Description
The xz_decomp function in xzlib.c in libxml2 2.9.1 does not properly detect compression errors, which allows context-dependent attackers to cause a denial of service (process hang) via crafted XML data.
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 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | libxml2 | 2.9.1+dfsg1-3ubuntu4.5 | USN-2812-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | libxml2 +3 | 2.9.1-6.el7.4 | RHSA-2020:1190 |
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 |
Show 2 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 |
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.amzn2.4.1 | ALAS2-2020-1466 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | libxml2 +3 | 2.9.1-6.0.1.el7.4 | ELSA-2020-1190 |
Advisories 15
- RHSA-2020:1190 Red Hat Security Advisory: libxml2 security update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- USN-2812-1 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
- 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
- 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-2025-0617 libxml2: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Mar 20, 2025
- WID-SEC-2023-1614 Tenable Security Nessus Network Monitor: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 25, 2023
- ALAS2-2020-1466 Important: libxml2 security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jul 21, 2020
- ELSA-2020-1190 Moderate: libxml2 security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Apr 6, 2020
References
- APPLE-SA-2016-03-21-5 vendor-advisory
- openSUSE-SU-2016:0106 vendor-advisory
- https://support.apple.com/HT206167
- https://support.apple.com/HT206168
- DSA-3430 vendor-advisory
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05111017
- [oss-security] 20151102 CVE request: DoS in libxml2 if xz is enabled mailing-list
- APPLE-SA-2016-03-21-1 vendor-advisory
- http://xmlsoft.org/news.html
- FEDORA-2016-a9ee80b01d vendor-advisory
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05158380
- RHSA-2016:1089 vendor-advisory
- APPLE-SA-2016-03-21-2 vendor-advisory
- 1034243 vdb-entry
- USN-2812-1 vendor-advisory
- [oss-security] 20151102 Re: CVE request: DoS in libxml2 if xz is enabled mailing-list
- FEDORA-2016-189a7bf68c vendor-advisory
- [oss-security] 20151103 Re: CVE request: DoS in libxml2 if xz is enabled mailing-list
- GLSA-201701-37 vendor-advisory
- 77390 vdb-entry
- openSUSE-SU-2015:2372 vendor-advisory
- APPLE-SA-2016-03-21-3 vendor-advisory
- https://support.apple.com/HT206169
- https://support.apple.com/HT206166
- https://bugzilla.gnome.org/show_bug.cgi?id=757466