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Fedora 43 mingw-python3 Addresses Critical DoS Vulnerability CVE-2025

Linuxsecurity •LinuxSecurity Advisories • December 23, 2025

[ 1 ] Bug #2421623 - CVE-2025-12084 mingw-python3: cpython: Quadratic algorithm in xml.dom.minidom leads to denial of service [fedora-42] [ 2 ] Bug #2421642 - CVE-2025-12084 mingw-python3: cpython: Quadratic algorithm in xml.dom.minidom leads to denial of service [fedora-43]

This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2025-883181272e' at the command line. For more information, refer to the dnf documentation available at

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Critical DoS Vulnerability in mingw-python3 Affects Fedora 42 and 43 A critical denial of service vulnerability, identified as CVE-2025-12084, affects the mingw-python3 package in Fedora 42 and 43 due to a quadratic algorithm issue in xml.dom.minidom. The vulnerability can lead to service disruptions for users of these Fedora versions. Users are advised to apply patches as they become available. 2 sources 39

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Fedora 43 mingw-python3 Addresses Critical DoS Vulnerability CVE-2025

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