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CVE-2019-20388

26
FAUCET Score

CVE-2019-20388 describes a memory leak vulnerability (CWE-401) in the xmlSchemaPreRun function of libxml2 version 2.9.10, impacting various products including Debian, Fedora, NetApp, OpenSUSE, Oracle, and xmlsoft. This vulnerability carries a CVSS v3.1 score of 7.5 (High), indicating it can be exploited remotely with low attack complexity, leading to high availability impact (denial of service) without requiring user interaction or privileges. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage, suggesting it is not widely targeted.

Impacted Technologies

VendorProductVersion(s)CPE
2.9.10CPE matchmatch criteria
cpe:2.3:a:xmlsoft:libxml2:2.9.10:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:netapp:clustered_data_ontap:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
4.27%
Probability of exploitation in next 30 days
EPSS Percentile
90.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0427 is in the 82nd percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (27)

microsoftpatch availablevia msrc
Product: CBL Mariner 1.0 x64Fixed in: 2.9.10-2
microsoftpatch availablevia msrc
Product: 17048-16820Fixed in: 2.9.10-2
microsoftpatch availablevia msrc
Product: cm1 libxml2 2.9.10-2 on CBL Mariner 1.0Fixed in: 2.9.10-2
microsoftpatch availablevia msrc
Product: CBL Mariner 1.0 ARMFixed in: 2.9.10-2
oraclepatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 6Fixed in: jbcs-httpd24-curl-0:7.64.1-36.jbcs.el6
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 6Fixed in: jbcs-httpd24-mod_jk-0:1.2.48-4.redhat_1.jbcs.el6
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 6Fixed in: jbcs-httpd24-mod_md-1:2.0.8-24.jbcs.el6
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 6Fixed in: jbcs-httpd24-mod_security-0:2.9.2-51.GA.jbcs.el6
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 6Fixed in: jbcs-httpd24-nghttp2-0:1.39.2-25.jbcs.el6
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 7Fixed in: jbcs-httpd24-curl-0:7.64.1-36.jbcs.el7
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 7Fixed in: jbcs-httpd24-httpd-0:2.4.37-57.jbcs.el7
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 7Fixed in: jbcs-httpd24-mod_cluster-native-0:1.3.14-4.Final_redhat_2.jbcs.el7
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 7Fixed in: jbcs-httpd24-mod_http2-0:1.15.7-3.jbcs.el7
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 7Fixed in: jbcs-httpd24-mod_jk-0:1.2.48-4.redhat_1.jbcs.el7
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 7Fixed in: jbcs-httpd24-mod_md-1:2.0.8-24.jbcs.el7
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 7Fixed in: jbcs-httpd24-mod_security-0:2.9.2-51.GA.jbcs.el7
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 7Fixed in: jbcs-httpd24-nghttp2-0:1.39.2-25.jbcs.el7
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 7Fixed in: jbcs-httpd24-openssl-pkcs11-0:0.4.10-7.jbcs.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: libxml2-0:2.9.1-6.el7.5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: libxml2-0:2.9.7-8.el8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift DoFixed in: openshiftdo/odo-init-image-rhel7:1.1.3-2
View patch
redhatpatch availablevia redhat_api
Product: Text-Only JBCSFixed in: libxml2
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 6Fixed in: jbcs-httpd24-mod_http2-0:1.15.7-3.jbcs.el6
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 6Fixed in: jbcs-httpd24-mod_cluster-native-0:1.3.14-4.Final_redhat_2.jbcs.el6
View patch
redhatpatch availablevia redhat_api
Product: JBoss Core Services on RHEL 6Fixed in: jbcs-httpd24-httpd-0:2.4.37-57.jbcs.el6
View patch
redhatno patchvia redhat_api
Product: Red Hat 3scale API Management Platform 2Fixed in: system

Vendor Advisories (3)

microsoft2020-Aug/CVE-2019-20388

CVE-2019-20388

Aug 11, 2020
redhatCVE-2019-20388Moderate

libxml2: memory leak in xmlSchemaPreRun in xmlschemas.c

Jan 21, 2020
microsoft2020-Jan/CVE-2019-20388Important

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

Jan 14, 2020

References

lists.opensuse.org / opensuse-security-announce/2020-05/msg00047.html
Mailing ListThird Party Advisory
gitlab.gnome.org / GNOME/libxml2/merge_requests/68
PatchThird Party Advisory
lists.debian.org / debian-lts-announce/2020/09/msg00009.html
Mailing ListThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/545SPOI3ZPPNPX4TFRIVE4JVRTJRKULL
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/5R55ZR52RMBX24TQTWHCIWKJVRV6YAWI
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/JDPF3AAVKUAKDYFMFKSIQSVVS3EEFPQH
security.gentoo.org / glsa/202010-04
Third Party Advisory
security.netapp.com / advisory/ntap-20200702-0005
Third Party Advisory
oracle.com / security-alerts/cpuapr2022.html
PatchThird Party Advisory
oracle.com / security-alerts/cpujul2020.html
PatchThird Party Advisory
oracle.com / security-alerts/cpujul2022.html
oracle.com / security-alerts/cpuoct2021.html
PatchThird Party Advisory