# CVE-2022-22824: expat: defineAttribute in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow. CVE-2022-22824 is fixed in 22 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. - Web page: https://patchblox.com/security/cve/CVE-2022-22824 - Priority: High - CVSS: 9.8 (Medium) - EPSS: 0.0387 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Jan 10, 2022 ## Description defineAttribute in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | expat Debian 12.15 (bookworm) | 2.4.3-1 | [DEBIAN-CVE-2022-22824](https://patchblox.com/security/data/fix/linux/debian-cve-2022-22824.md) | Jan 10, 2022 | | Linux | expat Debian 13.5 (trixie) | 2.4.3-1 | [DEBIAN-CVE-2022-22824](https://patchblox.com/security/data/fix/linux/debian-cve-2022-22824.md) | Jan 10, 2022 | | Linux | expat Debian 14 | 2.4.3-1 | [DEBIAN-CVE-2022-22824](https://patchblox.com/security/data/fix/linux/debian-cve-2022-22824.md) | Jan 10, 2022 | | Linux | expat RHEL 8 | 0:2.2.5-4.el8_5.3 | [RHSA-2022:0951](https://patchblox.com/security/data/fix/linux/rhsa-2022-0951.md) | Mar 16, 2022 | | Linux | expat RHEL 9 | 0:2.2.10-12.el9_0 | [RHBA-2022:4046](https://patchblox.com/security/data/fix/linux/rhba-2022-4046.md) | May 17, 2022 | | Linux | expat Ubuntu 18.04.6 LTS (bionic) | 2.2.5-3ubuntu0.4 | [expat 2.2.5-3ubuntu0.4](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-expat-2.2.5-3ubuntu0.4.md) | Feb 14, 2022 | | Linux | expat Ubuntu 20.04 LTS (focal) | 2.2.9-1ubuntu0.2 | [expat 2.2.9-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-expat-2.2.9-1ubuntu0.2.md) | Feb 14, 2022 | | Linux | expat Ubuntu 22.04.1 LTS (jammy) | 2.4.3-1 | [expat 2.4.3-1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-expat-2.4.3-1.md) | Jan 10, 2022 | | Linux | expat Ubuntu 24.10 (oracular) | 2.4.3-1 | [expat 2.4.3-1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-expat-2.4.3-1.md) | Jan 16, 2026 | | Linux | expat Ubuntu 25.04 (plucky) | 2.4.3-1 | [expat 2.4.3-1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-expat-2.4.3-1.md) | Jan 16, 2026 | | Linux | expat almalinux 8 | 2.2.5-8.el8_6.2 | [ALSA-2022:0951](https://patchblox.com/security/data/fix/linux/alsa-2022-0951.md) | Mar 16, 2022 | | Linux | expat amzn 2023 | 2.5.0-1.amzn2023.0.2 | [ALAS2023-2023-058](https://patchblox.com/security/data/fix/linux/alas2023-2023-058.md) | Feb 17, 2023 | | Linux | expat ol 8 | 0:2.2.5-4.el8_5.3 | [ELSA-2022-0951](https://patchblox.com/security/data/fix/linux/elsa-2022-0951.md) | Mar 16, 2022 | | Linux | expat rocky 8 | 0:2.2.5-4.el8_5.3 | [RLSA-2022:0951](https://patchblox.com/security/data/fix/linux/rlsa-2022-0951.md) | Mar 16, 2022 | | Linux | expat-debuginfo amzn 2023 | 2.5.0-1.amzn2023.0.2 | [ALAS2023-2023-058](https://patchblox.com/security/data/fix/linux/alas2023-2023-058.md) | Feb 17, 2023 | | Linux | expat-debugsource amzn 2023 | 2.5.0-1.amzn2023.0.2 | [ALAS2023-2023-058](https://patchblox.com/security/data/fix/linux/alas2023-2023-058.md) | Feb 17, 2023 | | Linux | expat-devel RHEL 8 | 0:2.2.5-4.el8_5.3 | [RHSA-2022:0951](https://patchblox.com/security/data/fix/linux/rhsa-2022-0951.md) | Mar 16, 2022 | | Linux | expat-devel RHEL 9 | 0:2.2.10-12.el9_0 | [RHBA-2022:4046](https://patchblox.com/security/data/fix/linux/rhba-2022-4046.md) | May 17, 2022 | | Linux | expat-devel almalinux 8 | 2.2.5-8.el8_6.2 | [ALSA-2022:0951](https://patchblox.com/security/data/fix/linux/alsa-2022-0951.md) | Mar 16, 2022 | | Linux | expat-devel amzn 2023 | 2.5.0-1.amzn2023.0.2 | [ALAS2023-2023-058](https://patchblox.com/security/data/fix/linux/alas2023-2023-058.md) | Feb 17, 2023 | | Linux | expat-devel ol 8 | 0:2.2.5-4.el8_5.3 | [ELSA-2022-0951](https://patchblox.com/security/data/fix/linux/elsa-2022-0951.md) | Mar 16, 2022 | | Linux | expat-static amzn 2023 | 2.5.0-1.amzn2023.0.2 | [ALAS2023-2023-058](https://patchblox.com/security/data/fix/linux/alas2023-2023-058.md) | Feb 17, 2023 | | Linux | firefox RHEL 8 | 0:91.7.0-3.el8_5 | [RHSA-2022:0818](https://patchblox.com/security/data/fix/linux/rhsa-2022-0818.md) | Mar 10, 2022 | | Linux | firefox Ubuntu 18.04.6 LTS (bionic) | 98.0+build3-0ubuntu0.18.04.2 | [firefox 98.0+build3-0ubuntu0.18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-98.0-build3-0ubuntu0.18.04.2.md) | Mar 8, 2022 | | Linux | firefox Ubuntu 20.04 LTS (focal) | 98.0+build3-0ubuntu0.20.04.2 | [firefox 98.0+build3-0ubuntu0.20.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-98.0-build3-0ubuntu0.20.04.2.md) | Mar 8, 2022 | | Linux | firefox Ubuntu 22.04.1 LTS (jammy) | 1:1snap1-0ubuntu1 | [firefox 1:1snap1-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-firefox-1-1snap1-0ubuntu1.md) | Apr 6, 2022 | | Linux | firefox Ubuntu 24.10 (oracular) | 1:1snap1-0ubuntu1 | [firefox 1:1snap1-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-firefox-1-1snap1-0ubuntu1.md) | Feb 15, 2022 | | Linux | firefox Ubuntu 25.04 (plucky) | 1:1snap1-0ubuntu1 | [firefox 1:1snap1-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-firefox-1-1snap1-0ubuntu1.md) | Feb 15, 2022 | | Linux | firefox-geckodriver Ubuntu 18.04.6 LTS (bionic) | 98.0+build3-0ubuntu0.18.04.2 | [firefox-geckodriver 98.0+build3-0ubuntu0.18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-geckodriver-98.0-build3-0ubuntu0.18.04.2.md) | Mar 8, 2022 | | Linux | firefox-geckodriver Ubuntu 20.04 LTS (focal) | 98.0+build3-0ubuntu0.20.04.2 | [firefox-geckodriver 98.0+build3-0ubuntu0.20.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-geckodriver-98.0-build3-0ubuntu0.20.04.2.md) | Mar 8, 2022 | | Linux | firefox-mozsymbols Ubuntu 18.04.6 LTS (bionic) | 98.0+build3-0ubuntu0.18.04.2 | [firefox-mozsymbols 98.0+build3-0ubuntu0.18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-mozsymbols-98.0-build3-0ubuntu0.18.04.2.md) | Mar 8, 2022 | | Linux | firefox-mozsymbols Ubuntu 20.04 LTS (focal) | 98.0+build3-0ubuntu0.20.04.2 | [firefox-mozsymbols 98.0+build3-0ubuntu0.20.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-mozsymbols-98.0-build3-0ubuntu0.20.04.2.md) | Mar 8, 2022 | | Linux | libexpat1 Ubuntu 18.04.6 LTS (bionic) | 2.2.5-3ubuntu0.4 | [libexpat1 2.2.5-3ubuntu0.4](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libexpat1-2.2.5-3ubuntu0.4.md) | Feb 14, 2022 | | Linux | libexpat1 Ubuntu 20.04 LTS (focal) | 2.2.9-1ubuntu0.2 | [libexpat1 2.2.9-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libexpat1-2.2.9-1ubuntu0.2.md) | Feb 14, 2022 | | Linux | libexpat1 Ubuntu 22.04.1 LTS (jammy) | 2.4.3-1 | [libexpat1 2.4.3-1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libexpat1-2.4.3-1.md) | Jan 10, 2022 | | Linux | libexpat1 Ubuntu 24.10 (oracular) | 2.4.3-1 | [libexpat1 2.4.3-1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-libexpat1-2.4.3-1.md) | Jan 16, 2026 | | Linux | libexpat1 Ubuntu 25.04 (plucky) | 2.4.3-1 | [libexpat1 2.4.3-1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libexpat1-2.4.3-1.md) | Jan 