Fedora 42: python3.12 High CVE-2025-12084 DoS Fix FEDORA-2026-8e0e785a72
fedora
January 16, 2026
Security fix for CVE-2025-12084 Require at least the same expat version as used during the build time
Summary
Python 3.12 is an accessible, high-level, dynamically typed, interpreted
programming language, designed with an emphasis on code readability.
It includes an extensive standard library, and has a vast ecosystem of
third-party libraries.
The python3.12 package provides the "python3.12" executable: the reference
interpreter for the Python language, version 3.
The majority of its standard library is provided in the python3.12-libs package,
which should be installed automatically along with python3.12.
The remaining parts of the Python standard library are broken out into the
python3.12-tkinter and python3.12-test packages, which may need to be installed
separately.
Documentation for Python is provided in the python3.12-docs package.
Packages containing additional libraries for Python are generally named with
the "python3.12-" prefix.
Update Information:
Security fix for CVE-2025-12084 Require at least the same expat version as used during the build time
Topics Covered
Change Log
* Tue Jan 6 2026 Lumr Balhar
References
[ 1 ] Bug #2421612 - CVE-2025-12084 python3.12: cpython: Quadratic algorithm in xml.dom.minidom leads to denial of service [fedora-42]
https://bugzilla.redhat.com/show_bug.cgi?id=2421612
Update Instructions
This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-8e0e785a72' at the command line. For more information, refer to the dnf documentation available at http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label
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Severity
important
Lowest
Low
Medium
High
Critical
Name: python3.12
Product: Fedora 42
Version: 3.12.12
Release: 2.fc42
Summary: Version 3.12 of the Python interpreter
Topics Covered
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