Back Linuxsecurity Fedora 43 python3.9 Critical DoS Fix CVE-2025-12084 2026
Python 3.9 package for developers. This package exists to allow developers to test their code against an older version of Python. This is not a full Python stack and if you wish to run your applications with Python 3.9, see other distributions that support it, such as CentOS or RHEL or older Fedora releases. Update Information : Security fix for CVE-2025-12084
Python 3.9 package for developers.
This package exists to allow developers to test their code against an older
version of Python. This is not a full Python stack and if you wish to run
your applications with Python 3.9, see other distributions
that support it, such as CentOS or RHEL or older Fedora releases.
Security fix for CVE-2025-12084
* Wed Jan 14 2026 Lumr Balhar - 3.9.25-3 - Security fix for CVE-2025-12084 * Mon Nov 10 2025 Tomas Orsava - 3.9.25-2 - Move _sysconfigdata_d_linux*.py to the debug subpackage
* Wed Jan 14 2026 Lumr Balhar - 3.9.25-3 - Security fix for CVE-2025-12084 * Mon Nov 10 2025 Tomas Orsava - 3.9.25-2 - Move _sysconfigdata_d_linux*.py to the debug subpackage
[ 1 ] Bug #2422522 - CVE-2025-12084 python3.9: cpython: Quadratic algorithm in xml.dom.minidom leads to denial of service [fedora-43]
[ 1 ] Bug #2422522 - CVE-2025-12084 python3.9: 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-2026-975a15098b' at the command line. For more information, refer to the dnf documentation available at
The full story
This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.
