CVE-2026-63793: ntfs: serialize volume label accesses

highCVSS 7.5CVE-2026-63793

CSIRTS triage

vendor: Linux product: ntfsOther

What: Volume label accesses are not serialized, which could lead to race conditions.
Who is affected: Deployments using the NTFS filesystem.
Urgency: Remediation is necessary as the severity is unknown and exploitation is not confirmed.
Action: Apply the patch for CVE-2026-63793.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: high — CVSS 7.5
Published: 2026-07-14
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-63793

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-637930.12% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-63793	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for ntfs

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

highCVE-2026-64532: In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: bound NTFS_DE vi…nvd · 2026-07-27
highCVE-2026-64431: In the Linux kernel, the following vulnerability has been resolved: ntfs: avoid calling post_w…nvd · 2026-07-25
unknownCVE-2026-15788: BuildKit's cache mount source= selector on Windows Container on Windows (WCOW) workers does no…nvd · 2026-07-20
highCVE-2026-63793: In the Linux kernel, the following vulnerability has been resolved: ntfs: serialize volume lab…nvd · 2026-07-19
unknownUSN-8554-1: NTFS-3G vulnerabilitiesubuntu · 2026-07-16
unknownDSA-6389-1 ntfs-3g - security updatedebian · 2026-07-15