Description
xmlSchemaPreRun in xmlschemas.c in libxml2 2.9.10 allows an xmlSchemaValidateStream memory leak.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | libxml2 | 2.9.10+dfsg-2.1 | — |
| Debian 13 | libxml2 | 2.9.10+dfsg-2.1 | — |
| Debian 12 | libxml2 | 2.9.10+dfsg-2.1 | — |
| Debian 9 | libxml2 | 2.9.4+dfsg1-2.2+deb9u3 | DLA-2369-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | libxml2 | 2.9.10+dfsg-5ubuntu0.20.04.1 | USN-4991-1 |
| Ubuntu 18.04 LTS | libxml2 | 2.9.4+dfsg1-6.1ubuntu1.4 | USN-4991-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | libxml2 | 2.9.3+dfsg1-1ubuntu0.7+esm1 | USN-4991-1 |
| Ubuntu Pro 14.04 LTS | libxml2 | 2.9.1+dfsg1-3ubuntu4.13+esm2 | USN-4991-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | libxml2 +2 | 2.9.7-8.el8 | RHSA-2020:4479 |
| RHEL 7 | libxml2 +3 | 2.9.1-6.el7.5 | RHSA-2020:3996 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat JBoss Core Services 1 | jbcs-httpd24-curl +2 | 7.64.1-36.jbcs.el6 | RHSA-2020:2644 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-httpd +6 | 2.4.37-57.jbcs.el6 | RHSA-2020:2644 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_cluster-native | 1.3.14-4.Final_redhat_2.jbcs.el6 | RHSA-2020:2644 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_http2 | 1.15.7-3.jbcs.el6 | RHSA-2020:2644 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_jk +2 | 1.2.48-4.redhat_1.jbcs.el6 | RHSA-2020:2644 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_md | 1:2.0.8-24.jbcs.el6 | RHSA-2020:2644 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_security | 2.9.2-51.GA.jbcs.el6 | RHSA-2020:2644 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_ssl +1 | 1:2.4.37-57.jbcs.el6 | RHSA-2020:2644 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-nghttp2 +1 | 1.39.2-25.jbcs.el6 | RHSA-2020:2644 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-openssl-pkcs11 | 0.4.10-7.jbcs.el7 | RHSA-2020:2644 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | libxml2 | 2.9.7-3.19.8 | SUSE-SU-2020:1299-1 |
| SLES 15 SP1 | python-libxml2-python | 2.9.7-3.19.10 | SUSE-SU-2020:1299-1 |
| SLES 12 SP5 | libxml2 +1 | 2.9.4-46.34.1 | SUSE-SU-2020:2609-1 |
| SLES 11 SP4 | libxml2 +1 | 2.7.6-0.77.36.1 | SUSE-SU-2021:14729-1 |
| SLES 2 | python-libxml2-python | 2.9.7-3.19.10 | SUSE-SU-2020:1299-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP5 | libxml2 +1 | 2.9.4-46.34.1 | SUSE-SU-2020:2609-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | libxml2 +1 | 2.7.6-0.77.36.1 | SUSE-SU-2021:14729-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | libxml2 | 2.9.12-1.2 | openSUSE-SU-2024:11016-1 |
| openSUSE Tumbleweed | ruby3.2-rubygem-nokogiri | 1.13.9-1.7 | openSUSE-SU-2024:13165-1 |
| openSUSE Tumbleweed | rubygem-nokogiri | 1.13.3-1.1 | openSUSE-SU-2026:10356-1, openSUSE-SU-2025:14697-1, openSUSE-SU-2024:14174-1 |
| openSUSE Leap 15.1 | libxml2 +1 | 2.9.7-lp151.5.9.1 | openSUSE-SU-2020:0681-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | libxml2 | 2.9.10-r4 | — |
| Alpine v3.23 | libxml2 | 2.9.10-r4 | — |
| Alpine v3.22 | libxml2 | 2.9.10-r4 | — |
| Alpine v3.21 | libxml2 | 2.9.10-r4 | — |
| Alpine v3.20 | libxml2 | 2.9.10-r4 | — |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | libxml2 | 2.9.10-r4 | — |
| Alpine v3.18 | libxml2 | 2.9.10-r4 | — |
| Alpine v3.17 | libxml2 | 2.9.10-r4 | — |
| Alpine v3.16 | libxml2 | 2.9.10-r4 | — |
| Alpine v3.15 | libxml2 | 2.9.10-r4 | — |
