Description
build_model in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer 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 | 2.4.3-1 | — |
| Debian 13 | expat | 2.4.3-1 | — |
| Debian 12 | expat | 2.4.3-1 | — |
| Debian 12 | libxmltok | No fix yet | — |
| Debian 11 | expat | 2.2.10-2+deb11u1 | DSA-5073-1 |
| Debian 10 | expat | 2.2.6-2+deb10u2 | DSA-5073-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 9 | expat | 2.2.0-2+deb9u4 | DLA-2904-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | tdom +5 | No fix yet | — |
| Ubuntu 26.04 LTS | tdom +4 | No fix yet | — |
| Ubuntu 25.10 | tdom +5 | No fix yet | — |
| Ubuntu 24.04 LTS | tdom +3 | No fix yet | — |
| Ubuntu 22.04 LTS | expat | 2.4.3-1 | — |
| Ubuntu 22.04 LTS | firefox | 1:1snap1-0ubuntu1 | — |
| Ubuntu 22.04 LTS | tdom +3 | No fix yet | — |
| Ubuntu 22.04 LTS | thunderbird | 1:91.11.0+build2-0ubuntu0.22.04.1 | — |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | expat | 2.2.9-1ubuntu0.2 | USN-5288-1 |
| Ubuntu 20.04 LTS | firefox | 98.0+build3-0ubuntu0.20.04.2 | — |
| Ubuntu 20.04 LTS | tdom +3 | No fix yet | — |
| Ubuntu 20.04 LTS | thunderbird | 1:91.11.0+build2-0ubuntu0.20.04.1 | — |
| Ubuntu 18.04 LTS | expat | 2.2.5-3ubuntu0.4 | USN-5288-1 |
| Ubuntu 18.04 LTS | firefox | 98.0+build3-0ubuntu0.18.04.2 | — |
| Ubuntu 18.04 LTS | tdom +4 | No fix yet | — |
| Ubuntu 16.04 LTS | tdom +4 | No fix yet | — |
| 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 | expat | 2.1.0-7ubuntu0.16.04.5+esm2 | USN-5288-1 |
| Ubuntu Pro 16.04 LTS | libxmltok | 1.2-3ubuntu0.16.04.1~esm2 | USN-5455-1 |
| Ubuntu Pro 16.04 LTS | vtk +7 | No fix yet | — |
| Ubuntu Pro 14.04 LTS | expat | 2.1.0-4ubuntu1.4+esm4 | USN-5288-1 |
| Ubuntu Pro 14.04 LTS | vtk +3 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | expat +1 | 2.2.10-12.el9_0 | RHBA-2022:4046 |
| RHEL 8 | expat +1 | 2.2.5-4.el8_5.3 | RHSA-2022:0951 |
| RHEL 8 | firefox | 91.7.0-3.el8_5 | RHSA-2022:0818 |
| RHEL 8 | thunderbird | 91.7.0-2.el8_5 | RHSA-2022:0845 |
| RHEL 8 | xmlrpc-c +4 | 1.51.0-8.el8 | RHSA-2022:7692 |
| RHEL 7 | expat +2 | 2.1.0-14.el7_9 | RHSA-2022:1069 |
| RHEL 7 | firefox | 91.7.0-3.el7_9 | RHSA-2022:0824 |
| RHEL 7 | thunderbird | 91.7.0-2.el7_9 | RHSA-2022:0850 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8.4 EUS Long Life | expat | 2.2.10-1.el8_4 | RHSA-2025:22785 |
| RHEL 8.4 AUS | expat | 2.2.10-1.el8_4 | RHSA-2025:22785 |
| RHEL 8.2 AUS | expat | 2.2.10-1.el8_2 | RHSA-2025:22871 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | expat +1 | 2.2.5-8.el8_6.2 | ALSA-2022:0951 |
| AlmaLinux 8 | xmlrpc-c +4 | 1.51.0-8.el8 | ALSA-2022:7692 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | expat | 2.2.5-4.el8_5.3 | RLSA-2022:0951 |
| Rocky Linux 8 | xmlrpc-c | 1.51.0-8.el8 | RLSA-2022:7692 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | expat | 2.2.5-3.9.1 | SUSE-SU-2022:0178-1 |
| SLES 15 SP2 | expat | 2.2.5-3.9.1 | SUSE-SU-2022:0178-1 |
| SLES 15 SP1 | expat | 2.2.5-3.9.1 | SUSE-SU-2022:0178-1 |
| SLES 15 | expat | 2.2.5-3.9.1 | SUSE-SU-2022:0178-1 |
| SLES 12 SP5 | expat | 2.1.0-21.12.1 | SUSE-SU-2022:0179-1 |
Show 26 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP4 | expat | 2.1.0-21.12.1 | SUSE-SU-2022:0179-1 |
| SLES 12 SP3 | expat | 2.1.0-21.12.1 | SUSE-SU-2022:0179-1 |
| SLES 12 SP2 | expat | 2.1.0-21.12.1 | SUSE-SU-2022:0179-1 |
| SLES 11 SP4 | expat | 2.0.1-88.42.12.1 | SUSE-SU-2022:14878-1 |
| SLES for SAP 15 SP2 | expat | 2.2.5-3.9.1 | SUSE-SU-2022:0178-1 |
