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-2026-530270.12% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all EPSS-scored CVEs.

Referenced CVEs

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

Same CVEs, other sources

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

unknownMultiple vulnerabilities in Ubuntu Linux kernel (August 21, 2026)cert-fr-avis
unknownUSN-8664-1: Linux kernel (NVIDIA BaseOS) vulnerabilitiesubuntu
unknownUSN-8663-1: Linux kernel (NVIDIA) vulnerabilitiesubuntu
unknownMultiple vulnerabilities in Debian LTS Linux kernel (August 14, 2026)cert-fr-avis
highUSN-8618-1: Linux kernel vulnerabilitiesubuntu
highUSN-8603-1: Linux kernel (Azure) vulnerabilitiesubuntu
unknownMultiple vulnerabilities in Debian Linux kernel (July 24, 2026)cert-fr-avis
highUSN-8593-1: Linux kernel vulnerabilitiesubuntu
unknownDSA-6393-1 linux - security updatedebian
highUSN-8569-1: Linux kernel (HWE) vulnerabilitiesubuntu
highUSN-8568-1: Linux kernel (OEM) vulnerabilitiesubuntu
highUSN-8566-1: Linux kernel vulnerabilitiesubuntu

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-2026-72478: In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: add bounds check…nvd · 2026-08-15
criticalCVE-2026-72477: In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: call _ntfs_bad_i…nvd · 2026-08-15
highCVE-2026-72471: In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: prevent potentia…nvd · 2026-08-15
highCVE-2026-72470: In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: resize log->one_…nvd · 2026-08-15
highCVE-2026-72197: In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: bound DeleteInde…nvd · 2026-08-15
highCVE-2026-72196: In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: bound copy_lcns …nvd · 2026-08-15