libxml2: memory leak in xmlParseBalancedChunkMemoryRecover in parser.c
Published Dec 24, 2019
7.5
HIGHCVSS 3.1
EPSS 5.56%
Description
xmlParseBalancedChunkMemoryRecover in parser.c in libxml2 before 2.9.10 has a memory leak related to newDoc->oldNs.
Affected products
No data.
Configuration 2
- 8.0
- 9.0
Configuration 3
- 13.3.1.0
Configuration 4
- 30
- 32
Configuration 5
- 12.04
- 14.04
- 16.04
- 18.04
- 19.10
Configuration 6
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
Configuration 7
- < 3.0
No data.
JBoss Core Services on RHEL 6
jbcs-httpd24-curl-0:7.64.1-36.jbcs.el6
Fixed · RHSA-2020:2644
JBoss Core Services on RHEL 6
jbcs-httpd24-httpd-0:2.4.37-57.jbcs.el6
Fixed · RHSA-2020:2644
JBoss Core Services on RHEL 6
jbcs-httpd24-mod_cluster-native-0:1.3.14-4.Final_redhat_2.jbcs.el6
Fixed · RHSA-2020:2644
JBoss Core Services on RHEL 6
jbcs-httpd24-mod_http2-0:1.15.7-3.jbcs.el6
Fixed · RHSA-2020:2644
JBoss Core Services on RHEL 6
jbcs-httpd24-mod_jk-0:1.2.48-4.redhat_1.jbcs.el6
Fixed · RHSA-2020:2644
JBoss Core Services on RHEL 6
jbcs-httpd24-mod_md-1:2.0.8-24.jbcs.el6
Fixed · RHSA-2020:2644
JBoss Core Services on RHEL 6
jbcs-httpd24-mod_security-0:2.9.2-51.GA.jbcs.el6
Fixed · RHSA-2020:2644
JBoss Core Services on RHEL 6
jbcs-httpd24-nghttp2-0:1.39.2-25.jbcs.el6
Fixed · RHSA-2020:2644
JBoss Core Services on RHEL 7
jbcs-httpd24-curl-0:7.64.1-36.jbcs.el7
Fixed · RHSA-2020:2644
JBoss Core Services on RHEL 7
jbcs-httpd24-httpd-0:2.4.37-57.jbcs.el7
Fixed · RHSA-2020:2644
JBoss Core Services on RHEL 7
jbcs-httpd24-mod_cluster-native-0:1.3.14-4.Final_redhat_2.jbcs.el7
Fixed · RHSA-2020:2644
JBoss Core Services on RHEL 7
jbcs-httpd24-mod_http2-0:1.15.7-3.jbcs.el7
Fixed · RHSA-2020:2644
JBoss Core Services on RHEL 7
jbcs-httpd24-mod_jk-0:1.2.48-4.redhat_1.jbcs.el7
Fixed · RHSA-2020:2644
JBoss Core Services on RHEL 7
jbcs-httpd24-mod_md-1:2.0.8-24.jbcs.el7
Fixed · RHSA-2020:2644
JBoss Core Services on RHEL 7
jbcs-httpd24-mod_security-0:2.9.2-51.GA.jbcs.el7
Fixed · RHSA-2020:2644
JBoss Core Services on RHEL 7
jbcs-httpd24-nghttp2-0:1.39.2-25.jbcs.el7
Fixed · RHSA-2020:2644
JBoss Core Services on RHEL 7
jbcs-httpd24-openssl-pkcs11-0:0.4.10-7.jbcs.el7
Fixed · RHSA-2020:2644
Red Hat Enterprise Linux 7
libxml2-0:2.9.1-6.el7.5
Fixed · RHSA-2020:3996
Red Hat Enterprise Linux 8
libxml2-0:2.9.7-8.el8
Fixed · RHSA-2020:4479
Red Hat Enterprise Linux 8
libxml2-0:2.9.7-8.el8
Fixed · RHSA-2020:4479
Red Hat JBoss Core Services
libxml2
Fixed · RHSA-2020:2646
Red Hat OpenShift Do
openshiftdo/odo-init-image-rhel7:1.1.3-2
Fixed · RHSA-2021:0949
Red Hat Enterprise Linux 5
libxml2
Out of support scope
Red Hat Enterprise Linux 6
libxml2
Out of support scope
Red Hat JBoss Web Server 5
libxml2
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| JBoss Core Services on RHEL 6 | jbcs-httpd24-curl-0:7.64.1-36.jbcs.el6 | Fixed | RHSA-2020:2644 |
| JBoss Core Services on RHEL 6 | jbcs-httpd24-httpd-0:2.4.37-57.jbcs.el6 | Fixed | RHSA-2020:2644 |
| JBoss Core Services on RHEL 6 | jbcs-httpd24-mod_cluster-native-0:1.3.14-4.Final_redhat_2.jbcs.el6 | Fixed | RHSA-2020:2644 |
| JBoss Core Services on RHEL 6 | jbcs-httpd24-mod_http2-0:1.15.7-3.jbcs.el6 | Fixed | RHSA-2020:2644 |
| JBoss Core Services on RHEL 6 | jbcs-httpd24-mod_jk-0:1.2.48-4.redhat_1.jbcs.el6 | Fixed | RHSA-2020:2644 |
| JBoss Core Services on RHEL 6 | jbcs-httpd24-mod_md-1:2.0.8-24.jbcs.el6 | Fixed | RHSA-2020:2644 |
| JBoss Core Services on RHEL 6 | jbcs-httpd24-mod_security-0:2.9.2-51.GA.jbcs.el6 | Fixed | RHSA-2020:2644 |
| JBoss Core Services on RHEL 6 | jbcs-httpd24-nghttp2-0:1.39.2-25.jbcs.el6 | Fixed | RHSA-2020:2644 |
| JBoss Core Services on RHEL 7 | jbcs-httpd24-curl-0:7.64.1-36.jbcs.el7 | Fixed | RHSA-2020:2644 |
| JBoss Core Services on RHEL 7 | jbcs-httpd24-httpd-0:2.4.37-57.jbcs.el7 | Fixed | RHSA-2020:2644 |
| JBoss Core Services on RHEL 7 | jbcs-httpd24-mod_cluster-native-0:1.3.14-4.Final_redhat_2.jbcs.el7 | Fixed | RHSA-2020:2644 |
| JBoss Core Services on RHEL 7 | jbcs-httpd24-mod_http2-0:1.15.7-3.jbcs.el7 | Fixed | RHSA-2020:2644 |
