What is CVE-2026-63833?

CVE-2026-63833 is a security advisory published by Microsoft Security Response Center (MSRC) with Critical severity. ntfs3: reject direct userspace writes to reserved $LX* xattrs

Which CVE IDs does CVE-2026-63833 cover?

CVE-2026-63833 covers the following CVE IDs: CVE-2026-63833. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-63833?

CVE-2026-63833 has a CVSS v3 base score of 9.8, published by Microsoft Security Response Center (MSRC).

CVE-2026-63833CriticalCVSS 9.8

ntfs3: reject direct userspace writes to reserved $LX* xattrs

Vendor

Microsoft Security Response Center (MSRC)

Published

July 23, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2026-63833 →