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CVE-2026-53017: f2fs: fix data loss caused by incorrect use of nat_entry flag

criticalCVSS 9.8CVE-2026-53017

CSIRTS triage

vendor: nullproduct: nullOther
What
Data loss can occur due to incorrect use of the nat_entry flag in f2fs.
Who is affected
Users of f2fs are affected by this issue.
Urgency
Critical urgency for remediation due to the high severity of potential data loss.
Action
Implement the fix for the incorrect use of the nat_entry flag.

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
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-2026-53017

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.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-53017coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

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

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