CVE catalog

CVE-2019-19956

libxml2: CVE-2019-19956

Severity: High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: Jan 1, 2019, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 5.63% · Oct 25, 2026

xmlParseBalancedChunkMemoryRecover in parser.c in libxml2 before 2.9.10 has a memory leak related to newDoc->oldNs.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	libxml2	sid	`2.15.4+dfsg-1`	fixed
Debian	libxml2	forky	`2.15.4+dfsg-1`	fixed
Debian	libxml2	trixie	`2.12.7+dfsg+really2.9.14-2.1+deb13u3`	fixed
Debian	libxml2	trixie-security	`2.12.7+dfsg+really2.9.14-2.1+deb13u1`	fixed
Debian	libxml2	bookworm	`2.9.14+dfsg-1.3~deb12u6`	fixed
Debian	libxml2	bookworm-security	`2.9.14+dfsg-1.3~deb12u4`	fixed
Cpe	libxml2	Not reported	`2.9.10`	fixed
Cpe	debian_linux	Not reported	Not reported	unknown
Cpe	real_user_experience_insight	Not reported	Not reported	unknown
Cpe	fedora	Not reported	Not reported	unknown
Cpe	ubuntu_linux	Not reported	Not reported	unknown
Cpe	active_iq_unified_manager	Not reported	Not reported	unknown
Cpe	clustered_data_ontap	Not reported	Not reported	unknown
Cpe	clustered_data_ontap_antivirus_connector	Not reported	Not reported	unknown
Cpe	manageability_software_development_kit	Not reported	Not reported	unknown
Cpe	ontap_select_deploy_administration_utility	Not reported	Not reported	unknown
Cpe	steelstore_cloud_integrated_storage	Not reported	Not reported	unknown
Cpe	sinema_remote_connect_server	Not reported	`3.0`	fixed
Alpine	libxml2	3.10	`2.9.9-r3`	fixed
Alpine	libxml2	3.8	`2.9.8-r2`	fixed
Alpine	libxml2	3.9	`2.9.9-r2`	fixed
Ubuntu	libxml2	pro	`2.9.1+dfsg1-3ubuntu2`	vulnerable
Ubuntu	libxml2	pro	`2.9.1+dfsg1-3ubuntu3`	vulnerable
Ubuntu	libxml2	pro	`2.9.1+dfsg1-3ubuntu4`	vulnerable
Ubuntu	libxml2	pro	`2.9.1+dfsg1-3ubuntu4.1`	vulnerable
Ubuntu	libxml2	pro	`2.9.1+dfsg1-3ubuntu4.2`	vulnerable
Ubuntu	libxml2	pro	`2.9.1+dfsg1-3ubuntu4.3`	vulnerable
Ubuntu	libxml2	pro	`2.9.1+dfsg1-3ubuntu4.4`	vulnerable
Ubuntu	libxml2	pro	`2.9.1+dfsg1-3ubuntu4.5`	vulnerable
Ubuntu	libxml2	pro	`2.9.1+dfsg1-3ubuntu4.6`	vulnerable
Ubuntu	libxml2	pro	`2.9.1+dfsg1-3ubuntu4.7`	vulnerable
Ubuntu	libxml2	pro	`2.9.1+dfsg1-3ubuntu4.8`	vulnerable
Ubuntu	libxml2	pro	`2.9.1+dfsg1-3ubuntu4.9`	vulnerable
Ubuntu	libxml2	pro	`2.9.1+dfsg1-3ubuntu4.10`	vulnerable
Ubuntu	libxml2	pro	`2.9.1+dfsg1-3ubuntu4.11`	vulnerable
Ubuntu	libxml2	pro	`2.9.1+dfsg1-3ubuntu4.12`	vulnerable
Ubuntu	libxml2	pro	`2.9.1+dfsg1-3ubuntu4.13`	vulnerable
Ubuntu	libxml2	pro	`2.9.1+dfsg1-3ubuntu4.13+esm1`	fixed
Ubuntu	libxml2	16.04	`2.9.2+zdfsg1-4`	vulnerable
Ubuntu	libxml2	16.04	`2.9.2+zdfsg1-4ubuntu1`	vulnerable
Ubuntu	libxml2	16.04	`2.9.2+zdfsg1-4ubuntu2`	vulnerable
