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CVE-2026-53303: f2fs: protect extension_list reading with sb_lock in f2fs_sbi_show()

highCVSS 7.1CVE-2026-53303

CSIRTS triage

Other
What
The extension_list reading is now protected with sb_lock in f2fs_sbi_show().
Who is affected
Deployments using f2fs are affected.
Urgency
Remediation is high urgency due to the potential for data corruption.
Action
Update to the version that includes the sb_lock protection.

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

Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
high — CVSS 7.1
Published
2026-06-09
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-53303

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-2026-53303coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

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

Recent advisories for f2fs

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.

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