What is CVE-2025-40307?

CVE-2025-40307 is a security advisory published by Microsoft Security Response Center (MSRC) with Medium severity. exfat: validate cluster allocation bits of the allocation bitmap

Which CVE IDs does CVE-2025-40307 cover?

CVE-2025-40307 covers the following CVE IDs: CVE-2025-40307. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2025-40307?

CVE-2025-40307 has a CVSS v3 base score of 5.5, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2025-40307?

CVE-2025-40307 affects 1 product, including: azl3 kernel 6.6.117.1-1 on Azure Linux 3.0.

CVE-2025-40307MediumCVSS 5.5

exfat: validate cluster allocation bits of the allocation bitmap

Vendor

Microsoft Security Response Center (MSRC)

Published

December 9, 2025

Last Modified

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🔗 CVE IDs covered (1)

CVE-2025-40307 →

🎯 Affected products1

azl3 kernel 6.6.117.1-1 on Azure Linux 3.0

🔗 References (1)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-40307