Description
Heap-based buffer overflow in the xmlParseXmlDecl function in parser.c in libxml2 before 2.9.3 allows context-dependent attackers to cause a denial of service via unspecified vectors related to extracting errors after an encoding conversion failure.
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 | 2.9.3+dfsg1-1 | — |
| Debian 13 | libxml2 | 2.9.3+dfsg1-1 | — |
| Debian 12 | libxml2 | 2.9.3+dfsg1-1 | — |
| Debian 8 | libxml2 | 2.9.1+dfsg1-5+deb8u1 | DSA-3430-1 |
| Debian 7 | libxml2 | 2.8.0+dfsg1-7+wheezy5 | DSA-3430-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 6.0 | libxml2 | 2.7.8.dfsg-2+squeeze16 | DLA-373-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | libxml2 | 2.9.1+dfsg1-3ubuntu4.6 | USN-2834-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | libxml2 +3 | 2.9.1-6.el7_2.2 | RHSA-2015:2550 |
| RHEL 6 | libxml2 +3 | 2.7.6-20.el6_7.1 | RHSA-2015:2549 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | libxml2 +1 | 2.9.1-13.1 | SUSE-SU-2016:0049-1 |
| SLES 12 | libxml2 +1 | 2.9.1-13.1 | SUSE-SU-2016:0049-1 |
| SLES 11 SP4 | libxml2 | 2.7.6-0.34.1 | SUSE-SU-2016:0030-1 |
| SLES 11 SP4 | libxml2-python | 2.7.6-0.34.4 | SUSE-SU-2016:0030-1 |
| SLES 11 SP3 | libxml2 | 2.7.6-0.34.1 | SUSE-SU-2016:0030-1 |
| SLES 11 SP3 | libxml2-python | 2.7.6-0.34.4 | SUSE-SU-2016:0030-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP1 | libxml2 +1 | 2.9.1-13.1 | SUSE-SU-2016:0049-1 |
| SLES for SAP 12 | libxml2 +1 | 2.9.1-13.1 | SUSE-SU-2016:0049-1 |
| SLES for SAP 11 SP4 | libxml2 | 2.7.6-0.34.1 | SUSE-SU-2016:0030-1 |
| SLES for SAP 11 SP4 | libxml2-python | 2.7.6-0.34.4 | SUSE-SU-2016:0030-1 |
| SLES for SAP 11 SP3 | libxml2 | 2.7.6-0.34.1 | SUSE-SU-2016:0030-1 |
| SLES for SAP 11 SP3 | libxml2-python | 2.7.6-0.34.4 | SUSE-SU-2016:0030-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | libxml2 | 2.9.4-1.22 | openSUSE-SU-2024:10192-1 |
| openSUSE Tumbleweed | ruby3.2-rubygem-nokogiri | 1.13.9-1.7 | openSUSE-SU-2024:13165-1 |
| openSUSE Tumbleweed | rubygem-nokogiri | 1.6.8.1-1.3 | openSUSE-SU-2026:10356-1, openSUSE-SU-2025:14697-1, openSUSE-SU-2024:14174-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | libxml2 +3 | 2.9.1-6.amzn2.3.2 | ALAS2-2019-1220 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | libxml2 +3 | 2.9.1-6.0.1.el7_2.2 | ELSA-2015-2550 |
Advisories 18
- RHSA-2015:2549 Red Hat Security Advisory: libxml2 security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2015:2550 Red Hat Security Advisory: libxml2 security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-2834-1 libxml2 vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 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-373-1 libxml2 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3430-1 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
- openSUSE-SU-2024:10192-1 libxml2-2-2.9.4-1.22 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10549-1 ruby2.2-rubygem-nokogiri-1.6.8.1-1.3 on GA media 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-2016:0030-1 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
- SUSE-SU-2016:0049-1 Security update for libxml2 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
- WID-SEC-2024-3389 libxml2: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 30, 2025
- WID-SEC-2023-1614 Tenable Security Nessus Network Monitor: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 25, 2023
- ALAS2-2019-1220 Moderate: libxml2 security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · May 30, 2019
- ELSA-2015-2550 Moderate: libxml2 security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Dec 7, 2015
References
- RHSA-2015:2550 vendor-advisory
- openSUSE-SU-2016:0106 vendor-advisory
- https://git.gnome.org/browse/libxml2/commit/?id=afd27c21f6b36e22682b7da20d726bce2dcb2f43
- DSA-3430 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1281879
- http://xmlsoft.org/news.html
- RHSA-2016:1089 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
- USN-2834-1 vendor-advisory
- 79548 vdb-entry
- 1034243 vdb-entry
- RHSA-2015:2549 vendor-advisory
- HPSBGN03537 vendor-advisory
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04944172
- GLSA-201701-37 vendor-advisory
- openSUSE-SU-2015:2372 vendor-advisory