What is CVE-2026-52944?

CVE-2026-52944 is a security advisory published by Microsoft Security Response Center (MSRC) with Critical severity. ksmbd: fix FSCTL permission bypass by adding a permission check for FSCTL_SET_SPARSE

Which CVE IDs does CVE-2026-52944 cover?

CVE-2026-52944 covers the following CVE IDs: CVE-2026-52944. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-52944?

CVE-2026-52944 has a CVSS v3 base score of 9.8, published by Microsoft Security Response Center (MSRC).

CVE-2026-52944CriticalCVSS 9.8

ksmbd: fix FSCTL permission bypass by adding a permission check for FSCTL_SET_SPARSE

Vendor

Microsoft Security Response Center (MSRC)

Published

June 30, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-52944 →