# CVE-2022-25313: expat: In Expat (aka libexpat) before 2.4.5, an attacker can trigger stack exhaustion in build_model via a large nesting dep... CVE-2022-25313 is fixed in 9 products on 1 platform, first by expat 2.4.5-2, released February 15, 2022. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2022-25313 - Priority: High - CVSS: 7.5 (Medium) - EPSS: 0.0330 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Feb 17, 2022 ## Description In Expat (aka libexpat) before 2.4.5, an attacker can trigger stack exhaustion in build_model via a large nesting depth in the DTD element. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | expat Debian 12.15 (bookworm) | 2.4.5-1 | [DEBIAN-CVE-2022-25313](https://patchblox.com/security/data/fix/linux/debian-cve-2022-25313.md) | Feb 18, 2022 | | Linux | expat Debian 13.5 (trixie) | 2.4.5-1 | [DEBIAN-CVE-2022-25313](https://patchblox.com/security/data/fix/linux/debian-cve-2022-25313.md) | Feb 18, 2022 | | Linux | expat Debian 14 | 2.4.5-1 | [DEBIAN-CVE-2022-25313](https://patchblox.com/security/data/fix/linux/debian-cve-2022-25313.md) | Feb 18, 2022 | | Linux | expat RHEL 8 | 0:2.2.5-8.el8_6.2 | [RHSA-2022:5314](https://patchblox.com/security/data/fix/linux/rhsa-2022-5314.md) | Jun 30, 2022 | | Linux | expat RHEL 9 | 0:2.2.10-12.el9_0.2 | [RHSA-2022:5244](https://patchblox.com/security/data/fix/linux/rhsa-2022-5244.md) | Jul 1, 2022 | | Linux | expat Ubuntu 18.04.6 LTS (bionic) | 2.2.5-3ubuntu0.7 | [expat 2.2.5-3ubuntu0.7](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-expat-2.2.5-3ubuntu0.7.md) | Feb 17, 2022 | | Linux | expat Ubuntu 20.04 LTS (focal) | 2.2.9-1ubuntu0.4 | [expat 2.2.9-1ubuntu0.4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-expat-2.2.9-1ubuntu0.4.md) | Feb 17, 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-2022:5314](https://patchblox.com/security/data/fix/linux/alsa-2022-5314.md) | Jun 30, 2022 | | Linux | expat almalinux 9 | 2.2.10-12.el9_0.2 | [ALSA-2022:5244](https://patchblox.com/security/data/fix/linux/alsa-2022-5244.md) | Jul 1, 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 | 0:2.2.5-8.0.1.el8_6.2 | [ELSA-2022-5314](https://patchblox.com/security/data/fix/linux/elsa-2022-5314.md) | Jun 30, 2022 | | Linux | expat ol 9 | 0:2.2.10-12.el9_0.2 | [ELSA-2022-5244](https://patchblox.com/security/data/fix/linux/elsa-2022-5244.md) | Jun 30, 2022 | | Linux | expat rocky 8 | 0:2.2.5-8.el8_6.2 | [RLSA-2022:5314](https://patchblox.com/security/data/fix/linux/rlsa-2022-5314.md) | Jun 28, 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 | 0:2.2.5-8.el8_6.2 | [RHSA-2022:5314](https://patchblox.com/security/data/fix/linux/rhsa-2022-5314.md) | Jun 30, 2022 | | Linux | expat-devel RHEL 9 | 0:2.2.10-12.el9_0.2 | [RHSA-2022:5244](https://patchblox.com/security/data/fix/linux/rhsa-2022-5244.md) | Jul 1, 2022 | | Linux | expat-devel almalinux 8 | 2.2.5-8.el8_6.2 | [ALSA-2022:5314](https://patchblox.com/security/data/fix/linux/alsa-2022-5314.md) | Jun 30, 2022 | | Linux | expat-devel almalinux 9 | 2.2.10-12.el9_0.2 | [ALSA-2022:5244](https://patchblox.com/security/data/fix/linux/alsa-2022-5244.md) | Jul 1, 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 | 0:2.2.5-8.0.1.el8_6.2 | [ELSA-2022-5314](https://patchblox.com/security/data/fix/linux/elsa-2022-5314.md) | Jun 30, 2022 | | Linux | expat-devel ol 9 | 0:2.2.10-12.el9_0.2 | [ELSA-2022-5244](https://patchblox.com/security/data/fix/linux/elsa-2022-5244.md) | Jun 30, 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) | 2.2.5-3ubuntu0.7 | [libexpat1 2.2.5-3ubuntu0.7](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libexpat1-2.2.5-3ubuntu0.7.md) | Feb 17, 2022 | | Linux | libexpat1 Ubuntu 20.04 LTS (focal) | 2.2.9-1ubuntu0.4 | [libexpat1 2.2.9-1ubuntu0.4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libexpat1-2.2.9-1ubuntu0.4.md) | Feb 17, 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 | 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 2026-11-08T00:53:09Z UTC. 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