Moderate Security Update for Python 3.11: Addressing Infinite Loop Vulnerability
Summary
ALSA-2025:15010: Moderate: python3.11 security update. Affects python3.11 versions < 3.11.11-2.el9_6.2. Fixed in 3.11.11-2.el9_6.2. How to fix ↓
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Background
Python 3.11 is an interpreted, interactive, object-oriented programming language that supports modules, classes, exceptions, and dynamic data types. It is widely used for various applications, including web development, data analysis, artificial intelligence, and more. This version of Python includes interfaces to many system calls and libraries, making it versatile for developers. However, it has been identified to have a security vulnerability that could lead to an infinite loop when parsing tarfiles, potentially affecting applications that rely on this functionality.
Vulnerability Detail
The vulnerability, identified as CVE-2025-8194, arises from an infinite loop in the CPython implementation when parsing tarfiles. This could lead to denial-of-service conditions, where an application may become unresponsive or crash due to excessive resource consumption. The issue is rooted in the way Python handles tarfile parsing, which can be exploited by maliciously crafted tar files, leading to significant operational disruptions.
How To Fix
Minimum fixed version
3.11.11-2.el9_6.2
This is the first release that contains the fix.
sudo dnf update python3.11Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, avoid processing untrusted tar files in your applications until the update is applied. If possible, implement input validation to check the integrity of tar files before parsing them.
Conclusion
In summary, Python 3.11 has a moderate security vulnerability (CVE-2025-8194) that can lead to denial-of-service conditions due to an infinite loop when parsing tarfiles. It is crucial to update to the patched version 3.11.11-2.el9_6.2 to mitigate this risk. Until then, implement workarounds to protect your applications.
See every vulnerability recorded for python3.11 →
FAQ
CVE-2025-8194 is a security vulnerability in Python 3.11 that causes an infinite loop when parsing tarfiles, potentially leading to denial-of-service conditions.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in real-time. Visit Vulert Scanner to check if your application is affected without needing to sign up.
Failing to update may leave your application vulnerable to denial-of-service attacks, which can disrupt services and affect user experience.
Yes, avoid processing untrusted tar files and implement input validation to ensure the integrity of files before parsing.
For more details, refer to the CVE page associated with CVE-2025-8194 and the advisory from AlmaLinux.
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