Description
libexpat before 2.4.9 has a use-after-free in the doContent function in xmlparse.c.
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 | 2.4.8-2 | — |
| Debian 13 | expat | 2.4.8-2 | — |
| Debian 12 | expat | 2.4.8-2 | — |
| Debian 12 | libxmltok | No fix yet | — |
| Debian 11 | expat | 2.2.10-2+deb11u4 | DSA-5236-1 |
| Debian 10 | expat | 2.2.6-2+deb10u5 | DLA-3119-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | tdom +7 | No fix yet | — |
| Ubuntu 26.04 LTS | tdom +6 | No fix yet | — |
| Ubuntu 25.10 | tdom +7 | No fix yet | — |
| Ubuntu 24.04 LTS | tdom +5 | No fix yet | — |
| Ubuntu 22.04 LTS | expat | 2.4.7-1ubuntu0.1 | USN-5638-2 |
| Ubuntu 22.04 LTS | tdom +5 | No fix yet | — |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | expat | 2.2.9-1ubuntu0.5 | USN-5638-2 |
| Ubuntu 20.04 LTS | firefox | 107.0+build2-0ubuntu0.20.04.1 | USN-5726-1 |
| Ubuntu 20.04 LTS | tdom +4 | No fix yet | — |
| Ubuntu 18.04 LTS | expat | 2.2.5-3ubuntu0.8 | USN-5638-2 |
| Ubuntu 18.04 LTS | firefox | 107.0+build2-0ubuntu0.18.04.1 | USN-5726-1 |
| Ubuntu 18.04 LTS | tdom +5 | No fix yet | — |
| Ubuntu 16.04 LTS | tdom +5 | No fix yet | — |
| Ubuntu Pro 26.04 LTS | swish-e | No fix yet | — |
| Ubuntu Pro 24.04 LTS | swish-e +1 | No fix yet | — |
| Ubuntu Pro 22.04 LTS | swish-e +1 | No fix yet | — |
| Ubuntu Pro 20.04 LTS | swish-e +1 | No fix yet | — |
| Ubuntu Pro 18.04 LTS | coin3 +2 | No fix yet | — |
| Ubuntu Pro 16.04 LTS | expat | 2.1.0-7ubuntu0.16.04.5+esm6 | USN-5638-1 |
| Ubuntu Pro 16.04 LTS | vtk +7 | No fix yet | — |
| Ubuntu Pro 14.04 LTS | expat | 2.1.0-4ubuntu1.4+esm7 | USN-5638-4 |
| 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_0.3 | RHSA-2022:6838 |
| RHEL 9 | firefox | 102.3.0-7.el9_0 | RHSA-2022:7020 |
| RHEL 9 | thunderbird | 102.3.0-4.el9_0 | RHSA-2022:7026 |
| RHEL 8 | expat +1 | 2.2.5-8.el8_6.3 | RHSA-2022:6878 |
| RHEL 8 | firefox | 102.3.0-7.el8_6 | RHSA-2022:7024 |
| RHEL 8 | mingw-expat +2 | 2.4.8-2.el8 | RHSA-2023:3068 |
| RHEL 8 | thunderbird | 102.3.0-4.el8_6 | RHSA-2022:7023 |
| RHEL 7 | expat +2 | 2.1.0-15.el7_9 | RHSA-2022:6834 |
| RHEL 7 | firefox | 102.3.0-7.el7_9 | RHSA-2022:6997 |
| RHEL 7 | thunderbird | 102.3.0-4.el7_9 | RHSA-2022:6998 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhev Hypervisor 4 | redhat-virtualization-host +1 | 4.5.3-202211170828_8.6 | RHSA-2022:8598 |
| RHEL 8.4 EUS | expat +1 | 2.2.5-4.el8_4.4 | RHSA-2022:6831 |
| RHEL 8.4 EUS | firefox | 102.3.0-7.el8_4 | RHSA-2022:7025 |
| RHEL 8.4 EUS | thunderbird | 102.3.0-4.el8_4 | RHSA-2022:6995 |
| RHEL 8.2 EUS | expat +1 | 2.2.5-3.el8_2.3 | RHSA-2022:6832 |
| RHEL 8.2 EUS | firefox | 102.3.0-7.el8_2 | RHSA-2022:7022 |
| RHEL 8.2 EUS | thunderbird | 102.3.0-4.el8_2 | RHSA-2022:6996 |
| RHEL 8.1 E4S | expat +1 | 2.2.5-3.el8_1.2 | RHSA-2022:6833 |
| RHEL 8.1 E4S | firefox | 102.3.0-7.el8_1 | RHSA-2022:7019 |
| RHEL 8.1 E4S | thunderbird | 102.3.0-4.el8_1 | RHSA-2022:7021 |
| RHEL 6 ELS | compat-expat1 | 1.95.8-9.el6_10 | RHSA-2022:6967 |
| RHEL 6 ELS | expat +1 | 2.0.1-15.el6_10 | RHSA-2022:6921 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | expat +1 | 2.2.10-12.el9_0.3 | ALSA-2022:6838 |
