Moderate Vulnerability in Python3 Packages: Denial of Service Risk
Summary
ALSA-2026:1631: Moderate: python3 security update. Affects platform-python versions < 3.6.8-72.el8_10.alma.1. Fixed in 3.6.8-72.el8_10.alma.1. How to fix ↓
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Background
Python is a widely-used interpreted, interactive, object-oriented programming language known for its simplicity and versatility. It supports various system calls, libraries, and windowing systems, making it a popular choice for developers. The vulnerability in question affects multiple Python3 packages in the AlmaLinux 8 ecosystem, specifically related to a quadratic algorithm in the xml.dom.minidom module, which can lead to denial of service.
Vulnerability Detail
The vulnerability arises from a quadratic algorithm in the xml.dom.minidom module of Python, which can be exploited to cause a denial of service (DoS). This means that an attacker could craft specific XML input that, when processed, would consume excessive resources, leading to application unavailability. The issue is tracked under CVE-2025-12084, highlighting its significance in the security landscape.
How To Fix
Minimum fixed version
3.6.8-72.el8_10.alma.1
This is the first release that contains the fix.
sudo dnf update platform-pythonTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, avoid processing untrusted XML input with the xml.dom.minidom module until the packages are updated. This can help mitigate the risk of denial of service attacks while a permanent fix is being implemented.
Conclusion
In summary, a moderate vulnerability has been identified in several Python3 packages within the AlmaLinux 8 ecosystem, which can lead to denial of service due to a flawed algorithm in the xml.dom.minidom module. It is crucial to update the affected packages to the patched version to mitigate this risk.
See every vulnerability recorded for platform-python →
FAQ
The vulnerability is a denial of service risk due to a quadratic algorithm in the xml.dom.minidom module of Python.
The affected packages include platform-python, platform-python-debug, platform-python-devel, python3-idle, python3-libs, python3-test, and python3-tkinter.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
If immediate updates are not possible, avoid processing untrusted XML input with the xml.dom.minidom module as a temporary workaround.
More details can be found on the CVE page for CVE-2025-12084, which outlines the impact and technical specifics of the vulnerability.
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