---
id: CVE-2026-93214
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  usb: gadget: f_tcm: fix deadlock in usbg_make_tpg()

  usbg_make_tpg() held dep_lock while calling
  configfs_depend_item_unlocked(), which acquires the configfs root
  inode…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  usb: gadget: f_tcm: fix deadlock in usbg_make_tpg()

  usbg_make_tpg() held dep_lock while calling
  configfs_depend_item_unlocked(), which acquires the configfs root
  inode…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 4bb8548df632187d5db50878e71804af5f7c51ad <
    abad5daa41cf5d0a0a9cba0397d3a0e7f11e0277
  - >-
    Linux >= 4bb8548df632187d5db50878e71804af5f7c51ad <
    3639438a4c83ffc2e564c8c010b92137c5d11cfa
  - >-
    Linux >= 4bb8548df632187d5db50878e71804af5f7c51ad <
    78a14ea2284825055ab6c2a1f3489510f560f3a2
  - >-
    Linux >= 4bb8548df632187d5db50878e71804af5f7c51ad <
    eef3e62f90d86c1c5651742f84ecc9db1814a893
  - >-
    Linux >= 4bb8548df632187d5db50878e71804af5f7c51ad <
    f81a2da137b029a282b9bc64d2f267d242948659
  - >-
    Linux >= 4bb8548df632187d5db50878e71804af5f7c51ad <
    6bcd9ee6ad6989d1d85a7459687e45b7ad7568d9
  - >-
    Linux >= 4bb8548df632187d5db50878e71804af5f7c51ad <
    d90b0f90e30cd59b36005a4016b15cf02bcd7fb2
  - >-
    Linux >= 4bb8548df632187d5db50878e71804af5f7c51ad <
    9dbf74f4022f80f7669d2b3c22c5deb46c1b5674
  - Linux 4.5
published: '2026-09-24'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T16:17:16.397'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93214'
references:
  - url: 'https://git.kernel.org/stable/c/3639438a4c83ffc2e564c8c010b92137c5d11cfa'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6bcd9ee6ad6989d1d85a7459687e45b7ad7568d9'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/78a14ea2284825055ab6c2a1f3489510f560f3a2'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9dbf74f4022f80f7669d2b3c22c5deb46c1b5674'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/abad5daa41cf5d0a0a9cba0397d3a0e7f11e0277'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d90b0f90e30cd59b36005a4016b15cf02bcd7fb2'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/eef3e62f90d86c1c5651742f84ecc9db1814a893'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f81a2da137b029a282b9bc64d2f267d242948659'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-24T15:45:56.670Z'
---

## Overview

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

usb: gadget: f_tcm: fix deadlock in usbg_make_tpg()

usbg_make_tpg() held dep_lock while calling
configfs_depend_item_unlocked(), which acquires the configfs root
inode lock when operating across subsystems. This creates a circular
lock dependency with configfs_rmdir():

  dep_lock -> configfs root inode lock -> su_mutex -> dep_lock

In usbg_make_tpg(), dep_lock only serialized the read of opts->ready,
which is a monotonic flag that transitions from false to true exactly
once (in tcm_set_name()) and never reverts. Remove dep_lock from
usbg_make_tpg() entirely and use READ_ONCE/WRITE_ONCE to access
opts->ready locklessly instead.

## Remediation

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