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expandvars vulnerability
About this tag
The expandvars vulnerability tag covers CVE-2025-6075, a security issue involving quadratic complexity in Python's os.path.expandvars function. This vulnerability affects Azure Linux distributions published by Microsoft, as identified in Microsoft's MSRC statement. Content on this tag provides advisory details, including Microsoft's official response, and practical defense steps for verifying and remediating exposure across Microsoft products and services. Discussions focus on the technical nature of the vulnerability, its impact on Azure Linux, and actionable guidance for IT professionals and security teams to assess and mitigate risks in enterprise environments.
This advisory explains CVE-2025-6075 (quadratic complexity in os.path.expandvars, what Microsoft’s MSRC statement means when it calls out Azure Linux, and practical steps for defenders to verify and remediate exposure across Microsoft products and services.
Executive summary — short answer...