---
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: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= df0383ffad64dc09954a60873c1e202b47f08d90 <
    fb7393519908befdc094be4ea913f582adbf2f7c
  - >-
    Linux >= df0383ffad64dc09954a60873c1e202b47f08d90 <
    7177c215e69658adbd2f2fc5b72e14be9208d2ba
  - >-
    Linux >= df0383ffad64dc09954a60873c1e202b47f08d90 <
    1f44d001620fd3caa30619a9bc73e9d15555408b
  - >-
    Linux >= df0383ffad64dc09954a60873c1e202b47f08d90 <
    62efee351566321ad72a4abaf6eb7d972590585d
  - >-
    Linux >= df0383ffad64dc09954a60873c1e202b47f08d90 <
    eed73a65ab609b79d53de88cccc34b36dfe753c4
  - Linux 6.6
published: '2026-09-25'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T14:17:15.000'
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
tags:
  - nvd
  - cve.org
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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.