| AlmaLinux 9 | firefox | 102.3.0-7.el9_0.alma | ALSA-2022:7020 |
| AlmaLinux 9 | thunderbird | 102.3.0-4.el9_0.alma.plus | ALSA-2022:7026 |
| AlmaLinux 8 | expat +1 | 2.2.5-8.el8_6.3 | ALSA-2022:6878 |
| AlmaLinux 8 | firefox | 102.3.0-7.el8_6.alma | ALSA-2022:7024 |
| AlmaLinux 8 | mingw32-expat +1 | 2.4.8-2.el8 | ALSA-2023:3068 |
| AlmaLinux 8 | thunderbird | 102.3.0-4.el8_6.alma | ALSA-2022:7023 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 9 | expat | 2.2.10-12.el9_0.3 | RLSA-2022:6838 |
| Rocky Linux 8 | expat | 2.2.5-8.el8_6.3 | RLSA-2022:6878 |
| Rocky Linux 8 | firefox | 102.3.0-7.el8_6 | RLSA-2022:7024 |
| Rocky Linux 8 | mingw-expat | 2.4.8-2.el8 | RLSA-2023:3068 |
| Rocky Linux 8 | thunderbird | 102.3.0-4.el8_6 | RLSA-2022:7023 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP4 | expat | 2.4.4-150400.3.9.1 | SUSE-SU-2022:3489-1 |
| SLES 15 SP3 | expat | 2.2.5-150000.3.22.1 | SUSE-SU-2022:3597-1 |
| SLES 15 SP2 | expat | 2.2.5-150000.3.22.1 | SUSE-SU-2022:3597-1 |
| SLES 15 SP1 | expat | 2.2.5-150000.3.22.1 | SUSE-SU-2022:3597-1 |
| SLES 15 | expat | 2.2.5-150000.3.22.1 | SUSE-SU-2022:3597-1 |
Show 22 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | expat | 2.1.0-21.25.1 | SUSE-SU-2022:3466-1 |
| SLES 12 SP4 | expat | 2.1.0-21.25.1 | SUSE-SU-2022:3466-1 |
| SLES 12 SP3 | expat | 2.1.0-21.25.1 | SUSE-SU-2022:3466-1 |
| SLES 12 SP2 | expat | 2.1.0-21.25.1 | SUSE-SU-2022:3466-1 |
| SLES for SAP 15 SP2 | expat | 2.2.5-150000.3.22.1 | SUSE-SU-2022:3597-1 |
| SLES for SAP 15 SP1 | expat | 2.2.5-150000.3.22.1 | SUSE-SU-2022:3597-1 |
| SLES for SAP 15 | expat | 2.2.5-150000.3.22.1 | SUSE-SU-2022:3597-1 |
| SLES for SAP 12 SP5 | expat | 2.1.0-21.25.1 | SUSE-SU-2022:3466-1 |
| SLES for SAP 12 SP4 | expat | 2.1.0-21.25.1 | SUSE-SU-2022:3466-1 |
| SLE Micro 5.3 | expat | 2.4.4-150400.3.9.1 | SUSE-SU-2022:3489-1 |
| SLE Micro 5.2 | expat | 2.2.5-150000.3.22.1 | SUSE-SU-2022:3597-1 |
| SLE Micro 5.1 | expat | 2.2.5-150000.3.22.1 | SUSE-SU-2022:3597-1 |
| SLE HPC 15 SP2 | expat | 2.2.5-150000.3.22.1 | SUSE-SU-2022:3597-1 |
| SLE HPC 15 SP1 | expat | 2.2.5-150000.3.22.1 | SUSE-SU-2022:3597-1 |
| SLE HPC 15 | expat | 2.2.5-150000.3.22.1 | SUSE-SU-2022:3597-1 |
| SUSE OpenStack Cloud Crowbar 9 | expat | 2.1.0-21.25.1 | SUSE-SU-2022:3466-1 |
| SUSE OpenStack Cloud 9 | expat | 2.1.0-21.25.1 | SUSE-SU-2022:3466-1 |
| SUSE Manager Server 4.1 | expat | 2.2.5-150000.3.22.1 | SUSE-SU-2022:3597-1 |
| SUSE Manager Retail Branch Server 4.1 | expat | 2.2.5-150000.3.22.1 | SUSE-SU-2022:3597-1 |
| SUSE Manager Proxy 4.1 | expat | 2.2.5-150000.3.22.1 | SUSE-SU-2022:3597-1 |
| SUSE Enterprise Storage 7 | expat | 2.2.5-150000.3.22.1 | SUSE-SU-2022:3597-1 |
| SUSE Enterprise Storage 6 | expat | 2.2.5-150000.3.22.1 | SUSE-SU-2022:3597-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 107.0-1.1 | openSUSE-SU-2024:12518-1 |
| openSUSE Tumbleweed | expat | 2.4.9-1.1 | openSUSE-SU-2024:12359-1 |
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
| openSUSE Leap 15.4 | expat | 2.4.4-150400.3.9.1 | SUSE-SU-2022:3489-1 |
