---
id: CVE-2026-100079
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  usb: typec: ucsi: unregister debugfs entries on teardown

  ucsi_register() creates per-instance debugfs entries, but
  ucsi_unregister() keeps them around until ucsi_destr…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  usb: typec: ucsi: unregister debugfs entries on teardown

  ucsi_register() creates per-instance debugfs entries, but
  ucsi_unregister() keeps them around until ucsi_destr…
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'
cwe:
  - CWE-772
  - CWE-459
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 6.6, < 6.6.157'
  - 'linux_kernel >= 6.7, < 6.12.110'
  - 'linux_kernel >= 6.13, < 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: '2026-10-02T20:18:49.117'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-100079'
references:
  - url: 'https://git.kernel.org/stable/c/1f44d001620fd3caa30619a9bc73e9d15555408b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/62efee351566321ad72a4abaf6eb7d972590585d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/7177c215e69658adbd2f2fc5b72e14be9208d2ba'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/eed73a65ab609b79d53de88cccc34b36dfe753c4'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/fb7393519908befdc094be4ea913f582adbf2f7c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-100079.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-100079'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2541420'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-100079'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-100079'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-100079.mbox
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00114
epssPercentile: 0.01442
ingestedAt: '2026-09-25T14:09:46.374Z'
---

## Overview

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

usb: typec: ucsi: unregister debugfs entries on teardown

ucsi_register() creates per-instance debugfs entries, but
ucsi_unregister() keeps them around until ucsi_destroy().

Drivers like ucsi_glink that unregister/register the same UCSI
instance across remoteproc restart then try to create an already
existing debugfs directory and log:

  debugfs: 'pmic_glink.ucsi.0' already exists in 'ucsi'

Unregister debugfs entries as part of ucsi_unregister(), and
clear ucsi->debugfs after freeing it so repeated unregister
paths remain safe.

## Affected

- `linux_kernel >= 6.6, < 6.6.157`
- `linux_kernel >= 6.7, < 6.12.110`
- `linux_kernel >= 6.13, < 6.18.52`
- `linux_kernel >= 6.19, < 7.2.6`

## Remediation

Upgrade past the affected range:

- `linux_kernel 7.2.6`

## Vendor advisories

- **Red Hat VEX** · Low · 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 2026-10-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-100079.json)