What is CVE-2025-61661?

CVE-2025-61661 is a security advisory published by Microsoft Security Response Center (MSRC) with Medium severity. Grub2: grub2: out-of-bounds write via malicious usb device

Which CVE IDs does CVE-2025-61661 cover?

CVE-2025-61661 covers the following CVE IDs: CVE-2025-61661. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2025-61661?

CVE-2025-61661 has a CVSS v3 base score of 4.8, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2025-61661?

CVE-2025-61661 affects 4 products, including: azl3 grub2 2.06-25 on Azure Linux 3.0; azl3 grub2 2.06-26 on Azure Linux 3.0; cbl2 grub2 2.06-15 on CBL Mariner 2.0; cbl2 grub2 2.06-16 on CBL Mariner 2.0.

CVE-2025-61661MediumCVSS 4.8

Grub2: grub2: out-of-bounds write via malicious usb device

Vendor

Microsoft Security Response Center (MSRC)

Published

May 31, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2025-61661 →

🎯 Affected products4

azl3 grub2 2.06-25 on Azure Linux 3.0
azl3 grub2 2.06-26 on Azure Linux 3.0
cbl2 grub2 2.06-15 on CBL Mariner 2.0
cbl2 grub2 2.06-16 on CBL Mariner 2.0

✅ Remediation

KBCBL-Mariner Releases (Security Update) — fixed build 2.06-16 KBCBL-Mariner Releases (Security Update) — fixed build 2.06-26

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-61661
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade