What is CVE-2025-12977?

CVE-2025-12977 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. CVE-2025-12977

Which CVE IDs does CVE-2025-12977 cover?

CVE-2025-12977 covers the following CVE IDs: CVE-2025-12977. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2025-12977?

CVE-2025-12977 has a CVSS v3 base score of 8.3, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2025-12977?

CVE-2025-12977 affects 3 products, including: azl3 fluent-bit 3.1.10-2 on Azure Linux 3.0; azl3 fluent-bit 3.1.9-6 on Azure Linux 3.0; cbl2 fluent-bit 3.0.6-4 on CBL Mariner 2.0.

CVE-2025-12977HighCVSS 8.3

CVE-2025-12977

Vendor

Microsoft Security Response Center (MSRC)

Published

May 31, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2025-12977 →

🎯 Affected products3

azl3 fluent-bit 3.1.10-2 on Azure Linux 3.0
azl3 fluent-bit 3.1.9-6 on Azure Linux 3.0
cbl2 fluent-bit 3.0.6-4 on CBL Mariner 2.0

✅ Remediation

KBCBL-Mariner Releases (Security Update) — fixed build 3.1.10-3 KBCBL-Mariner Releases (Security Update) — fixed build 3.0.6-6

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-12977
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade