---
id: CVE-2019-19462
title: >-
  relay_open in kernel/relay.c in the Linux kernel through 5.4.1 allows local
  users to cause a denial of service (such as relay blockage) by triggering a
  NULL alloc_percpu result.
summary: >-
  relay_open in kernel/relay.c in the Linux kernel through 5.4.1 allows local
  users to cause a denial of service (such as relay blockage) by triggering a
  NULL alloc_percpu result.
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: netapp
product: active_iq_unified_manager
affected:
  - linux_kernel <= 5.4.1
  - active_iq_unified_manager >= 9.5
  - hci_management_node
  - solidfire
  - hci_compute_node
  - hci_storage_node
  - ubuntu_linux = 14.04
  - ubuntu_linux = 16.04
  - ubuntu_linux = 18.04
  - ubuntu_linux = 20.04
  - leap = 15.1
  - leap = 15.2
  - debian_linux = 8.0
  - debian_linux = 9.0
  - debian_linux = 10.0
published: '2019-11-30'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T21:17:19.093'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2019-19462'
references:
  - url: 'http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html'
    label: cve@mitre.org
  - url: 'http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.html'
    label: cve@mitre.org
  - url: 'https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html'
    label: cve@mitre.org
  - url: 'https://lore.kernel.org/lkml/20191129013745.7168-1-dja%40axtens.net/'
    label: cve@mitre.org
  - url: 'https://security.netapp.com/advisory/ntap-20210129-0004/'
    label: cve@mitre.org
  - url: >-
      https://syzkaller-ppc64.appspot.com/bug?id=1c09906c83a8ea811a9e318c2a4f8e243becc6f8
    label: cve@mitre.org
  - url: >-
      https://syzkaller-ppc64.appspot.com/bug?id=b05b4d005191cc375cdf848c3d4d980308d50531
    label: cve@mitre.org
  - url: >-
      https://syzkaller.appspot.com/bug?id=e4265490d26d6c01cd9bc79dc915ef0a1bf15046
    label: cve@mitre.org
  - url: >-
      https://syzkaller.appspot.com/bug?id=f4d1cb4330bd3ddf4a628332b4285407b2eedd7b
    label: cve@mitre.org
  - url: 'https://usn.ubuntu.com/4414-1/'
    label: cve@mitre.org
  - url: 'https://usn.ubuntu.com/4425-1/'
    label: cve@mitre.org
  - url: 'https://usn.ubuntu.com/4439-1/'
    label: cve@mitre.org
  - url: 'https://usn.ubuntu.com/4440-1/'
    label: cve@mitre.org
  - url: 'https://www.debian.org/security/2020/dsa-4698'
    label: cve@mitre.org
  - url: 'https://www.debian.org/security/2020/dsa-4699'
    label: cve@mitre.org
  - url: 'http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lore.kernel.org/lkml/20191129013745.7168-1-dja%40axtens.net/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security.netapp.com/advisory/ntap-20210129-0004/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://syzkaller-ppc64.appspot.com/bug?id=1c09906c83a8ea811a9e318c2a4f8e243becc6f8
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://syzkaller-ppc64.appspot.com/bug?id=b05b4d005191cc375cdf848c3d4d980308d50531
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://syzkaller.appspot.com/bug?id=e4265490d26d6c01cd9bc79dc915ef0a1bf15046
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://syzkaller.appspot.com/bug?id=f4d1cb4330bd3ddf4a628332b4285407b2eedd7b
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://usn.ubuntu.com/4414-1/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://usn.ubuntu.com/4425-1/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://usn.ubuntu.com/4439-1/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://usn.ubuntu.com/4440-1/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.debian.org/security/2020/dsa-4698'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.debian.org/security/2020/dsa-4699'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.0046
epssPercentile: 0.3788
ingestedAt: '2026-10-08T22:11:53.708Z'
---

## Overview

relay_open in kernel/relay.c in the Linux kernel through 5.4.1 allows local users to cause a denial of service (such as relay blockage) by triggering a NULL alloc_percpu result.

## Affected

- `linux_kernel <= 5.4.1`
- `active_iq_unified_manager >= 9.5`
- `hci_management_node`
- `solidfire`
- `hci_compute_node`
- `hci_storage_node`
- `ubuntu_linux = 14.04`
- `ubuntu_linux = 16.04`
- `ubuntu_linux = 18.04`
- `ubuntu_linux = 20.04`
- `leap = 15.1`
- `leap = 15.2`
- `debian_linux = 8.0`
- `debian_linux = 9.0`
- `debian_linux = 10.0`

## Remediation

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