# CVE-2022-25236: libxmltok1: xmlparse.c in Expat (aka libexpat) before 2.4.5 allows attackers to insert namespace-separator characters into namesp... CVE-2022-25236 is fixed in 20 products on 1 platform, first by expat 2.2.5-3ubuntu0.4, released February 14, 2022. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2022-25236 - Priority: High - CVSS: 9.8 (High) - EPSS: 0.3527 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Feb 14, 2022 ## Description xmlparse.c in Expat (aka libexpat) before 2.4.5 allows attackers to insert namespace-separator characters into namespace URIs. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | expat Debian 12.15 (bookworm) | 2.4.5-1 | [DEBIAN-CVE-2022-25236](https://patchblox.com/security/data/fix/linux/debian-cve-2022-25236.md) | Feb 16, 2022 | | Linux | expat Debian 13.5 (trixie) | 2.4.5-1 | [DEBIAN-CVE-2022-25236](https://patchblox.com/security/data/fix/linux/debian-cve-2022-25236.md) | Feb 16, 2022 | | Linux | expat Debian 14 | 2.4.5-1 | [DEBIAN-CVE-2022-25236](https://patchblox.com/security/data/fix/linux/debian-cve-2022-25236.md) | Feb 16, 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 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 24.10 (oracular) | 2.4.5-2 | [expat 2.4.5-2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-expat-2.4.5-2.md) | Feb 15, 2022 | | Linux | expat Ubuntu 25.04 (plucky) | 2.4.5-2 | [expat 2.4.5-2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-expat-2.4.5-2.md) | Feb 15, 2022 | | 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 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 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 almalinux 8 | 91.7.0-3.el8_5.alma | [ALSA-2022:0818](https://patchblox.com/security/data/fix/linux/alsa-2022-0818.md) | Mar 10, 2022 | | Linux | firefox ol 8 | 0:91.7.0-3.0.1.el8_5 | [ELSA-2022-0818](https://patchblox.com/security/data/fix/linux/elsa-2022-0818.md) | Mar 10, 2022 | | Linux | firefox rocky 8 | 0:91.7.0-3.el8_5 | [RLSA-2022:0818](https://patchblox.com/security/data/fix/linux/rlsa-2022-0818.md) | Mar 10, 2022 | | Linux | libcoin80-runtime Ubuntu 18.04.6 LTS (bionic) | 3.1.4~abc9f50+dfsg3-2ubuntu0.1~esm1 | [libcoin80-runtime 3.1.4~abc9f50+dfsg3-2ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libcoin80-runtime-3.1.4-abc9f50-dfsg3-2ubuntu0.1-esm1.md) | Feb 14, 2022 | | Linux | libcoin80v5 Ubuntu 18.04.6 LTS (bionic) | 3.1.4~abc9f50+dfsg3-2ubuntu0.1~esm1 | [libcoin80v5 3.1.4~abc9f50+dfsg3-2ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libcoin80v5-3.1.4-abc9f50-dfsg3-2ubuntu0.1-esm1.md) | Feb 14, 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 24.10 (oracular) | 2.4.5-2 | [libexpat1 2.4.5-2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-libexpat1-2.4.5-2.md) | Feb 15, 2022 | | Linux | libexpat1 Ubuntu 25.04 (plucky) | 2.4.5-2 | [libexpat1 2.4.5-2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libexpat1-2.4.5-2.md) | Feb 15, 2022 | | Linux | libxmlrpc-c++8t64 Ubuntu 24.04.5 LTS (noble) | 1.33.14-12ubuntu0.1~esm1 | [libxmlrpc-c++8t64 1.33.14-12ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libxmlrpc-c-8t64-1.33.14-12ubuntu0.1-esm1.md) | Feb 14, 2022 | | Linux | libxmlrpc-c++8v5 Ubuntu 18.04.6 LTS (bionic) | 1.33.14-8ubuntu0.18.04.1~esm1 | [libxmlrpc-c++8v5 1.33.14-8ubuntu0.18.04.