---
id: CVE-2024-50058
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  serial: protect uart_port_dtr_rts() in uart_shutdown() too

  Commit af224ca2df29 (serial: core: Prevent unsafe uart port access, part
  3) added few uport == NULL checks
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  serial: protect uart_port_dtr_rts() in uart_shutdown() too

  Commit af224ca2df29 (serial: core: Prevent unsafe uart port access, part
  3) added few uport == NULL checks. …
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-476
vendor: linux
product: linux_kernel
affected:
  - linux_kernel < 6.6.57
  - 'linux_kernel >= 6.7, < 6.11.4'
patched:
  - linux_kernel 6.11.4
published: '2024-10-21'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T01:19:06.690'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2024-50058'
references:
  - url: 'https://git.kernel.org/stable/c/2fe399bb8efd0d325ab1138cf8e3ecf23a39e96d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/399927f0f875b93f3d5a0336d382ba48b8671eb2'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/602babaa84d627923713acaf5f7e9a4369e77473'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/76ed24a34223bb2c6b6162e1d8389ec4e602a290'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d7b5876a6e74cdf8468a478be6b23f2f5464ac7a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e418d91195d29d5f9c9685ff309b92b04b41dc40'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-265688.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - cve.org
epss: 0.00245
epssPercentile: 0.15699
ingestedAt: '2026-10-15T03:30:12.762Z'
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2024-10-22T13:23:14.442818Z'
---

## Overview

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

serial: protect uart_port_dtr_rts() in uart_shutdown() too

Commit af224ca2df29 (serial: core: Prevent unsafe uart port access, part
3) added few uport == NULL checks. It added one to uart_shutdown(), so
the commit assumes, uport can be NULL in there. But right after that
protection, there is an unprotected "uart_port_dtr_rts(uport, false);"
call. That is invoked only if HUPCL is set, so I assume that is the
reason why we do not see lots of these reports.

Or it cannot be NULL at this point at all for some reason :P.

Until the above is investigated, stay on the safe side and move this
dereference to the if too.

I got this inconsistency from Coverity under CID 1585130. Thanks.

## Affected

- `linux_kernel < 6.6.57`
- `linux_kernel >= 6.7, < 6.11.4`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.11.4`