| openSUSE Leap 15.3 | expat | 2.2.5-150000.3.22.1 | SUSE-SU-2022:3597-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap Micro 5.2 | expat | 2.2.5-150000.3.22.1 | SUSE-SU-2022:3597-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | expat | 2.4.9-r0 | — |
| Alpine v3.23 | expat | 2.4.9-r0 | — |
| Alpine v3.22 | expat | 2.4.9-r0 | — |
| Alpine v3.21 | expat | 2.4.9-r0 | — |
| Alpine v3.20 | expat | 2.4.9-r0 | — |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | expat | 2.4.9-r0 | — |
| Alpine v3.18 | expat | 2.4.9-r0 | — |
| Alpine v3.17 | expat | 2.4.9-r0 | — |
| Alpine v3.16 | expat | 2.4.9-r0 | — |
| Alpine v3.15 | expat | 2.4.9-r0 | — |
| Alpine v3.14 | expat | 2.4.9-r0 | — |
| Alpine v3.13 | expat | 2.2.10-r7 | — |
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 | 2.1.0-15.amzn2.0.1 | ALAS2-2022-1877 |
| Amazon Linux 2 | thunderbird | 102.4.0-1.amzn2.0.1 | ALAS2-2022-1900 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | expat | 2.4.8-2 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | expat +1 | 2.2.10-12.el9_0.3 | ELSA-2022-6838 |
| Oracle Linux 9 | firefox | 102.3.0-7.0.1.el9_0 | ELSA-2022-7020 |
| Oracle Linux 9 | thunderbird | 102.3.0-4.0.1.el9_0 | ELSA-2022-7026 |
| Oracle Linux 8 | expat +1 | 2.2.5-8.0.1.el8_6.3 | ELSA-2022-6878 |
| Oracle Linux 8 | firefox | 102.3.0-7.0.1.el8_6 | ELSA-2022-7024 |
| Oracle Linux 8 | thunderbird | 102.3.0-4.0.1.el8_6 | ELSA-2022-7023 |
| Oracle Linux 7 | expat +2 | 2.1.0-15.0.1.el7_9 | ELSA-2022-6834 |
| Oracle Linux 7 | firefox | 102.3.0-7.0.1.el7_9 | ELSA-2022-6997 |
| Oracle Linux 7 | thunderbird | 102.3.0-4.0.1.el7_9 | ELSA-2022-6998 |
Advisories 50
- ALSA-2022:7026 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2022:6838 Important: expat security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2022:7020 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2023:3068 Important: mingw-expat security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2022:7023 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2022:7024 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2022:6878 Important: expat security update AlmaLinux Security Advisories · Oct 29, 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
- RHSA-2023:3068 Red Hat Security Advisory: mingw-expat security update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2022:8598 Red Hat Security Advisory: Red Hat Virtualization Host security update [ovirt-4.5.3-1] Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2022:7026 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2022:7024 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2022:7025 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2022:7022 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2022:7023 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2022:7021 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2022:7020 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2022:7019 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2022:6997 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2022:6998 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2022:6996 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2022:6995 