What is CVE-2025-66038?

CVE-2025-66038 is a security advisory published by Microsoft Security Response Center (MSRC) with Low severity. OpenSC: `sc_compacttlv_find_tag` can return out-of-bounds pointers

Which CVE IDs does CVE-2025-66038 cover?

CVE-2025-66038 covers the following CVE IDs: CVE-2025-66038. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2025-66038?

CVE-2025-66038 has a CVSS v3 base score of 3.9, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2025-66038?

CVE-2025-66038 affects 3 products, including: azl3 opensc 0.26.1-1 on Azure Linux 3.0; azl3 opensc 0.27.1-1 on Azure Linux 3.0; azl3 opensc 0.27.1-2 on Azure Linux 3.0.

CVE-2025-66038LowCVSS 3.9

OpenSC: `sc_compacttlv_find_tag` can return out-of-bounds pointers

Vendor

Microsoft Security Response Center (MSRC)

Published

May 31, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2025-66038 →

🎯 Affected products3

azl3 opensc 0.26.1-1 on Azure Linux 3.0
azl3 opensc 0.27.1-1 on Azure Linux 3.0
azl3 opensc 0.27.1-2 on Azure Linux 3.0

✅ Remediation

KBRelease Notes (Security Update) — fixed build 0.27.1-1 KBCBL-Mariner Releases (Security Update) — fixed build 0.27.1-1

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-66038
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade