Description
Expat allows context-dependent attackers to cause a denial of service (crash) or possibly execute arbitrary code via a malformed input document, which triggers a buffer overflow.
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 | expat | 2.1.1-2 | — |
| Debian 13 | expat | 2.1.1-2 | — |
| Debian 12 | expat | 2.1.1-2 | — |
| Debian 12 | libxmltok | No fix yet | — |
| Debian 8 | expat | 2.1.0-6+deb8u2 | DSA-3582-1 |
| Debian 7 | expat | 2.1.0-1+deb7u3 | DLA-483-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | coin3 +5 | No fix yet | — |
| Ubuntu 26.04 LTS | coin3 +4 | No fix yet | — |
| Ubuntu 25.10 | coin3 +5 | No fix yet | — |
| Ubuntu 24.04 LTS | cadaver +1 | No fix yet | — |
| Ubuntu 22.04 LTS | cadaver +1 | No fix yet | — |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | cadaver +1 | No fix yet | — |
| Ubuntu 18.04 LTS | vnc4 +2 | No fix yet | — |
| Ubuntu 16.04 LTS | cadaver +1 | No fix yet | — |
| Ubuntu 16.04 LTS | expat | 2.1.0-7ubuntu0.16.04.1 | USN-2983-1 |
| Ubuntu 16.04 LTS | firefox | 48.0+build2-0ubuntu0.16.04.1 | USN-3044-1 |
| Ubuntu 14.04 LTS | expat | 2.1.0-4ubuntu1.2 | USN-2983-1 |
| Ubuntu 14.04 LTS | firefox | 48.0+build2-0ubuntu0.14.04.1 | USN-3044-1 |
| Ubuntu Pro 26.04 LTS | swish-e | No fix yet | — |
| Ubuntu Pro 24.04 LTS | libxmltok | 1.2-4.1ubuntu2.24.0.4.1+esm2 | USN-7199-1 |
| Ubuntu Pro 24.04 LTS | swish-e +1 | No fix yet | — |
| Ubuntu Pro 22.04 LTS | libxmltok | 1.2-4ubuntu0.22.04.1~esm4 | USN-7199-1, USN-5455-1 |
| Ubuntu Pro 22.04 LTS | swish-e +1 | No fix yet | — |
| Ubuntu Pro 20.04 LTS | libxmltok | 1.2-4ubuntu0.20.04.1~esm4 | USN-7199-1, USN-5455-1 |
| Ubuntu Pro 20.04 LTS | swish-e +1 | No fix yet | — |
| Ubuntu Pro 18.04 LTS | coin3 +2 | No fix yet | — |
| Ubuntu Pro 18.04 LTS | libxmltok | 1.2-4ubuntu0.18.04.1~esm4 | USN-7199-1, USN-5455-1 |
| Ubuntu Pro 16.04 LTS | libxmltok | 1.2-3ubuntu0.16.04.1~esm2 | USN-5455-1 |
| Ubuntu Pro 16.04 LTS | vnc4 +6 | No fix yet | — |
| Ubuntu Pro 14.04 LTS | vnc4 +2 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | expat +2 | 2.1.0-10.el7_3 | RHSA-2016:2824 |
| RHEL 6 | expat +1 | 2.0.1-13.el6_8 | RHSA-2016:2824 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP6 | expat | 2.8.5-150400.3.40.1 | SUSE-SU-2026:4623-1 |
| SLES 15 SP5 | expat | 2.8.5-150400.3.40.1 | SUSE-SU-2026:4623-1 |
| SLES 15 SP4 | expat | 2.8.5-150400.3.40.1 | SUSE-SU-2026:4623-1 |
| SLES 12 SP5 | expat | 2.8.5-21.55.1 | SUSE-SU-2026:4615-1 |
| SLES 12 SP5 | python3 | 3.4.10-25.39.3 | SUSE-SU-2020:0497-1 |
| SLES 12 SP5 | python3-base | 3.4.10-25.39.2 | SUSE-SU-2020:0497-1 |
| SLES 12 SP4 | python3 | 3.4.10-25.39.3 | SUSE-SU-2020:0497-1 |
| SLES 12 SP4 | python3-base | 3.4.10-25.39.2 | SUSE-SU-2020:0497-1 |
Show 27 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | python3 | 3.4.10-25.39.3 | SUSE-SU-2020:0497-1 |
| SLES 12 SP3 | python3-base | 3.4.10-25.39.2 | SUSE-SU-2020:0497-1 |
| SLES 12 SP2 | python3 | 3.4.10-25.39.3 | SUSE-SU-2020:0497-1 |
| SLES 12 SP2 | python3-base | 3.4.10-25.39.2 | SUSE-SU-2020:0497-1 |
| SLES 12 SP1 | expat | 2.1.0-17.1 | SUSE-SU-2016:1508-1 |
| SLES 12 SP1 | python3 | 3.4.10-25.39.3 | SUSE-SU-2020:0497-1 |
| SLES 12 SP1 | python3-base | 3.4.10-25.39.2 | SUSE-SU-2020:0497-1 |
| SLES 12 | expat | 2.1.0-17.1 | SUSE-SU-2016:1508-1 |
| SLES 12 | python3 | 3.4.10-25.39.3 | SUSE-SU-2020:0497-1 |
| SLES 12 | python3-base | 3.4.10-25.39.2 | SUSE-SU-2020:0497-1 |
| SLES 11 SP4 | expat | 2.0.1-88.38.1 | SUSE-SU-2016:1512-1 |
| SUSE Studio Onsite 1.3 | expat | 2.0.1-88.38.1 | SUSE-SU-2016:1512-1 |
| SLES for SAP 15 SP6 | expat | 2.8.5-150400.3.40.1 | SUSE-SU-2026:4623-1 |
| SLES for SAP 15 SP5 | expat | 2.8.5-150400.3.40.1 | SUSE-SU-2026:4623-1 |
| SLES for SAP 15 SP4 | expat | 2.8.5-150400.3.40.1 | SUSE-SU-2026:4623-1 |
| SLES for SAP 12 SP5 | python3 | 3.4.10-25.39.3 | SUSE-SU-2020:0497-1 |
| SLES for SAP 12 SP5 | python3-base | 3.4.10-25.39.2 | SUSE-SU-2020:0497-1 |
| SLES for SAP 12 SP4 | python3 | 3.4.10-25.39.3 | SUSE-SU-2020:0497-1 |
| SLES for SAP 12 SP4 | python3-base | 3.4.10-25.39.2 | SUSE-SU-2020:0497-1 |
| SLES for SAP 12 SP3 | python3 | 3.4.10-25.39.3 | SUSE-SU-2020:0497-1 |
| SLES for SAP 12 SP3 | python3-base | 3.4.10-25.39.2 | SUSE-SU-2020:0497-1 |
| SLES for SAP 12 SP2 | python3 | 3.4.10-25.39.3 | SUSE-SU-2020:0497-1 |
| SLES for SAP 12 SP2 | python3-base | 3.4.10-25.39.2 | SUSE-SU-2020:0497-1 |
| SLES for SAP 12 SP1 | expat | 2.1.0-17.1 | SUSE-SU-2016:1508-1 |
| SLES for SAP 12 SP1 | python3 | 3.4.10-25.39.3 | SUSE-SU-2020:0497-1 |
| SLES for SAP 12 SP1 | python3-base | 3.4.10-25.39.2 | SUSE-SU-2020:0497-1 |
| SLES for SAP 12 | expat | 2.1.0-17.1 | SUSE-SU-2016:1508-1 |
| SLES for SAP 11 SP4 | expat | 2.0.1-88.38.1 | SUSE-SU-2016:1512-1 |
| SLE Micro 6.0 | expat | 2.8.5-159998.1.1 | SUSE-SU-2026:24323-1 |
| SLE Micro 5.5 | expat | 2.8.5-150400.3.40.1 | SUSE-SU-2026:4623-1 |
| SLE Micro 5.4 | expat | 2.8.5-150400.3.40.1 | SUSE-SU-2026:4623-1 |
| SLE Micro 5.3 | expat | 2.8.5-150400.3.40.1 | SUSE-SU-2026:4623-1 |
| SLE HPC 15 SP5 | expat | 2.8.5-150400.3.40.1 | SUSE-SU-2026:4623-1 |
| SLE HPC 15 SP4 | expat | 2.8.5-150400.3.40.1 | SUSE-SU-2026:4623-1 |
| SUSE OpenStack Cloud Crowbar 8 | python3 | 3.4.10-25.39.3 | SUSE-SU-2020:0497-1 |
| SUSE OpenStack Cloud Crowbar 8 | python3-base | 3.4.10-25.39.2 | SUSE-SU-2020:0497-1 |
| SUSE OpenStack Cloud 8 | python3 | 3.4.10-25.39.3 | SUSE-SU-2020:0497-1 |
| SUSE OpenStack Cloud 8 | python3-base | 3.4.10-25.39.2 | SUSE-SU-2020:0497-1 |
| SUSE OpenStack Cloud 7 | python3 | 3.4.10-25.39.3 | SUSE-SU-2020:0497-1 |
| SUSE OpenStack Cloud 7 | python3-base | 3.4.10-25.39.2 | SUSE-SU-2020:0497-1 |
| SUSE HPE Helion OpenStack 8 | python3 | 3.4.10-25.39.3 | SUSE-SU-2020:0497-1 |
| SUSE HPE Helion OpenStack 8 | python3-base | 3.4.10-25.39.2 | SUSE-SU-2020:0497-1 |
| SUSE Enterprise Storage 5 | python3 | 3.4.10-25.39.3 | SUSE-SU-2020:0497-1 |
| SUSE Enterprise Storage 5 | python3-base | 3.4.10-25.39.2 | SUSE-SU-2020:0497-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 50.1.0-1.1 | openSUSE-SU-2024:10071-1 |
| openSUSE Tumbleweed | expat | 2.2.0-3.1 | openSUSE-SU-2024:10077-1 |
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.4 | expat | 2.1.1-r1 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | expat +2 | 2.1.0-10.el7_3 | ELSA-2016-2824 |
Advisories 18
- SUSE-SU-2026:24323-1 Security update for expat SUSE / openSUSE Security Updates · Oct 27, 2026
- WID-SEC-2025-0045 expat: Schwachstelle ermöglicht Codeausführung BSI CERT-Bund (WID) · Oct 25, 2026
- SUSE-SU-2026:4623-1 Security update for expat SUSE / openSUSE Security Updates · Oct 13, 2026
- SUSE-SU-2026:4615-1 Security update for expat SUSE / openSUSE Security Updates · Oct 13, 2026
- RHSA-2016:2824 Red Hat Security Advisory: expat security update Red Hat Security Advisories (RHSA) · Sep 21, 2026
- USN-5455-1 libxmltok vulnerabilities Ubuntu Security Notices (USN) · Jun 25, 2026
- USN-7199-1 libxmltok vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- USN-3044-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- USN-2983-1 expat vulnerability Ubuntu Security Notices (USN) · Apr 27, 2026
- DLA-483-1 expat - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3582-1 expat - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2016:1512-1 Security update for expat SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:1508-1 Security update for expat SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10077-1 expat-2.2.0-3.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:14572-1 firefox-esr-128.5.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0497-1 Security update for python3 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10071-1 MozillaFirefox-50.1.0-1.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
- ELSA-2016-2824 Moderate: expat security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Nov 28, 2016
References
- RHSA-2016:2824 vendor-advisory
- https://www.tenable.com/security/tns-2016-20
- 1037705 vdb-entry
- 1036415 vdb-entry
- http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
- USN-2983-1 vendor-advisory
- openSUSE-SU-2016:1523 vendor-advisory
- http://support.eset.com/ca6333/
- 90729 vdb-entry
- USN-3044-1 vendor-advisory
- [oss-security] 20160517 CVE-2016-0718: Expat XML Parser Crashes on Malformed Input mailing-list
- http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html
- APPLE-SA-2016-07-18-1 vendor-advisory
- SUSE-SU-2016:1508 vendor-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1236923
- 20170227 CVE-2016-9892 - Remote Code Execution as Root via ESET Endpoint Antivirus 6 mailing-list
- GLSA-201701-21 vendor-advisory
- https://source.android.com/security/bulletin/2016-11-01.html
- DSA-3582 vendor-advisory
- SUSE-SU-2016:1512 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1296102
- http://www.mozilla.org/security/announce/2016/mfsa2016-68.html
- openSUSE-SU-2016:1964 vendor-advisory
- RHSA-2018:2486 vendor-advisory
- 1036348 vdb-entry
- https://support.apple.com/HT206903
- openSUSE-SU-2016:1441 vendor-advisory
- openSUSE-SU-2016:2026 vendor-advisory
- http://packetstormsecurity.com/files/141350/ESET-Endpoint-Antivirus-6-Remote-Code-Execution.html
- https://kc.mcafee.com/corporate/index?page=content&id=SB10365