| SLES for SAP 15 SP1 | expat | 2.2.5-3.9.1 | SUSE-SU-2022:0178-1 |
| SLES for SAP 15 | expat | 2.2.5-3.9.1 | SUSE-SU-2022:0178-1 |
| SLES for SAP 12 SP5 | expat | 2.1.0-21.12.1 | SUSE-SU-2022:0179-1 |
| SLES for SAP 12 SP4 | expat | 2.1.0-21.12.1 | SUSE-SU-2022:0179-1 |
| SLES for SAP 12 SP3 | expat | 2.1.0-21.12.1 | SUSE-SU-2022:0179-1 |
| SLE Micro 5.1 | expat | 2.2.5-3.9.1 | SUSE-SU-2022:0178-1 |
| SLE Micro 5.0 | expat | 2.2.5-3.9.1 | SUSE-SU-2022:0178-1 |
| SLE HPC 15 SP2 | expat | 2.2.5-3.9.1 | SUSE-SU-2022:0178-1 |
| SLE HPC 15 SP1 | expat | 2.2.5-3.9.1 | SUSE-SU-2022:0178-1 |
| SLE HPC 15 | expat | 2.2.5-3.9.1 | SUSE-SU-2022:0178-1 |
| SUSE OpenStack Cloud Crowbar 9 | expat | 2.1.0-21.12.1 | SUSE-SU-2022:0179-1 |
| SUSE OpenStack Cloud Crowbar 8 | expat | 2.1.0-21.12.1 | SUSE-SU-2022:0179-1 |
| SUSE OpenStack Cloud 9 | expat | 2.1.0-21.12.1 | SUSE-SU-2022:0179-1 |
| SUSE OpenStack Cloud 8 | expat | 2.1.0-21.12.1 | SUSE-SU-2022:0179-1 |
| SUSE Manager Server 4.1 | expat | 2.2.5-3.9.1 | SUSE-SU-2022:0178-1 |
| SUSE Manager Retail Branch Server 4.1 | expat | 2.2.5-3.9.1 | SUSE-SU-2022:0178-1 |
| SUSE Manager Proxy 4.1 | expat | 2.2.5-3.9.1 | SUSE-SU-2022:0178-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | expat | 2.0.1-88.42.12.1 | SUSE-SU-2022:14878-1 |
| SUSE HPE Helion OpenStack 8 | expat | 2.1.0-21.12.1 | SUSE-SU-2022:0179-1 |
| SUSE Enterprise Storage 7 | expat | 2.2.5-3.9.1 | SUSE-SU-2022:0178-1 |
| SUSE Enterprise Storage 6 | expat | 2.2.5-3.9.1 | SUSE-SU-2022:0178-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | expat | 2.4.3-1.1 | openSUSE-SU-2024:11762-1 |
| openSUSE Leap 15.3 | expat | 2.2.5-3.9.1 | openSUSE-SU-2022:0178-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | expat | 2.4.3-r0 | — |
| Alpine v3.23 | expat | 2.4.3-r0 | — |
| Alpine v3.22 | expat | 2.4.3-r0 | — |
| Alpine v3.21 | expat | 2.4.3-r0 | — |
| Alpine v3.20 | expat | 2.4.3-r0 | — |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | expat | 2.4.3-r0 | — |
| Alpine v3.18 | expat | 2.4.3-r0 | — |
| Alpine v3.17 | expat | 2.4.3-r0 | — |
| Alpine v3.16 | expat | 2.4.3-r0 | — |
| Alpine v3.15 | expat | 2.4.3-r0 | — |
| Alpine v3.14 | expat | 2.4.3-r0 | — |
| Alpine v3.13 | expat | 2.2.10-r2 | — |
| Alpine v3.12 | expat | 2.2.10-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | expat +2 | 2.5.0-1.amzn2023.0.2 | ALAS2023-2023-058 |
| Amazon Linux 2 | expat +2 | 2.1.0-14.amzn2.0.1 | ALAS2-2022-1809 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | expat | 2.4.3-1 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | expat +1 | 2.2.5-4.el8_5.3 | ELSA-2022-0951 |
| Oracle Linux 8 | xmlrpc-c +4 | 1.51.0-8.el8 | ELSA-2022-7692 |
| Oracle Linux 7 | expat +2 | 2.1.0-14.0.1.el7_9 | ELSA-2022-1069 |
Advisories 43
- WID-SEC-2026-4429 IBM Tivoli Monitoring: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 9, 2026
- ALSA-2022:0951 Important: expat security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2022:7692 Moderate: xmlrpc-c security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2025:22871 Red Hat Security Advisory: expat security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2025:22785 Red Hat Security Advisory: expat security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2022:7692 Red Hat Security Advisory: xmlrpc-c security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2022:1069 Red Hat Security Advisory: expat security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2022:0951 