Ubuntu	libxml2	16.04	`2.9.2+zdfsg1-4ubuntu3`	vulnerable
Ubuntu	libxml2	16.04	`2.9.3+dfsg1-1`	vulnerable
Ubuntu	libxml2	16.04	`2.9.3+dfsg1-1ubuntu0.1`	vulnerable
Ubuntu	libxml2	16.04	`2.9.3+dfsg1-1ubuntu0.2`	vulnerable
Ubuntu	libxml2	16.04	`2.9.3+dfsg1-1ubuntu0.3`	vulnerable
Ubuntu	libxml2	16.04	`2.9.3+dfsg1-1ubuntu0.4`	vulnerable
Ubuntu	libxml2	16.04	`2.9.3+dfsg1-1ubuntu0.5`	vulnerable
Ubuntu	libxml2	16.04	`2.9.3+dfsg1-1ubuntu0.6`	vulnerable
Ubuntu	libxml2	16.04	`2.9.3+dfsg1-1ubuntu0.7`	fixed
Ubuntu	libxml2	18.04	`2.9.4+dfsg1-4ubuntu1`	vulnerable
Ubuntu	libxml2	18.04	`2.9.4+dfsg1-5ubuntu1`	vulnerable
Ubuntu	libxml2	18.04	`2.9.4+dfsg1-5ubuntu2`	vulnerable
Ubuntu	libxml2	18.04	`2.9.4+dfsg1-5.1ubuntu1`	vulnerable
Ubuntu	libxml2	18.04	`2.9.4+dfsg1-5.2ubuntu1`	vulnerable
Ubuntu	libxml2	18.04	`2.9.4+dfsg1-6.1ubuntu1`	vulnerable
Ubuntu	libxml2	18.04	`2.9.4+dfsg1-6.1ubuntu1.2`	vulnerable
Ubuntu	libxml2	18.04	`2.9.4+dfsg1-6.1ubuntu1.3`	fixed
Ubuntu	libxml2	pro	`2.9.1+dfsg1-3ubuntu2`	vulnerable
Ubuntu	libxml2	pro	`2.9.1+dfsg1-3ubuntu3`	vulnerable
Ubuntu	libxml2	pro	`2.9.1+dfsg1-3ubuntu4`	vulnerable
Ubuntu	libxml2	pro	`2.9.1+dfsg1-3ubuntu4.1`	vulnerable
Ubuntu	libxml2	pro	`2.9.1+dfsg1-3ubuntu4.2`	vulnerable
Ubuntu	libxml2	pro	`2.9.1+dfsg1-3ubuntu4.3`	vulnerable
Ubuntu	libxml2	pro	`2.9.1+dfsg1-3ubuntu4.4`	vulnerable
Ubuntu	libxml2	pro	`2.9.1+dfsg1-3ubuntu4.5`	vulnerable
Ubuntu	libxml2	pro	`2.9.1+dfsg1-3ubuntu4.6`	vulnerable
Ubuntu	libxml2	pro	`2.9.1+dfsg1-3ubuntu4.7`	vulnerable
Ubuntu	libxml2	pro	`2.9.1+dfsg1-3ubuntu4.8`	vulnerable
Ubuntu	libxml2	pro	`2.9.1+dfsg1-3ubuntu4.9`	vulnerable
Ubuntu	libxml2	pro	`2.9.1+dfsg1-3ubuntu4.10`	vulnerable
Ubuntu	libxml2	pro	`2.9.1+dfsg1-3ubuntu4.11`	vulnerable
Ubuntu	libxml2	pro	`2.9.1+dfsg1-3ubuntu4.12`	vulnerable
Ubuntu	libxml2	pro	`2.9.1+dfsg1-3ubuntu4.13`	vulnerable
Ubuntu	libxml2	pro	`2.9.1+dfsg1-3ubuntu4.13+esm1`	fixed
Ubuntu	libxml2	16.04	`2.9.2+zdfsg1-4`	vulnerable
Ubuntu	libxml2	16.04	`2.9.2+zdfsg1-4ubuntu1`	vulnerable
Ubuntu	libxml2	16.04	`2.9.2+zdfsg1-4ubuntu2`	vulnerable
Ubuntu	libxml2	16.04	`2.9.2+zdfsg1-4ubuntu3`	vulnerable
Ubuntu	libxml2	16.04	`2.9.3+dfsg1-1`	vulnerable
Ubuntu	libxml2	16.04	`2.9.3+dfsg1-1ubuntu0.1`	vulnerable
Ubuntu	libxml2	16.04	`2.9.3+dfsg1-1ubuntu0.2`	vulnerable
Ubuntu	libxml2	16.04	`2.9.3+dfsg1-1ubuntu0.3`	vulnerable
Ubuntu	libxml2	16.04	`2.9.3+dfsg1-1ubuntu0.4`	vulnerable
Ubuntu	libxml2	16.04	`2.9.3+dfsg1-1ubuntu0.5`	vulnerable
Ubuntu	libxml2	16.04	`2.9.3+dfsg1-1ubuntu0.6`	vulnerable
Ubuntu	libxml2	16.04	`2.9.3+dfsg1-1ubuntu0.7`	fixed
Ubuntu	libxml2	18.04	`2.9.4+dfsg1-4ubuntu1`	vulnerable
Ubuntu	libxml2	18.04	`2.9.4+dfsg1-5ubuntu1`	vulnerable
Ubuntu	libxml2	18.04	`2.9.4+dfsg1-5ubuntu2`	vulnerable
