CVE-2021-46143
expat: In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integeroverflow exists for m_groupSize.
CVE-2021-46143 is fixed in 19 products on 1 platform, first by libxmltok1t64 1.2-4.1ubuntu3.1, released September 4, 2019. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
9.8
Medium
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0447
91st percentile
In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integeroverflow exists for m_groupSize.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| expat · Debian 12.15 (bookworm) | 2.4.3-1 | DEBIAN-CVE-2021-46143 | Jan 6, 2022 |
| expat · Debian 13.5 (trixie) | 2.4.3-1 | DEBIAN-CVE-2021-46143 | Jan 6, 2022 |
| expat · Debian 14 | 2.4.3-1 | DEBIAN-CVE-2021-46143 | Jan 6, 2022 |
| expat · RHEL 8 | 0:2.2.5-4.el8_5.3 | RHSA-2022:0951 | Mar 16, 2022 |
| expat · RHEL 9 | 0:2.2.10-12.el9_0 | RHBA-2022:4046 | May 17, 2022 |
| expat · Ubuntu 18.04.6 LTS (bionic) | 2.2.5-3ubuntu0.4 | expat 2.2.5-3ubuntu0.4 | Feb 14, 2022 |
| expat · Ubuntu 20.04 LTS (focal) | 2.2.9-1ubuntu0.2 | expat 2.2.9-1ubuntu0.2 | Feb 14, 2022 |
| expat · Ubuntu 22.04.1 LTS (jammy) | 2.4.3-1 | expat 2.4.3-1 | Jan 10, 2022 |
| expat · Ubuntu 24.10 (oracular) | 2.4.3-1 | expat 2.4.3-1 | Jan 16, 2026 |
| expat · Ubuntu 25.04 (plucky) | 2.4.3-1 | expat 2.4.3-1 | Jan 16, 2026 |
| expat · almalinux 8 | 2.2.5-8.el8_6.2 | ALSA-2022:0951 | Mar 16, 2022 |
| expat · amzn 2023 | 2.5.0-1.amzn2023.0.2 | ALAS2023-2023-058 | Feb 17, 2023 |
| expat · ol 8 | 0:2.2.5-4.el8_5.3 | ELSA-2022-0951 | Mar 16, 2022 |
| expat · rocky 8 | 0:2.2.5-4.el8_5.3 | RLSA-2022:0951 | Mar 16, 2022 |
| expat-debuginfo · amzn 2023 | 2.5.0-1.amzn2023.0.2 | ALAS2023-2023-058 | Feb 17, 2023 |
| expat-debugsource · amzn 2023 | 2.5.0-1.amzn2023.0.2 | ALAS2023-2023-058 | Feb 17, 2023 |
| expat-devel · RHEL 8 | 0:2.2.5-4.el8_5.3 | RHSA-2022:0951 | Mar 16, 2022 |
| expat-devel · RHEL 9 | 0:2.2.10-12.el9_0 | RHBA-2022:4046 | May 17, 2022 |
| expat-devel · almalinux 8 | 2.2.5-8.el8_6.2 | ALSA-2022:0951 | Mar 16, 2022 |
| expat-devel · amzn 2023 | 2.5.0-1.amzn2023.0.2 | ALAS2023-2023-058 | Feb 17, 2023 |
| expat-devel · ol 8 | 0:2.2.5-4.el8_5.3 | ELSA-2022-0951 | Mar 16, 2022 |
| expat-static · amzn 2023 | 2.5.0-1.amzn2023.0.2 | ALAS2023-2023-058 | Feb 17, 2023 |
| firefox · Ubuntu 18.04.6 LTS (bionic) | 98.0+build3-0ubuntu0.18.04.2 | firefox 98.0+build3-0ubuntu0.18.04.2 | Mar 8, 2022 |
| firefox · Ubuntu 20.04 LTS (focal) | 98.0+build3-0ubuntu0.20.04.2 | firefox 98.0+build3-0ubuntu0.20.04.2 | Mar 8, 2022 |
| firefox · Ubuntu 22.04.1 LTS (jammy) | 1:1snap1-0ubuntu1 | firefox 1:1snap1-0ubuntu1 | Apr 6, 2022 |
