MEDIUM 5.3 Microsoft

CVE-2025-4565

Unbounded recursion in Python Protobuf

Microsoft Security Update 2025-Jun: Unbounded recursion in Python Protobuf

Affected Products

cm2 protobuf 3.17.3-4 on CBL Mariner 2.0
azl3 protobuf 25.3-5 on Azure Linux 3.0
cbl2 protobuf 3.17.3-4 on CBL-Mariner 2.0
cbl2 protobuf 3.17.3-4 on CBL Mariner 2.0

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-4565
https://nvd.nist.gov/vuln/detail/CVE-2025-4565

Published: 2025-06-10 · Source: Microsoft · Feed updated: 2026-09-30

This medium severity vulnerability with a CVSS score of 5.3 was published on 2025-06-10 via Microsoft. Affected: cm2 protobuf 3.17.3-4 on CBL Mariner 2.0, azl3 protobuf 25.3-5 on Azure Linux 3.0, cbl2 protobuf 3.17.3-4 on CBL-Mariner 2.0 and 1 more.

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