| JBoss Core Services on RHEL 7 | jbcs-httpd24-mod_jk-0:1.2.48-4.redhat_1.jbcs.el7 | Fixed | RHSA-2020:2644 |
| JBoss Core Services on RHEL 7 | jbcs-httpd24-mod_md-1:2.0.8-24.jbcs.el7 | Fixed | RHSA-2020:2644 |
| JBoss Core Services on RHEL 7 | jbcs-httpd24-mod_security-0:2.9.2-51.GA.jbcs.el7 | Fixed | RHSA-2020:2644 |
| JBoss Core Services on RHEL 7 | jbcs-httpd24-nghttp2-0:1.39.2-25.jbcs.el7 | Fixed | RHSA-2020:2644 |
| JBoss Core Services on RHEL 7 | jbcs-httpd24-openssl-pkcs11-0:0.4.10-7.jbcs.el7 | Fixed | RHSA-2020:2644 |
| Red Hat Enterprise Linux 7 | libxml2-0:2.9.1-6.el7.5 | Fixed | RHSA-2020:3996 |
| Red Hat Enterprise Linux 8 | libxml2-0:2.9.7-8.el8 | Fixed | RHSA-2020:4479 |
| Red Hat Enterprise Linux 8 | libxml2-0:2.9.7-8.el8 | Fixed | RHSA-2020:4479 |
| Red Hat JBoss Core Services | libxml2 | Fixed | RHSA-2020:2646 |
| Red Hat OpenShift Do | openshiftdo/odo-init-image-rhel7:1.1.3-2 | Fixed | RHSA-2021:0949 |
| Red Hat Enterprise Linux 5 | libxml2 | Out of support scope | n/a |
| Red Hat Enterprise Linux 6 | libxml2 | Out of support scope | n/a |
| Red Hat JBoss Web Server 5 | libxml2 | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
YesTechnical Impact
PartialDecision
n/aAssessed Dec 3, 2025 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (21 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 5.56% (0.05560) | 92.61th | v5 (v2026.06.15) |
| Jun 15, 2026 | 5.67% (0.05667) | 91.96th | v5 (v2026.06.15) |
| Nov 21, 2025 | 0.15% (0.00154) | 36.65th | v4 (v2025.03.14) |
| Nov 18, 2025 | 4.92% (0.04919) | 88.56th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.15% (0.00155) | 33.77th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.43% (0.00434) | 75.43th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.44% (0.00437) | 74.00th | v3 (v2023.03.01) |
| Nov 30, 2023 | 0.44% (0.00437) | 71.90th | v3 (v2023.03.01) |
| Nov 14, 2023 | 0.45% (0.00450) | 72.25th | v3 (v2023.03.01) |
| Nov 8, 2023 | 0.47% (0.00469) | 72.78th | v3 (v2023.03.01) |
| Oct 28, 2023 | 0.53% (0.00532) | 74.49th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.55% (0.00548) | 73.94th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.54% (0.01537) | 74.52th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.54% (0.01537) | 74.48th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.54% (0.01537) | 72.41th | v2 (v2022.01.01) |
| Feb 4, 2022 | 16.31% (0.16306) | 92.84th | v2 (v2022.01.01) |
| Feb 3, 2022 | 10.99% (0.10990) | 88.00th | v1 |
| Jan 6, 2022 | 10.99% (0.10990) | 87.86th | v1 |
| Sep 1, 2021 | 2.68% (0.02678) | 79.35th | v1 |
| Apr 16, 2021 | 2.68% (0.02678) | 0.00th | v1 |
| Apr 14, 2021 | 2.48% (0.02476) | 0.00th | v1 |
References (16)
- http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00047.html vendor-advisoryx_refsource_SUSEBroken Link
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00005.html vendor-advisoryx_refsource_SUSEBroken Link
- https://access.redhat.com/security/cve/CVE-2019-19956 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1788856 Issue Tracking
- https://cert-portal.siemens.com/productcert/pdf/ssa-292794.pdf x_refsource_CONFIRMThird Party Advisory
- https://gitlab.gnome.org/GNOME/libxml2/commit/5a02583c7e683896d84878bd90641d8d9b0d0549 x_refsource_MISCPatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/12/msg00032.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/09/msg00009.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5R55ZR52RMBX24TQTWHCIWKJVRV6YAWI/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JDPF3AAVKUAKDYFMFKSIQSVVS3EEFPQH/ vendor-advisoryx_refsource_FEDORA
- https://nvd.nist.gov/vuln/detail/CVE-2019-19956
- https://security.netapp.com/advisory/ntap-20200114-0002/ x_refsource_CONFIRMThird Party Advisory
- https://us-cert.cisa.gov/ics/advisories/icsa-21-103-08 x_refsource_CONFIRMThird Party AdvisoryUS Government Resource
- https://usn.ubuntu.com/4274-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2019-19956
- https://www.oracle.com/security-alerts/cpujul2020.html x_refsource_MISCThird Party Advisory
Change history (0)
No recorded changes yet.