---
id: CVE-2026-90337
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  serial: core: do fallible allocations before the console can be registered

  serial_core_add_one_port() allocates uport->tty_groups after
  uart_configure_port(), which ma…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  serial: core: do fallible allocations before the console can be registered

  serial_core_add_one_port() allocates uport->tty_groups after
  uart_configure_port(), which ma…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 266dcff03eed0050b6af11aaf2a61ab837d7ba3f <
    c2aec15f78b2e6ccd9b94216a901248511355982
  - >-
    Linux >= 266dcff03eed0050b6af11aaf2a61ab837d7ba3f <
    1a0e4fbce5d9c1bc179a35a2fd9ed142664299e3
  - Linux 3.17
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:17:32.290'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90337'
references:
  - url: 'https://git.kernel.org/stable/c/1a0e4fbce5d9c1bc179a35a2fd9ed142664299e3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c2aec15f78b2e6ccd9b94216a901248511355982'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-17T16:21:47.820Z'
epss: 0.00189
epssPercentile: 0.08802
---

## Overview

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

serial: core: do fallible allocations before the console can be registered

serial_core_add_one_port() allocates uport->tty_groups after
uart_configure_port(), which may register the console. If the allocation
fails, the driver unwinds the port while its console remains registered.
The earlier uport->name allocation has a related failure path that leaves
state->uart_port linked to a port being freed.

Failslab reproduced a NULL dereference in PL011 console output and a KASAN
use-after-free in i.MX console output after failed binds.

Allocate the name and tty_groups before linking the port and configuring
it. Reserve space for the optional driver attribute group because
config_port() may populate uport->attr_group during configuration.

## Remediation

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