---
id: CVE-2026-90158
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  m68k: nfcon: Do not call console_is_registered() in nfcon_device()

  Since 7c2af0f634f1 ("tty: tty_io: use console_list_lock for list
  synchronization") show_cons_active(…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  m68k: nfcon: Do not call console_is_registered() in nfcon_device()

  Since 7c2af0f634f1 ("tty: tty_io: use console_list_lock for list
  synchronization") show_cons_active(…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 7c2af0f634f1bc761ca827310dc7e8e586af502f <
    7d3f15a664d115584fc177b5f2cfbdb3e5a50d60
  - >-
    Linux >= 7c2af0f634f1bc761ca827310dc7e8e586af502f <
    e5e11274b5512e24a346ed83f8dd85e3389d2f4b
  - >-
    Linux >= 7c2af0f634f1bc761ca827310dc7e8e586af502f <
    be98f92fc244688a6bdecbc834cf2cd243056d9d
  - >-
    Linux >= 7c2af0f634f1bc761ca827310dc7e8e586af502f <
    d73441232f1f067eb659e94447b1353c16609711
  - >-
    Linux >= 7c2af0f634f1bc761ca827310dc7e8e586af502f <
    2f8e3cad53b5c36ab0ed5d3195bfc55c59ea61a5
  - Linux 6.2
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:17:08.963'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90158'
references:
  - url: 'https://git.kernel.org/stable/c/2f8e3cad53b5c36ab0ed5d3195bfc55c59ea61a5'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/7d3f15a664d115584fc177b5f2cfbdb3e5a50d60'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/be98f92fc244688a6bdecbc834cf2cd243056d9d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d73441232f1f067eb659e94447b1353c16609711'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e5e11274b5512e24a346ed83f8dd85e3389d2f4b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-17T16:21:47.873Z'
epss: 0.00209
epssPercentile: 0.0982
---

## Overview

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

m68k: nfcon: Do not call console_is_registered() in nfcon_device()

Since 7c2af0f634f1 ("tty: tty_io: use console_list_lock for list
synchronization") show_cons_active() calls the .device() method under
the console_list_lock, but console_is_registered() tries to acquire
console_list_lock as well, causing a deadlock.  It should not be
necessary to check console_is_registered() here since the function
should not be called in the fist place when the console is not
registered.

## Remediation

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