16, 2026 | | Linux | libxmltok1 Ubuntu 18.04.6 LTS (bionic) | 1.2-4ubuntu0.18.04.1~esm4 | [libxmltok1 1.2-4ubuntu0.18.04.1~esm4](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libxmltok1-1.2-4ubuntu0.18.04.1-esm4.md) | Jan 10, 2022 | | Linux | libxmltok1 Ubuntu 20.04 LTS (focal) | 1.2-4ubuntu0.20.04.1~esm4 | [libxmltok1 1.2-4ubuntu0.20.04.1~esm4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libxmltok1-1.2-4ubuntu0.20.04.1-esm4.md) | Jan 10, 2022 | | Linux | libxmltok1 Ubuntu 22.04.1 LTS (jammy) | 1.2-4ubuntu0.22.04.1~esm4 | [libxmltok1 1.2-4ubuntu0.22.04.1~esm4](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libxmltok1-1.2-4ubuntu0.22.04.1-esm4.md) | Jan 10, 2022 | | Linux | 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](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libxmltok1t64-1.2-4.1ubuntu2.24.0.4.1-esm2.md) | Jan 10, 2022 | | Linux | libxmltok1t64 Ubuntu 24.10 (oracular) | 1.2-4.1ubuntu3.1 | [libxmltok1t64 1.2-4.1ubuntu3.1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-libxmltok1t64-1.2-4.1ubuntu3.1.md) | Sep 4, 2019 | | Linux | thunderbird RHEL 8 | 0:91.7.0-2.el8_5 | [RHSA-2022:0845](https://patchblox.com/security/data/fix/linux/rhsa-2022-0845.md) | Mar 14, 2022 | | Linux | thunderbird Ubuntu 20.04 LTS (focal) | 1:91.11.0+build2-0ubuntu0.20.04.1 | [thunderbird 1:91.11.0+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-thunderbird-1-91.11.0-build2-0ubuntu0.20.04.1.md) | Jul 4, 2022 | | Linux | thunderbird Ubuntu 22.04.1 LTS (jammy) | 1:91.11.0+build2-0ubuntu0.22.04.1 | [thunderbird 1:91.11.0+build2-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-thunderbird-1-91.11.0-build2-0ubuntu0.22.04.1.md) | Jul 4, 2022 | | Linux | thunderbird-gnome-support Ubuntu 20.04 LTS (focal) | 1:91.11.0+build2-0ubuntu0.20.04.1 | [thunderbird-gnome-support 1:91.11.0+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-thunderbird-gnome-support-1-91.11.0-build2-0ubuntu0.20.04.1.md) | Jul 4, 2022 | | Linux | thunderbird-gnome-support Ubuntu 22.04.1 LTS (jammy) | 1:91.11.0+build2-0ubuntu0.22.04.1 | [thunderbird-gnome-support 1:91.11.0+build2-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-thunderbird-gnome-support-1-91.11.0-build2-0ubuntu0.22.04.1.md) | Jul 4, 2022 | | Linux | thunderbird-mozsymbols Ubuntu 20.04 LTS (focal) | 1:91.11.0+build2-0ubuntu0.20.04.1 | [thunderbird-mozsymbols 1:91.11.0+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-thunderbird-mozsymbols-1-91.11.0-build2-0ubuntu0.20.04.1.md) | Jul 4, 2022 | | Linux | thunderbird-mozsymbols Ubuntu 22.04.1 LTS (jammy) | 1:91.11.0+build2-0ubuntu0.22.04.1 | [thunderbird-mozsymbols 1:91.11.0+build2-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-thunderbird-mozsymbols-1-91.11.0-build2-0ubuntu0.22.04.1.md) | Jul 4, 2022 | | Linux | xmlrpc-c RHEL 8 | 0:1.51.0-8.el8 | [RHSA-2022:7692](https://patchblox.com/security/data/fix/linux/rhsa-2022-7692.md) | Nov 8, 2022 | | Linux | xmlrpc-c almalinux 8 | 1.51.0-8.el8 | [ALSA-2022:7692](https://patchblox.com/security/data/fix/linux/alsa-2022-7692.md) | Nov 8, 2022 | | Linux | xmlrpc-c ol 8 | 0:1.51.0-8.el8 | [ELSA-2022-7692](https://patchblox.com/security/data/fix/linux/elsa-2022-7692.md) | Nov 15, 2022 | | Linux | xmlrpc-c rocky 8 | 0:1.51.0-8.el8 | [RLSA-2022:7692](https://patchblox.com/security/data/fix/linux/rlsa-2022-7692.md) | Nov 8, 2022 | | Linux | xmlrpc-c-c++ RHEL 8 | 0:1.51.0-8.el8 | [RHSA-2022:7692](https://patchblox.com/security/data/fix/linux/rhsa-2022-7692.md) | Nov 8, 2022 | | Linux | xmlrpc-c-c++ almalinux 8 | 1.51.0-8.el8 | [ALSA-2022:7692](https://patchblox.com/security/data/fix/linux/alsa-2022-7692.md) | Nov 8, 2022 | | Linux | xmlrpc-c-c++ ol 8 | 0:1.51.0-8.el8 | [ELSA-2022-7692](https://patchblox.com/security/data/fix/linux/elsa-2022-7692.md) | Nov 15, 2022 | | Linux | xmlrpc-c-client RHEL 8 | 0:1.51.0-8.el8 | [RHSA-2022:7692](https://patchblox.com/security/data/fix/linux/rhsa-2022-7692.md) | Nov 8, 2022 | | Linux | xmlrpc-c-client almalinux 8 | 1.51.0-8.el8 | [ALSA-2022:7692](https://patchblox.com/security/data/fix/linux/alsa-2022-7692.md) | Nov 8, 2022 | | Linux | xmlrpc-c-client ol 8 | 0:1.51.0-8.el8 | [ELSA-2022-7692](https://patchblox.com/security/data/fix/linux/elsa-2022-7692.md) | Nov 15, 2022 | | Linux | xmlrpc-c-client++ RHEL 8 | 0:1.51.0-8.el8 | [RHSA-2022:7692](https://patchblox.com/security/data/fix/linux/rhsa-2022-7692.md) | Nov 8, 2022 | | Linux | xmlrpc-c-client++ almalinux 8 | 1.51.0-8.el8 | [ALSA-2022:7692](https://patchblox.com/security/data/fix/linux/alsa-2022-7692.md) | Nov 8, 2022 | | Linux | xmlrpc-c-client++ ol 8 | 0:1.51.0-8.el8 | [ELSA-2022-7692](https://patchblox.com/security/data/fix/linux/elsa-2022-7692.md) | Nov 15, 2022 | | Linux | xmlrpc-c-devel RHEL 8 | 0:1.51.0-8.el8 | [RHSA-2022:7692](https://patchblox.com/security/data/fix/linux/rhsa-2022-7692.md) | Nov 8, 2022 | | Linux | xmlrpc-c-devel almalinux 8 | 1.51.0-8.el8 | [ALSA-2022:7692](https://patchblox.com/security/data/fix/linux/alsa-2022-7692.md) | Nov 8, 2022 | | Linux | xmlrpc-c-devel ol 8 | 0:1.51.0-8.el8 | [ELSA-2022-7692](https://patchblox.com/security/data/fix/linux/elsa-2022-7692.md) | Nov 15, 2022 | | Linux | xul-ext-calendar-timezones Ubuntu 20.04 LTS (focal) | 1:91.11.0+build2-0ubuntu0.20.04.1 | [xul-ext-calendar-timezones 1:91.11.0+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xul-ext-calendar-timezones-1-91.11.0-build2-0ubuntu0.20.04.1.md) | Jul 4, 2022 | | Linux | xul-ext-calendar-timezones Ubuntu 22.04.1 LTS (jammy) | 1:91.11.0+build2-0ubuntu0.22.04.1 | [xul-ext-calendar-timezones 1:91.11.0+build2-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-xul-ext-calendar-timezones-1-91.11.0-build2-0ubuntu0.22.04.1.md) | Jul 4, 2022 | | Linux | xul-ext-gdata-provider Ubuntu 20.04 LTS (focal) | 1:91.11.0+build2-0ubuntu0.20.04.1 | [xul-ext-gdata-provider 1:91.11.0+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xul-ext-gdata-provider-1-91.11.0-build2-0ubuntu0.20.04.1.md) | Jul 4, 2022 | | Linux | xul-ext-gdata-provider Ubuntu 22.04.1 LTS (jammy) | 1:91.11.0+build2-0ubuntu0.22.04.1 | [xul-ext-gdata-provider 1:91.11.0+build2-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-xul-ext-gdata-provider-1-91.11.0-build2-0ubuntu0.22.04.1.md) | Jul 4, 2022 | | Linux | xul-ext-lightning Ubuntu 20.04 LTS (focal) | 1:91.11.0+build2-0ubuntu0.20.04.1 | [xul-ext-lightning 1:91.11.0+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xul-ext-lightning-1-91.11.0-build2-0ubuntu0.20.04.1.md) | Jul 4, 2022 | | Linux | xul-ext-lightning Ubuntu 22.04.1 LTS (jammy) | 1:91.11.0+build2-0ubuntu0.22.04.1 | [xul-ext-lightning 1:91.11.0+build2-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-xul-ext-lightning-1-91.11.0-build2-0ubuntu0.22.04.1.md) | Jul 4, 2022 | --- Data as of 2026-11-08T13:06:02Z UTC. 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