Red Hat Security Advisory: expat security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2022:0850 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2022:0845 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2022:0824 Red Hat Security Advisory: firefox security and bug fix update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2022:0818 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHBA-2022:4046 Red Hat Bug Fix Advisory: new packages: expat Red Hat Security Advisories (RHSA) · Oct 15, 2026
- SSA-398330 SSA-398330: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP >= V3.1.0 and < V3.1.5 Siemens ProductCERT · Oct 13, 2026
- WID-SEC-2022-0432 Xerox FreeFlow Print Server: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 11, 2026
- WID-SEC-2022-0302 Xerox FreeFlow Print Server: Mehrere Schwachstellen ermöglichen Ausführen von beliebigem Programmcode mit Administratorrechten BSI CERT-Bund (WID) · Oct 11, 2026
- USN-5288-1 expat vulnerabilities Ubuntu Security Notices (USN) · Jun 29, 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
- DSA-5073-1 expat - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2904-1 expat - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2022:7692 Moderate: xmlrpc-c security update Rocky Linux Security Advisories · Feb 5, 2026
- RLSA-2022:0951 Important: expat security update Rocky Linux Security Advisories · Feb 4, 2026
- openSUSE-SU-2022:0178-1 Security update for expat SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0179-1 Security update for expat SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:14878-1 Security update for expat SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11762-1 expat-2.4.3-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0178-1 Security update for expat SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2022-0246 expat: Mehrere Schwachstellen BSI CERT-Bund (WID) · Dec 8, 2025
- WID-SEC-2022-1335 Xerox FreeFlow Print Server: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 6, 2025
- ICSA-23-348-10 Siemens SIMATIC S7-1500 CISA ICS & IT advisories · Aug 12, 2025
- VDE-2022-005 PHOENIX CONTACT: Vulnerabilities in XML parser library Expat (libexpat) CERT@VDE · May 22, 2025
- VDE-2022-010 PHOENIX CONTACT: Multiple Linux component vulnerabilities fixed in latest AXC F x152 LTS release CERT@VDE · May 22, 2025
- WID-SEC-2024-1591 Juniper JUNOS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 11, 2024
- ICSA-22-167-17 Siemens OpenSSL Affecting Industrial Products CISA ICS & IT advisories · Jul 9, 2024
- SSA-484086 SSA-484086: Multiple Vulnerabilities in SINEMA Remote Connect Server before V3.1 Siemens ProductCERT · Jul 9, 2024
- WID-SEC-2023-2639 Hitachi Energy AFS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 12, 2023
- ICSA-23-278-01 Hitachi Energy AFS65x,AFF66x, AFS67x, and AFR67x Series Products CISA ICS & IT advisories · Oct 5, 2023
- ALAS2023-2023-058 Critical: expat security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Feb 22, 2023
- ELSA-2022-7692 Moderate: xmlrpc-c security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 15, 2022
- ALAS2-2022-1809 Moderate: expat security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jul 14, 2022
- ELSA-2022-1069 Important: expat security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Mar 28, 2022
- ELSA-2022-0951 Important: expat security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Mar 16, 2022