# CVE-2022-23852: expat: Expat (aka libexpat) before 2.4.4 has a signed integer overflow inXML_GetBuffer, for configurations with a nonzero XM... CVE-2022-23852 is fixed in 7 products on 1 platform, first by expat 2.4.3-2, released January 23, 2022. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2022-23852 - Priority: High - CVSS: 9.8 (Medium) - EPSS: 0.0508 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Jan 23, 2022 ## Description Expat (aka libexpat) before 2.4.4 has a signed integer overflow inXML_GetBuffer, for configurations with a nonzero XML_CONTEXT_BYTES. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | expat Debian 12.15 (bookworm) | 2.4.3-2 | [DEBIAN-CVE-2022-23852](https://patchblox.com/security/data/fix/linux/debian-cve-2022-23852.md) | Jan 24, 2022 | | Linux | expat Debian 13.5 (trixie) | 2.4.3-2 | [DEBIAN-CVE-2022-23852](https://patchblox.com/security/data/fix/linux/debian-cve-2022-23852.md) | Jan 24, 2022 | | Linux | expat Debian 14 | 2.4.3-2 | [DEBIAN-CVE-2022-23852](https://patchblox.com/security/data/fix/linux/debian-cve-2022-23852.md) | Jan 24, 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) | 2.4.3-2 | [expat 2.4.3-2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-expat-2.4.3-2.md) | Jan 23, 2022 | | Linux | expat Ubuntu 24.10 (oracular) | 2.4.3-2 | [expat 2.4.3-2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-expat-2.4.3-2.md) | Jan 16, 2026 | | Linux | expat Ubuntu 25.04 (plucky) | 2.4.3-2 | [expat 2.4.3-2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-expat-2.4.3-2.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 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 22.04.1 LTS (jammy) | 2.4.3-2 | [libexpat1 2.4.3-2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libexpat1-2.4.3-2.md) | Jan 23, 2022 | | Linux | libexpat1 Ubuntu 24.10 (oracular) | 2.4.3-2 | [libexpat1 2.4.3-2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-libexpat1-2.4.3-2.md) | Jan 16, 2026 | | Linux | libexpat1 Ubuntu 25.04 (plucky) | 2.4.3-2 | [libexpat1 2.4.3-2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libexpat1-2.4.3-2.md) | Jan 16, 2026 | --- Data as of 2026-11-08T06:59:42Z 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.