# CVE-2022-23990: expat: Expat (aka libexpat) before 2.4.4 has an integer overflow in the doProlog function. CVE-2022-23990 is fixed in 9 products on 1 platform, first by DEBIAN-CVE-2022-23990, released January 26, 2022. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2022-23990 - Priority: High - CVSS: 9.8 (Medium) - EPSS: 0.0469 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Jan 26, 2022 ## Description Expat (aka libexpat) before 2.4.4 has an integer overflow in the doProlog function. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | expat Debian 12.15 (bookworm) | 2.4.3-3 | [DEBIAN-CVE-2022-23990](https://patchblox.com/security/data/fix/linux/debian-cve-2022-23990.md) | Jan 26, 2022 | | Linux | expat Debian 13.5 (trixie) | 2.4.3-3 | [DEBIAN-CVE-2022-23990](https://patchblox.com/security/data/fix/linux/debian-cve-2022-23990.md) | Jan 26, 2022 | | Linux | expat Debian 14 | 2.4.3-3 | [DEBIAN-CVE-2022-23990](https://patchblox.com/security/data/fix/linux/debian-cve-2022-23990.md) | Jan 26, 2022 | | Linux | expat RHEL 8 | 0:2.5.0-1.el8_10 | [RHSA-2025:21776](https://patchblox.com/security/data/fix/linux/rhsa-2025-21776.md) | Nov 19, 2025 | | 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 24.10 (oracular) | 2.4.3-3 | [expat 2.4.3-3](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-expat-2.4.3-3.md) | Jan 16, 2026 | | Linux | expat Ubuntu 25.04 (plucky) | 2.4.3-3 | [expat 2.4.3-3](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-expat-2.4.3-3.md) | Jan 16, 2026 | | Linux | expat almalinux 8 | 2.5.0-1.el8_10 | [ALSA-2025:21776](https://patchblox.com/security/data/fix/linux/alsa-2025-21776.md) | Nov 19, 2025 | | 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 | 0:2.2.5-4.0.1.el8_5.3 | [ELSA-2022-9232](https://patchblox.com/security/data/fix/linux/elsa-2022-9232.md) | Mar 18, 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 | 0:2.5.0-1.el8_10 | [RHSA-2025:21776](https://patchblox.com/security/data/fix/linux/rhsa-2025-21776.md) | Nov 19, 2025 | | 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 | 2.5.0-1.el8_10 | [ALSA-2025:21776](https://patchblox.com/security/data/fix/linux/alsa-2025-21776.md) | Nov 19, 2025 | | 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 | 0:2.2.5-4.0.1.el8_5.3 | [ELSA-2022-9232](https://patchblox.com/security/data/fix/linux/elsa-2022-9232.md) | Mar 18, 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 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 | 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) | 2.4.3-3 | [libexpat1 2.4.3-3](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-libexpat1-2.4.3-3.md) | Jan 16, 2026 | | Linux | libexpat1 Ubuntu 25.04 (plucky) | 2.4.3-3 | [libexpat1 2.4.3-3](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libexpat1-2.4.3-3.md) | Jan 16, 2026 | | 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 | --- Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.