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libxmlrpc-c-8v5-1.33.14-8ubuntu0.18.04.1-esm1.md) | Feb 14, 2022 | | Linux | libxmlrpc-c++8v5 Ubuntu 20.04 LTS (focal) | 1.33.14-8ubuntu0.20.04.1~esm1 | [libxmlrpc-c++8v5 1.33.14-8ubuntu0.20.04.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libxmlrpc-c-8v5-1.33.14-8ubuntu0.20.04.1-esm1.md) | Feb 14, 2022 | | Linux | libxmlrpc-c++8v5 Ubuntu 22.04.1 LTS (jammy) | 1.33.14-10ubuntu0.1~esm1 | [libxmlrpc-c++8v5 1.33.14-10ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libxmlrpc-c-8v5-1.33.14-10ubuntu0.1-esm1.md) | Feb 14, 2022 | | Linux | libxmlrpc-core-c3 Ubuntu 18.04.6 LTS (bionic) | 1.33.14-8ubuntu0.18.04.1~esm1 | [libxmlrpc-core-c3 1.33.14-8ubuntu0.18.04.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libxmlrpc-core-c3-1.33.14-8ubuntu0.18.04.1-esm1.md) | Feb 14, 2022 | | Linux | libxmlrpc-core-c3 Ubuntu 20.04 LTS (focal) | 1.33.14-8ubuntu0.20.04.1~esm1 | [libxmlrpc-core-c3 1.33.14-8ubuntu0.20.04.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libxmlrpc-core-c3-1.33.14-8ubuntu0.20.04.1-esm1.md) | Feb 14, 2022 | | Linux | libxmlrpc-core-c3 Ubuntu 22.04.1 LTS (jammy) | 1.33.14-10ubuntu0.1~esm1 | [libxmlrpc-core-c3 1.33.14-10ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libxmlrpc-core-c3-1.33.14-10ubuntu0.1-esm1.md) | Feb 14, 2022 | | Linux | libxmlrpc-core-c3t64 Ubuntu 24.04.5 LTS (noble) | 1.33.14-12ubuntu0.1~esm1 | [libxmlrpc-core-c3t64 1.33.14-12ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libxmlrpc-core-c3t64-1.33.14-12ubuntu0.1-esm1.md) | Feb 14, 2022 | | Linux | libxmltok1 Ubuntu 18.04.6 LTS (bionic) | 1.2-4ubuntu0.18.04.1~esm1 | [libxmltok1 1.2-4ubuntu0.18.04.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libxmltok1-1.2-4ubuntu0.18.04.1-esm1.md) | Feb 14, 2022 | | Linux | libxmltok1 Ubuntu 20.04 LTS (focal) | 1.2-4ubuntu0.20.04.1~esm1 | [libxmltok1 1.2-4ubuntu0.20.04.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libxmltok1-1.2-4ubuntu0.20.04.1-esm1.md) | Feb 14, 2022 | | Linux | libxmltok1 Ubuntu 22.04.1 LTS (jammy) | 1.2-4ubuntu0.22.04.1~esm1 | [libxmltok1 1.2-4ubuntu0.22.04.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libxmltok1-1.2-4ubuntu0.22.04.1-esm1.md) | Feb 14, 2022 | | Linux | libxmltok1t64 Ubuntu 24.04.5 LTS (noble) | 1.2-4.1ubuntu1 | [libxmltok1t64 1.2-4.1ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libxmltok1t64-1.2-4.1ubuntu1.md) | Feb 14, 2022 | | Linux | libxmltok1t64 Ubuntu 24.10 (oracular) | 1.2-4.1ubuntu1 | [libxmltok1t64 1.2-4.1ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-libxmltok1t64-1.2-4.1ubuntu1.md) | Feb 15, 2022 | | Linux | libxmltok1t64 Ubuntu 25.04 (plucky) | 1.2-4.1ubuntu1 | [libxmltok1t64 1.2-4.1ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libxmltok1t64-1.2-4.1ubuntu1.md) | Feb 15, 2022 | | Linux | mingw32-expat RHEL 8 | 0:2.4.8-1.el8 | [RHSA-2022:7811](https://patchblox.com/security/data/fix/linux/rhsa-2022-7811.md) | Nov 8, 2022 | | Linux | mingw32-expat almalinux 8 | 2.4.8-1.el8 | [ALSA-2022:7811](https://patchblox.com/security/data/fix/linux/alsa-2022-7811.md) | Nov 8, 2022 | | Linux | mingw64-expat RHEL 8 | 0:2.4.8-1.el8 | [RHSA-2022:7811](https://patchblox.com/security/data/fix/linux/rhsa-2022-7811.md) | Nov 8, 2022 | | Linux | mingw64-expat almalinux 8 | 2.4.8-1.el8 | [ALSA-2022:7811](https://patchblox.com/security/data/fix/linux/alsa-2022-7811.md) | Nov 8, 2022 | | Linux | swish-e Ubuntu 18.04.6 LTS (bionic) | 2.4.7-5ubuntu1+esm1 | [swish-e 2.4.7-5ubuntu1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-swish-e-2.4.7-5ubuntu1-esm1.md) | Feb 14, 2022 | | Linux | swish-e Ubuntu 20.04 LTS (focal) | 2.4.7-6ubuntu0.1~esm1 | [swish-e 2.4.7-6ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-swish-e-2.4.7-6ubuntu0.1-esm1.md) | Feb 14, 2022 | | Linux | swish-e Ubuntu 22.04.1 LTS (jammy) | 2.4.7-6.1ubuntu0.1~esm1 | [swish-e 2.4.7-6.1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-swish-e-2.4.7-6.1ubuntu0.1-esm1.md) | Feb 14, 2022 | | Linux | swish-e Ubuntu 24.04.5 LTS (noble) | 2.4.7-6.2ubuntu0.1~esm1 | [swish-e 2.4.7-6.2ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-swish-e-2.4.7-6.2ubuntu0.1-esm1.md) | Feb 14, 2022 | | Linux | swish-e Ubuntu 26.04.1 LTS (resolute) | 2.4.7-7.1ubuntu0.1~esm1 | [swish-e 2.4.7-7.1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-swish-e-2.4.7-7.1ubuntu0.1-esm1.md) | Feb 14, 2022 | | 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 almalinux 8 | 91.7.0-2.el8_5.alma | [ALSA-2022:0845](https://patchblox.com/security/data/fix/linux/alsa-2022-0845.md) | Mar 14, 2022 | | Linux | thunderbird ol 8 | 0:91.7.0-2.0.1.el8_5 | [ELSA-2022-0845](https://patchblox.com/security/data/fix/linux/elsa-2022-0845.md) | Mar 14, 2022 | | Linux | thunderbird rocky 8 | 0:91.7.0-2.el8_5 | [RLSA-2022:0845](https://patchblox.com/security/data/fix/linux/rlsa-2022-0845.md) | Mar 14, 2022 | | Linux | xmlrpc-api-utils Ubuntu 18.04.6 LTS (bionic) | 1.33.14-8ubuntu0.18.04.1~esm1 | [xmlrpc-api-utils 1.33.14-8ubuntu0.18.04.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xmlrpc-api-utils-1.33.14-8ubuntu0.18.04.1-esm1.md) | Feb 14, 2022 | | Linux | xmlrpc-api-utils Ubuntu 20.04 LTS (focal) | 1.33.14-8ubuntu0.20.04.1~esm1 | [xmlrpc-api-utils 1.33.14-8ubuntu0.20.04.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xmlrpc-api-utils-1.33.14-8ubuntu0.20.04.1-esm1.md) | Feb 14, 2022 | | Linux | xmlrpc-api-utils Ubuntu 22.04.1 LTS (jammy) | 1.33.14-10ubuntu0.1~esm1 | [xmlrpc-api-utils 1.33.14-10ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-xmlrpc-api-utils-1.33.14-10ubuntu0.1-esm1.md) | Feb 14, 2022 | | Linux | xmlrpc-api-utils Ubuntu 24.04.5 LTS (noble) | 1.33.14-12ubuntu0.1~esm1 | [xmlrpc-api-utils 1.33.14-12ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-xmlrpc-api-utils-1.33.14-12ubuntu0.1-esm1.md) | Feb 14, 2022 | --- Data as of 2026-11-08T06:59:42Z UTC. 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