What is CVE-2025-43857?

CVE-2025-43857 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. net-imap rubygem vulnerable to possible DoS by memory exhaustion

Which CVE IDs does CVE-2025-43857 cover?

CVE-2025-43857 covers the following CVE IDs: CVE-2025-43857. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2025-43857?

CVE-2025-43857 has a CVSS v3 base score of 6.5, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2025-43857?

CVE-2025-43857 affects 2 products, including: azl3 ruby 3.3.5-6 on Azure Linux 3.0; cbl2 ruby 3.1.7-3 on CBL Mariner 2.0.

CVE-2025-43857HighCVSS 6.5

net-imap rubygem vulnerable to possible DoS by memory exhaustion

Vendor

Microsoft Security Response Center (MSRC)

Published

November 25, 2025

Last Modified

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🔗 CVE IDs covered (1)

CVE-2025-43857 →

🎯 Affected products2

azl3 ruby 3.3.5-6 on Azure Linux 3.0
cbl2 ruby 3.1.7-3 on CBL Mariner 2.0

🔗 References (1)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-43857