---
id: CVE-2020-14416
title: >-
  In the Linux kernel before 5.4.16, a race condition in tty->disc_data handling
  in the slip and slcan line discipline could lead to a use-after-free, aka
  CID-0ace17d56824
summary: >-
  In the Linux kernel before 5.4.16, a race condition in tty->disc_data handling
  in the slip and slcan line discipline could lead to a use-after-free, aka
  CID-0ace17d56824. This affects drivers/net/slip/slip.c and
  drivers/net/can/slcan.c.
severity: medium
cvss: 4.2
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:H'
cwe:
  - CWE-362
  - CWE-416
vendor: linux
product: linux_kernel
affected:
  - linux_kernel < 5.4.16
  - leap = 15.1
  - leap = 15.2
patched:
  - linux_kernel 5.4.16
published: '2020-06-18'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T21:17:23.767'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2020-14416'
references:
  - url: 'http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.html'
    label: cve@mitre.org
  - url: 'http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html'
    label: cve@mitre.org
  - url: 'https://bugzilla.suse.com/show_bug.cgi?id=1162002'
    label: cve@mitre.org
  - url: 'https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.16'
    label: cve@mitre.org
  - url: >-
      https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0ace17d56824165c7f4c68785d6b58971db954dd
    label: cve@mitre.org
  - url: 'http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://bugzilla.suse.com/show_bug.cgi?id=1162002'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.16'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0ace17d56824165c7f4c68785d6b58971db954dd
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00309
epssPercentile: 0.21877
ingestedAt: '2026-10-08T22:11:53.717Z'
---

## Overview

In the Linux kernel before 5.4.16, a race condition in tty->disc_data handling in the slip and slcan line discipline could lead to a use-after-free, aka CID-0ace17d56824. This affects drivers/net/slip/slip.c and drivers/net/can/slcan.c.

## Affected

- `linux_kernel < 5.4.16`
- `leap = 15.1`
- `leap = 15.2`

## Remediation

Upgrade past the affected range:

- `linux_kernel 5.4.16`