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2022:6921 Red Hat Security Advisory: expat security update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2022:6967 Red Hat Security Advisory: compat-expat1 security update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2022:6878 Red Hat Security Advisory: expat security update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2022:6834 Red Hat Security Advisory: expat security update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2022:6838 Red Hat Security Advisory: expat security update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2022:6832 Red Hat Security Advisory: expat security update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2022:6833 Red Hat Security Advisory: expat security update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2022:6831 Red Hat Security Advisory: expat security update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- WID-SEC-2024-0794 Dell ECS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 11, 2026
- USN-5638-4 expat vulnerabilities Ubuntu Security Notices (USN) · Jun 29, 2026
- USN-5638-1 expat vulnerability Ubuntu Security Notices (USN) · Jun 25, 2026
- USN-5726-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- USN-5638-2 expat vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DSA-5236-1 expat - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3119-1 expat - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2022:7024 Important: firefox security update Rocky Linux Security Advisories · Feb 5, 2026
- RLSA-2022:7023 Important: thunderbird security update Rocky Linux Security Advisories · Feb 5, 2026
- RLSA-2022:6838 Important: expat security update Rocky Linux Security Advisories · Feb 5, 2026
- RLSA-2022:6878 Important: expat security update Rocky Linux Security Advisories · Feb 4, 2026
- openSUSE-SU-2024:12359-1 expat-2.4.9-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:12518-1 MozillaFirefox-107.0-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:3466-1 Security update for expat SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:3489-1 Security update for expat SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:3597-1 Security update for expat 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
- WID-SEC-2022-1504 expat: Schwachstelle ermöglicht Codeausführung BSI CERT-Bund (WID) · Dec 28, 2025
- RLSA-2023:3068 Important: mingw-expat security update Rocky Linux Security Advisories · Dec 27, 2025
- ICSA-23-348-10 Siemens SIMATIC S7-1500 CISA ICS & IT advisories · Aug 12, 2025
References
- https://github.com/libexpat/libexpat/pull/629
- https://github.com/libexpat/libexpat/pull/640
- DSA-5236 vendor-advisory
- [debian-lts-announce] 20220925 [SECURITY] [DLA 3119-1] expat security update mailing-list
- GLSA-202209-24 vendor-advisory
- FEDORA-2022-15ec504440 vendor-advisory
- FEDORA-2022-c68d90efc3 vendor-advisory
- https://security.netapp.com/advisory/ntap-20221028-0008/
- FEDORA-2022-d93b3bd8b9 vendor-advisory
- FEDORA-2022-c22feb71ba vendor-advisory
- FEDORA-2022-dcb1d7bcb1 vendor-advisory
- GLSA-202211-06 vendor-advisory