| firefox · Ubuntu 24.10 (oracular) | 1:1snap1-0ubuntu1 | firefox 1:1snap1-0ubuntu1 | Feb 15, 2022 |
| firefox · Ubuntu 25.04 (plucky) | 1:1snap1-0ubuntu1 | firefox 1:1snap1-0ubuntu1 | Feb 15, 2022 |
| firefox-geckodriver · Ubuntu 18.04.6 LTS (bionic) | 98.0+build3-0ubuntu0.18.04.2 | firefox-geckodriver 98.0+build3-0ubuntu0.18.04.2 | Mar 8, 2022 |
| firefox-geckodriver · Ubuntu 20.04 LTS (focal) | 98.0+build3-0ubuntu0.20.04.2 | firefox-geckodriver 98.0+build3-0ubuntu0.20.04.2 | Mar 8, 2022 |
| firefox-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 98.0+build3-0ubuntu0.18.04.2 | firefox-mozsymbols 98.0+build3-0ubuntu0.18.04.2 | Mar 8, 2022 |
| firefox-mozsymbols · Ubuntu 20.04 LTS (focal) | 98.0+build3-0ubuntu0.20.04.2 | firefox-mozsymbols 98.0+build3-0ubuntu0.20.04.2 | Mar 8, 2022 |
| libexpat1 · Ubuntu 18.04.6 LTS (bionic) | 2.2.5-3ubuntu0.4 | libexpat1 2.2.5-3ubuntu0.4 | Feb 14, 2022 |
| libexpat1 · Ubuntu 20.04 LTS (focal) | 2.2.9-1ubuntu0.2 | libexpat1 2.2.9-1ubuntu0.2 | Feb 14, 2022 |
| libexpat1 · Ubuntu 22.04.1 LTS (jammy) | 2.4.3-1 | libexpat1 2.4.3-1 | Jan 10, 2022 |
| libexpat1 · Ubuntu 24.10 (oracular) | 2.4.3-1 | libexpat1 2.4.3-1 | Jan 16, 2026 |
| libexpat1 · Ubuntu 25.04 (plucky) | 2.4.3-1 | libexpat1 2.4.3-1 | Jan 16, 2026 |
| libxmltok1 · Ubuntu 18.04.6 LTS (bionic) | 1.2-4ubuntu0.18.04.1~esm4 | libxmltok1 1.2-4ubuntu0.18.04.1~esm4 | Jan 10, 2022 |
| libxmltok1 · Ubuntu 20.04 LTS (focal) | 1.2-4ubuntu0.20.04.1~esm4 | libxmltok1 1.2-4ubuntu0.20.04.1~esm4 | Jan 10, 2022 |
| libxmltok1 · Ubuntu 22.04.1 LTS (jammy) | 1.2-4ubuntu0.22.04.1~esm4 | libxmltok1 1.2-4ubuntu0.22.04.1~esm4 | Jan 10, 2022 |
| libxmltok1t64 · Ubuntu 24.04.5 LTS (noble) | 1.2-4.1ubuntu2.24.0.4.1+esm2 | libxmltok1t64 1.2-4.1ubuntu2.24.0.4.1+esm2 | Jan 10, 2022 |
| libxmltok1t64 · Ubuntu 24.10 (oracular) | 1.2-4.1ubuntu3.1 | libxmltok1t64 1.2-4.1ubuntu3.1 | Sep 4, 2019 |
| mame · Ubuntu 18.04.6 LTS (bionic) | 0.195+dfsg.1-2ubuntu0.1~esm1 | mame 0.195+dfsg.1-2ubuntu0.1~esm1 | Jun 23, 2022 |
| mame · Ubuntu 20.04 LTS (focal) | 0.220+dfsg.1-1ubuntu0.1~esm1 | mame 0.220+dfsg.1-1ubuntu0.1~esm1 | Jun 23, 2022 |
| mame · Ubuntu 22.04.1 LTS (jammy) | 0.242+dfsg.1-1ubuntu0.1~esm1 | mame 0.242+dfsg.1-1ubuntu0.1~esm1 | Jun 23, 2022 |
| mame · Ubuntu 24.04.5 LTS (noble) | 0.264+dfsg.1-1ubuntu0.1~esm1 | mame 0.264+dfsg.1-1ubuntu0.1~esm1 | Jun 23, 2022 |
| mame · Ubuntu 25.10 (questing) | 0.277+dfsg.1-4ubuntu0.1 | mame 0.277+dfsg.1-4ubuntu0.1 | Jun 23, 2022 |
| mame · Ubuntu 26.04.1 LTS (resolute) | 0.281+dfsg1-1build1 | mame 0.281+dfsg1-1build1 | Jan 5, 2022 |
| mame-data · Ubuntu 18.04.6 LTS (bionic) | 0.195+dfsg.1-2ubuntu0.1~esm1 | mame-data 0.195+dfsg.1-2ubuntu0.1~esm1 | Jun 23, 2022 |