Ubuntu	libxml2	18.04	`2.9.4+dfsg1-5.1ubuntu1`	vulnerable
Ubuntu	libxml2	18.04	`2.9.4+dfsg1-5.2ubuntu1`	vulnerable
Ubuntu	libxml2	18.04	`2.9.4+dfsg1-6.1ubuntu1`	vulnerable
Ubuntu	libxml2	18.04	`2.9.4+dfsg1-6.1ubuntu1.2`	vulnerable
Ubuntu	libxml2	18.04	`2.9.4+dfsg1-6.1ubuntu1.3`	fixed
Suse	libxml2	linux enterprise module for basesystem 15 sp2	`2.9.7-3.22.1`	fixed
Suse	python-libxml2-python	linux enterprise module for basesystem 15 sp2	`2.9.7-3.22.1`	fixed
Suse	python-libxml2-python	linux enterprise module for python 2 15 sp2	`2.9.7-3.22.1`	fixed
Suse	libxml2	linux enterprise software development kit 12 sp5	`2.9.4-46.34.1`	fixed
Suse	libxml2	linux enterprise server 12 sp5	`2.9.4-46.34.1`	fixed
Suse	python-libxml2	linux enterprise server 12 sp5	`2.9.4-46.34.1`	fixed
Suse	libxml2	linux enterprise server for sap applications 12 sp5	`2.9.4-46.34.1`	fixed
Suse	python-libxml2	linux enterprise server for sap applications 12 sp5	`2.9.4-46.34.1`	fixed
Suse	libxml2	linux enterprise module for basesystem 15 sp1	`2.9.7-3.19.8`	fixed
Suse	python-libxml2-python	linux enterprise module for basesystem 15 sp1	`2.9.7-3.19.10`	fixed
Suse	python-libxml2-python	linux enterprise module for python 2 15 sp1	`2.9.7-3.19.10`	fixed
Suse	libxml2	linux enterprise module for basesystem 15 sp1	`2.9.7-3.22.1`	fixed
Suse	python-libxml2-python	linux enterprise module for basesystem 15 sp1	`2.9.7-3.22.1`	fixed
Suse	python-libxml2-python	linux enterprise module for python 2 15 sp1	`2.9.7-3.22.1`	fixed
Opensuse	libxml2	leap 15.1	`2.9.7-lp151.5.12.1`	fixed
Opensuse	python-libxml2-python	leap 15.1	`2.9.7-lp151.5.12.1`	fixed
Opensuse	libxml2	leap 15.1	`2.9.7-lp151.5.9.1`	fixed
Opensuse	python-libxml2-python	leap 15.1	`2.9.7-lp151.5.9.1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	libxml2	source	sid	`2.9.10+dfsg-2`	not yet assigned	Not reported	Not reported
Debian	libxml2	source	forky	`2.9.10+dfsg-2`	not yet assigned	Not reported	Not reported
Debian	libxml2	source	trixie	`2.9.10+dfsg-2`	not yet assigned	Not reported	Not reported
Debian	libxml2	source	bookworm	`2.9.10+dfsg-2`	not yet assigned	Not reported	Not reported
Cpe	libxml2	cpe	Not reported	`2.9.10`	Not reported	NVD-CVE-2019-19956	Not reported
Cpe	sinema_remote_connect_server	cpe	Not reported	`3.0`	Not reported	NVD-CVE-2019-19956	Not reported
Alpine	libxml2	apk	3.10	`2.9.9-r3`	Not reported	ALPINE-CVE-2019-19956	Not reported
Alpine	libxml2	apk	3.8	`2.9.8-r2`	Not reported	ALPINE-CVE-2019-19956	Not reported
Alpine	libxml2	apk	3.9	`2.9.9-r2`	Not reported	ALPINE-CVE-2019-19956	Not reported
Ubuntu	libxml2	deb	pro	`2.9.1+dfsg1-3ubuntu4.13+esm1`	Not reported	USN-4274-1	Not reported
Ubuntu	libxml2	deb	16.04	`2.9.3+dfsg1-1ubuntu0.7`	Not reported	USN-4274-1	Not reported
