Fedora 42: python3.12 High CVE-2025-12084 DoS Fix FEDORA-2026

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

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

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.

Security fix for CVE-2025-12084 Require at least the same expat version as used during the build time

* Tue Jan 6 2026 Lumr Balhar - 3.12.12-2 - Security fix for CVE-2025-12084 - Require at least the same expat version as used during the build time

* Tue Jan 6 2026 Lumr Balhar - 3.12.12-2 - Security fix for CVE-2025-12084 - Require at least the same expat version as used during the build time

[ 1 ] Bug #2421612 - CVE-2025-12084 python3.12: cpython: Quadratic algorithm in xml.dom.minidom leads to denial of service [fedora-42]

[ 1 ] Bug #2421612 - CVE-2025-12084 python3.12: cpython: Quadratic algorithm in xml.dom.minidom leads to denial of service [fedora-42]

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