| mame-data · Ubuntu 20.04 LTS (focal) | 0.220+dfsg.1-1ubuntu0.1~esm1 | mame-data 0.220+dfsg.1-1ubuntu0.1~esm1 | Jun 23, 2022 |
| mame-data · Ubuntu 22.04.1 LTS (jammy) | 0.242+dfsg.1-1ubuntu0.1~esm1 | mame-data 0.242+dfsg.1-1ubuntu0.1~esm1 | Jun 23, 2022 |
| mame-data · Ubuntu 24.04.5 LTS (noble) | 0.264+dfsg.1-1ubuntu0.1~esm1 | mame-data 0.264+dfsg.1-1ubuntu0.1~esm1 | Jun 23, 2022 |
| mame-data · Ubuntu 25.10 (questing) | 0.277+dfsg.1-4ubuntu0.1 | mame-data 0.277+dfsg.1-4ubuntu0.1 | Jun 23, 2022 |
| mame-data · Ubuntu 26.04.1 LTS (resolute) | 0.281+dfsg1-1build1 | mame-data 0.281+dfsg1-1build1 | Jan 5, 2022 |
| mame-tools · Ubuntu 18.04.6 LTS (bionic) | 0.195+dfsg.1-2ubuntu0.1~esm1 | mame-tools 0.195+dfsg.1-2ubuntu0.1~esm1 | Jun 23, 2022 |
| mame-tools · Ubuntu 20.04 LTS (focal) | 0.220+dfsg.1-1ubuntu0.1~esm1 | mame-tools 0.220+dfsg.1-1ubuntu0.1~esm1 | Jun 23, 2022 |
| mame-tools · Ubuntu 22.04.1 LTS (jammy) | 0.242+dfsg.1-1ubuntu0.1~esm1 | mame-tools 0.242+dfsg.1-1ubuntu0.1~esm1 | Jun 23, 2022 |
| mame-tools · Ubuntu 24.04.5 LTS (noble) | 0.264+dfsg.1-1ubuntu0.1~esm1 | mame-tools 0.264+dfsg.1-1ubuntu0.1~esm1 | Jun 23, 2022 |
| mame-tools · Ubuntu 25.10 (questing) | 0.277+dfsg.1-4ubuntu0.1 | mame-tools 0.277+dfsg.1-4ubuntu0.1 | Jun 23, 2022 |
| mame-tools · Ubuntu 26.04.1 LTS (resolute) | 0.281+dfsg1-1build1 | mame-tools 0.281+dfsg1-1build1 | Jan 5, 2022 |
| xmlrpc-c · RHEL 8 | 0:1.51.0-8.el8 | RHSA-2022:7692 | Nov 8, 2022 |
| xmlrpc-c · almalinux 8 | 1.51.0-8.el8 | ALSA-2022:7692 | Nov 8, 2022 |
| xmlrpc-c · ol 8 | 0:1.51.0-8.el8 | ELSA-2022-7692 | Nov 15, 2022 |
| xmlrpc-c · rocky 8 | 0:1.51.0-8.el8 | RLSA-2022:7692 | Nov 8, 2022 |
| xmlrpc-c-c++ · RHEL 8 | 0:1.51.0-8.el8 | RHSA-2022:7692 | Nov 8, 2022 |
| xmlrpc-c-c++ · almalinux 8 | 1.51.0-8.el8 | ALSA-2022:7692 | Nov 8, 2022 |
| xmlrpc-c-c++ · ol 8 | 0:1.51.0-8.el8 | ELSA-2022-7692 | Nov 15, 2022 |
| xmlrpc-c-client · RHEL 8 | 0:1.51.0-8.el8 | RHSA-2022:7692 | Nov 8, 2022 |
| xmlrpc-c-client · almalinux 8 | 1.51.0-8.el8 | ALSA-2022:7692 | Nov 8, 2022 |
| xmlrpc-c-client · ol 8 | 0:1.51.0-8.el8 | ELSA-2022-7692 | Nov 15, 2022 |
| xmlrpc-c-client++ · RHEL 8 | 0:1.51.0-8.el8 | RHSA-2022:7692 | Nov 8, 2022 |
| xmlrpc-c-client++ · almalinux 8 | 1.51.0-8.el8 | ALSA-2022:7692 | Nov 8, 2022 |
| xmlrpc-c-client++ · ol 8 | 0:1.51.0-8.el8 | ELSA-2022-7692 | Nov 15, 2022 |
| xmlrpc-c-devel · RHEL 8 | 0:1.51.0-8.el8 | RHSA-2022:7692 | Nov 8, 2022 |
| xmlrpc-c-devel · almalinux 8 | 1.51.0-8.el8 | ALSA-2022:7692 | Nov 8, 2022 |
| xmlrpc-c-devel · ol 8 | 0:1.51.0-8.el8 | ELSA-2022-7692 | Nov 15, 2022 |
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