Ubuntu	libxml2	deb	18.04	`2.9.4+dfsg1-6.1ubuntu1.3`	Not reported	USN-4274-1	Not reported
Ubuntu	libxml2	deb	pro	`2.9.1+dfsg1-3ubuntu4.13+esm1`	Not reported	UBUNTU-CVE-2019-19956	Not reported
Ubuntu	libxml2	deb	16.04	`2.9.3+dfsg1-1ubuntu0.7`	Not reported	UBUNTU-CVE-2019-19956	Not reported
Ubuntu	libxml2	deb	18.04	`2.9.4+dfsg1-6.1ubuntu1.3`	Not reported	UBUNTU-CVE-2019-19956	Not reported
Suse	libxml2	rpm	linux enterprise module for basesystem 15 sp2	`2.9.7-3.22.1`	Not reported	SUSE-SU-2020:1532-2	Not reported
Suse	python-libxml2-python	rpm	linux enterprise module for basesystem 15 sp2	`2.9.7-3.22.1`	Not reported	SUSE-SU-2020:1532-2	Not reported
Suse	python-libxml2-python	rpm	linux enterprise module for python 2 15 sp2	`2.9.7-3.22.1`	Not reported	SUSE-SU-2020:1532-2	Not reported
Suse	libxml2	rpm	linux enterprise software development kit 12 sp5	`2.9.4-46.34.1`	Not reported	SUSE-SU-2020:2609-1	Not reported
Suse	libxml2	rpm	linux enterprise server 12 sp5	`2.9.4-46.34.1`	Not reported	SUSE-SU-2020:2609-1	Not reported
Suse	python-libxml2	rpm	linux enterprise server 12 sp5	`2.9.4-46.34.1`	Not reported	SUSE-SU-2020:2609-1	Not reported
Suse	libxml2	rpm	linux enterprise server for sap applications 12 sp5	`2.9.4-46.34.1`	Not reported	SUSE-SU-2020:2609-1	Not reported
Suse	python-libxml2	rpm	linux enterprise server for sap applications 12 sp5	`2.9.4-46.34.1`	Not reported	SUSE-SU-2020:2609-1	Not reported
Suse	libxml2	rpm	linux enterprise module for basesystem 15 sp1	`2.9.7-3.19.8`	Not reported	SUSE-SU-2020:1299-1	Not reported
Suse	python-libxml2-python	rpm	linux enterprise module for basesystem 15 sp1	`2.9.7-3.19.10`	Not reported	SUSE-SU-2020:1299-1	Not reported
Suse	python-libxml2-python	rpm	linux enterprise module for python 2 15 sp1	`2.9.7-3.19.10`	Not reported	SUSE-SU-2020:1299-1	Not reported
Suse	libxml2	rpm	linux enterprise module for basesystem 15 sp1	`2.9.7-3.22.1`	Not reported	SUSE-SU-2020:1532-1	Not reported
Suse	python-libxml2-python	rpm	linux enterprise module for basesystem 15 sp1	`2.9.7-3.22.1`	Not reported	SUSE-SU-2020:1532-1	Not reported
Suse	python-libxml2-python	rpm	linux enterprise module for python 2 15 sp1	`2.9.7-3.22.1`	Not reported	SUSE-SU-2020:1532-1	Not reported
Opensuse	libxml2	rpm	leap 15.1	`2.9.7-lp151.5.12.1`	Not reported	OPENSUSE-SU-2020:0781-1	Not reported
Opensuse	python-libxml2-python	rpm	leap 15.1	`2.9.7-lp151.5.12.1`	Not reported	OPENSUSE-SU-2020:0781-1	Not reported
Opensuse	libxml2	rpm	leap 15.1	`2.9.7-lp151.5.9.1`	Not reported	OPENSUSE-SU-2020:0681-1	Not reported
Opensuse	python-libxml2-python	rpm	leap 15.1	`2.9.7-lp151.5.9.1`	Not reported	OPENSUSE-SU-2020:0681-1	Not reported

