---
id: CVE-2026-23292
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  scsi: target: Fix recursive locking in __configfs_open_file()

  In flush_write_buffer, &p->frag_sem is acquired and then the loaded store
  function is called, which, here…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  scsi: target: Fix recursive locking in __configfs_open_file()

  In flush_write_buffer, &p->frag_sem is acquired and then the loaded store
  function is called, which, here…
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-674
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 4.9.201, < 4.10'
  - 'linux_kernel >= 4.14.154, < 4.15'
  - 'linux_kernel >= 4.19.84, < 4.20'
  - 'linux_kernel >= 5.3.1, < 6.1.167'
  - 'linux_kernel >= 6.2, < 6.6.130'
  - 'linux_kernel >= 6.7, < 6.12.77'
  - 'linux_kernel >= 6.13, < 6.18.17'
  - 'linux_kernel >= 6.19, < 6.19.7'
  - linux_kernel = 5.3
  - linux_kernel = 7.0
patched:
  - linux_kernel 6.19.7
published: '2026-03-25'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T02:18:47.617'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-23292'
references:
  - url: 'https://git.kernel.org/stable/c/142eacb50fb903a4c10dee7e67b6e79ebb36a582'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/14d4ac19d1895397532eec407433c5d74d9da53b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/3161ef61f121d4573cad5b57c92188dcd9b284b3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/4fcfa424a581d823cb1a9676e3eefe6ca17e453a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9a5641024fbfd9b24fe65984ad85fea10a3ae438'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e8ef82cb6443d5f3260b1b830e17f03dda4229ea'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-784472.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - cve.org
epss: 0.00123
epssPercentile: 0.01839
ingestedAt: '2026-10-15T03:30:12.840Z'
---

## Overview

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

scsi: target: Fix recursive locking in __configfs_open_file()

In flush_write_buffer, &p->frag_sem is acquired and then the loaded store
function is called, which, here, is target_core_item_dbroot_store().  This
function called filp_open(), following which these functions were called
(in reverse order), according to the call trace:

  down_read
  __configfs_open_file
  do_dentry_open
  vfs_open
  do_open
  path_openat
  do_filp_open
  file_open_name
  filp_open
  target_core_item_dbroot_store
  flush_write_buffer
  configfs_write_iter

target_core_item_dbroot_store() tries to validate the new file path by
trying to open the file path provided to it; however, in this case, the bug
report shows:

db_root: not a directory: /sys/kernel/config/target/dbroot

indicating that the same configfs file was tried to be opened, on which it
is currently working on. Thus, it is trying to acquire frag_sem semaphore
of the same file of which it already holds the semaphore obtained in
flush_write_buffer(), leading to acquiring the semaphore in a nested manner
and a possibility of recursive locking.

Fix this by modifying target_core_item_dbroot_store() to use kern_path()
instead of filp_open() to avoid opening the file using filesystem-specific
function __configfs_open_file(), and further modifying it to make this fix
compatible.

## Affected

- `linux_kernel >= 4.9.201, < 4.10`
- `linux_kernel >= 4.14.154, < 4.15`
- `linux_kernel >= 4.19.84, < 4.20`
- `linux_kernel >= 5.3.1, < 6.1.167`
- `linux_kernel >= 6.2, < 6.6.130`
- `linux_kernel >= 6.7, < 6.12.77`
- `linux_kernel >= 6.13, < 6.18.17`
- `linux_kernel >= 6.19, < 6.19.7`
- `linux_kernel = 5.3`
- `linux_kernel = 7.0`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.19.7`