CVE-2026-53027: fs/ntfs3: fix missing run load for vcn0 in attr_data_get_block_locked()

criticalCVSS 9.8CVE-2026-53027

CSIRTS triage

Other

What: The vulnerability involves a missing run load for vcn0 in the attr_data_get_block_locked function.
Who is affected: Deployments using the fs/ntfs3 filesystem.
Urgency: Remediation is critical urgency due to the high severity rating.
Action: Apply the latest patches for fs/ntfs3.

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

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: critical — CVSS 9.8
Published: 2026-06-09
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-53027

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-2026-530270.15% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 5% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-53027	coverage & exploitation status	NVD · CVE.org

Recent advisories for fs/ntfs3

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-2026-53023: fs/ntfs3: terminate the cached volume label after UTF-8 conversionmsrc · 2026-06-09