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[libxml2]Unknown
Details (4)
- 2.9.14+dfsg-1.3~deb12u6 · amd64 · bookworm
  Fixed · Fixed: 2.9.10+dfsg-2
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u6 · arm64 · bookworm
  Fixed · Fixed: 2.9.10+dfsg-2
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u4 · amd64 · bookworm-security
  Fixed · Fixed: 2.9.10+dfsg-2
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u4 · arm64 · bookworm-security
  Fixed · Fixed: 2.9.10+dfsg-2
  dsa · libxml2 · debian · bookworm
[libxml2-dev]Unknown
Source package: [libxml2]
Details (4)
- 2.9.14+dfsg-1.3~deb12u6 · amd64 · bookworm
  Fixed · Fixed: 2.9.10+dfsg-2
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u6 · arm64 · bookworm
  Fixed · Fixed: 2.9.10+dfsg-2
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u4 · amd64 · bookworm-security
  Fixed · Fixed: 2.9.10+dfsg-2
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u4 · arm64 · bookworm-security
  Fixed · Fixed: 2.9.10+dfsg-2
  dsa · libxml2 · debian · bookworm
[libxml2-doc]Unknown
Source package: [libxml2]
Details (4)
- 2.9.14+dfsg-1.3~deb12u6 · all · bookworm
  Fixed · Fixed: 2.9.10+dfsg-2
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u6 · all · bookworm
  Fixed · Fixed: 2.9.10+dfsg-2
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u4 · all · bookworm-security
  Fixed · Fixed: 2.9.10+dfsg-2
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u4 · all · bookworm-security
  Fixed · Fixed: 2.9.10+dfsg-2
  dsa · libxml2 · debian · bookworm
[libxml2-utils]Unknown
Source package: [libxml2]
Details (4)
- 2.9.14+dfsg-1.3~deb12u6 · amd64 · bookworm
  Fixed · Fixed: 2.9.10+dfsg-2
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u6 · arm64 · bookworm
  Fixed · Fixed: 2.9.10+dfsg-2
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u4 · amd64 · bookworm-security
  Fixed · Fixed: 2.9.10+dfsg-2
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u4 · arm64 · bookworm-security
  Fixed · Fixed: 2.9.10+dfsg-2
  dsa · libxml2 · debian · bookworm
[python3-libxml2]Unknown
Source package: [libxml2]
Details (4)
- 2.9.14+dfsg-1.3~deb12u6 · amd64 · bookworm
  Fixed · Fixed: 2.9.10+dfsg-2
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u6 · arm64 · bookworm
  Fixed · Fixed: 2.9.10+dfsg-2
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u4 · amd64 · bookworm-security
  Fixed · Fixed: 2.9.10+dfsg-2
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u4 · arm64 · bookworm-security
  Fixed · Fixed: 2.9.10+dfsg-2
  dsa · libxml2 · debian · bookworm

Observed: Oct 23, 2026, 5:43:37 PM UTC

References

[CERT-Bund public advisories] · [CISA cybersecurity advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]