---
id: CVE-2019-20388
title: >-
  xmlSchemaPreRun in xmlschemas.c in libxml2 2.9.10 allows an
  xmlSchemaValidateStream memory leak.
summary: >-
  xmlSchemaPreRun in xmlschemas.c in libxml2 2.9.10 allows an
  xmlSchemaValidateStream memory leak.
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-401
  - CWE-401
vendor: xmlsoft
product: libxml2
affected:
  - libxml2 = 2.9.10
  - debian_linux = 9.0
  - cloud_backup
  - clustered_data_ontap
  - ontap_select_deploy_administration_utility
  - plug-in_for_symantec_netbackup
  - smi-s_provider
  - snapdrive
  - steelstore_cloud_integrated_storage
  - h300s_firmware
  - h500s_firmware
  - h700s_firmware
  - h300e_firmware
  - h500e_firmware
  - h700e_firmware
  - h410s_firmware
  - >-
    communications_cloud_native_core_network_function_cloud_native_environment =
    1.10.0
  - enterprise_manager_base_platform = 13.4.0.0
  - enterprise_manager_base_platform = 13.5.0.0
  - enterprise_manager_ops_center = 12.4.0.0
  - mysql_workbench <= 8.0.26
  - peoplesoft_enterprise_peopletools = 8.58
  - real_user_experience_insight = 13.3.1.0
  - real_user_experience_insight = 13.4.1.0
  - real_user_experience_insight = 13.5.1.0
  - leap = 15.1
  - fedora = 30
  - fedora = 31
  - fedora = 32
published: '2020-01-21'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T08:17:01.130'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2019-20388'
references:
  - url: 'http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00047.html'
    label: cve@mitre.org
  - url: 'https://gitlab.gnome.org/GNOME/libxml2/merge_requests/68'
    label: cve@mitre.org
  - url: 'https://lists.debian.org/debian-lts-announce/2020/09/msg00009.html'
    label: cve@mitre.org
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/545SPOI3ZPPNPX4TFRIVE4JVRTJRKULL/
    label: cve@mitre.org
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5R55ZR52RMBX24TQTWHCIWKJVRV6YAWI/
    label: cve@mitre.org
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JDPF3AAVKUAKDYFMFKSIQSVVS3EEFPQH/
    label: cve@mitre.org
  - url: 'https://security.gentoo.org/glsa/202010-04'
    label: cve@mitre.org
  - url: 'https://security.netapp.com/advisory/ntap-20200702-0005/'
    label: cve@mitre.org
  - url: 'https://www.oracle.com/security-alerts/cpuapr2022.html'
    label: cve@mitre.org
  - url: 'https://www.oracle.com/security-alerts/cpujul2020.html'
    label: cve@mitre.org
  - url: 'https://www.oracle.com/security-alerts/cpujul2022.html'
    label: cve@mitre.org
  - url: 'https://www.oracle.com/security-alerts/cpuoct2021.html'
    label: cve@mitre.org
  - url: 'http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00047.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://gitlab.gnome.org/GNOME/libxml2/merge_requests/68'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2020/09/msg00009.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/545SPOI3ZPPNPX4TFRIVE4JVRTJRKULL/
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5R55ZR52RMBX24TQTWHCIWKJVRV6YAWI/
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JDPF3AAVKUAKDYFMFKSIQSVVS3EEFPQH/
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security.gentoo.org/glsa/202010-04'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security.netapp.com/advisory/ntap-20200702-0005/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.oracle.com/security-alerts/cpuapr2022.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.oracle.com/security-alerts/cpujul2020.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.oracle.com/security-alerts/cpujul2022.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.oracle.com/security-alerts/cpuoct2021.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-398330.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
epss: 0.03145
epssPercentile: 0.87607
ingestedAt: '2026-10-14T08:23:04.330Z'
---

## Overview

xmlSchemaPreRun in xmlschemas.c in libxml2 2.9.10 allows an xmlSchemaValidateStream memory leak.

## Affected

- `libxml2 = 2.9.10`
- `debian_linux = 9.0`
- `cloud_backup`
- `clustered_data_ontap`
- `ontap_select_deploy_administration_utility`
- `plug-in_for_symantec_netbackup`
- `smi-s_provider`
- `snapdrive`
- `steelstore_cloud_integrated_storage`
- `h300s_firmware`
- `h500s_firmware`
- `h700s_firmware`
- `h300e_firmware`
- `h500e_firmware`
- `h700e_firmware`
- `h410s_firmware`
- `communications_cloud_native_core_network_function_cloud_native_environment = 1.10.0`
- `enterprise_manager_base_platform = 13.4.0.0`
- `enterprise_manager_base_platform = 13.5.0.0`
- `enterprise_manager_ops_center = 12.4.0.0`
- `mysql_workbench <= 8.0.26`
- `peoplesoft_enterprise_peopletools = 8.58`
- `real_user_experience_insight = 13.3.1.0`
- `real_user_experience_insight = 13.4.1.0`
- `real_user_experience_insight = 13.5.1.0`
- `leap = 15.1`
- `fedora = 30`
- `fedora = 31`
- `fedora = 32`

## Remediation

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