| Alpine v3.14 | libxml2 | 2.9.10-r4 | — |
| Alpine v3.13 | libxml2 | 2.9.10-r4 | — |
| Alpine v3.12 | libxml2 | 2.9.10-r4 | — |
| Alpine v3.11 | libxml2 | 2.9.10-r3 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | libxml2 +3 | 2.9.1-6.amzn2.5.1 | ALAS2-2020-1534 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | libxml2 +2 | 2.9.7-8.0.1.el8 | ELSA-2020-4479 |
| Oracle Linux 7 | libxml2 +3 | 2.9.1-6.0.1.el7.5 | ELSA-2020-3996 |
Advisories 23
- SSA-398330 SSA-398330: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP >= V3.1.0 and < V3.1.5 Siemens ProductCERT · Oct 13, 2026
- RHSA-2020:4479 Red Hat Security Advisory: libxml2 security update Red Hat Security Advisories (RHSA) · Sep 21, 2026
- RHSA-2020:3996 Red Hat Security Advisory: libxml2 security and bug fix update Red Hat Security Advisories (RHSA) · Sep 21, 2026
- RHSA-2020:2644 Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.37 SP3 security update Red Hat Security Advisories (RHSA) · Sep 21, 2026
- WID-SEC-2025-0227 IBM QRadar SIEM: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 11, 2026
- USN-4991-1 libxml2 vulnerabilities Ubuntu Security Notices (USN) · Jun 29, 2026
- openSUSE-SU-2026:10356-1 ruby4.0-rubygem-nokogiri-1.18.9-1.4 on GA media SUSE / openSUSE Security Updates · Mar 14, 2026
- DLA-2369-1 libxml2 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2025:14697-1 ruby3.4-rubygem-nokogiri-1.18.2-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2609-1 Security update for libxml2 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11016-1 libxml2-2-2.9.12-1.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:14729-1 Security update for libxml2 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13165-1 ruby3.2-rubygem-nokogiri-1.13.9-1.7 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1299-1 Security update for libxml2 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:14174-1 ruby3.3-rubygem-nokogiri-1.15.5-1.5 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11912-1 ruby3.1-rubygem-nokogiri-1.13.3-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:0681-1 Security update for libxml2 SUSE / openSUSE Security Updates · Feb 4, 2026
- ICSA-23-348-10 Siemens SIMATIC S7-1500 CISA ICS & IT advisories · Aug 12, 2025
- WID-SEC-2023-1614 Tenable Security Nessus Network Monitor: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 25, 2023
- ICSA-21-336-06 Hitachi Energy APM Edge CISA ICS & IT advisories · Dec 2, 2021
- ELSA-2020-4479 Moderate: libxml2 security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 10, 2020
- ALAS2-2020-1534 Moderate: libxml2 security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Oct 22, 2020
- ELSA-2020-3996 Moderate: libxml2 security and bug fix update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Oct 6, 2020
References
- FEDORA-2020-41fe1680f6 vendor-advisory
- FEDORA-2020-0c71c00af4 vendor-advisory
- FEDORA-2020-7694e8be73 vendor-advisory
- openSUSE-SU-2020:0681 vendor-advisory
- https://www.oracle.com/security-alerts/cpujul2020.html
- https://gitlab.gnome.org/GNOME/libxml2/merge_requests/68
- https://security.netapp.com/advisory/ntap-20200702-0005/
- [debian-lts-announce] 20200909 [SECURITY] [DLA 2369-1] libxml2 security update mailing-list
- GLSA-202010-04 vendor-advisory
- https://www.oracle.com/security-alerts/cpuoct2021.html
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://www.oracle.com/security-alerts/cpujul2022.html