Linuxsecurity

Critical DoS Vulnerability in Python 3.9 for Fedora 42 and 43

First seen 24 Jan 2026, 10:48 UTC • Linuxsecurity

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A critical Denial of Service vulnerability, identified as CVE-2025-12084, affects the Python 3.9 package used in Fedora 42 and 43. This vulnerability allows developers to test their code against an older version of Python, but it requires immediate attention due to its potential impact on applications. Users are advised to consider other distributions for running Python 3.9.

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Critical DoS Vulnerability in Python 3.9 for Fedora 42 and 43

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