420Z'
scores:
  nvd: 7.1
  cna: 7
ingestedAt: '2026-10-08T04:04:32.116Z'
---

## Overview

An improper file permission and missing authorization vulnerability exists in the diagnostic kernel module subsystem of Brocade Fabric OS versions before 9.2.2d and 10.0.0 through 10.0.0a1. An unprivileged local user can invoke privileged hardware tests, force system error conditions, reset hardware blades, or disrupt storage fabric operations.

## Affected

- `fabric_operating_system < 9.2.2d`
- `fabric_operating_system >= 10.0.0, < 10.0.1`

## Remediation

Upgrade past the affected range:

- `fabric_operating_system 10.0.1`