CVE-2026-63819: f2fs: fix to do sanity check on f2fs_get_node_folio_ra()

mediumCVSS 5CVE-2026-63819

CSIRTS triage

vendor: Linux product: f2fsOther

What: A sanity check is missing in f2fs_get_node_folio_ra(), which could lead to issues.
Who is affected: Deployments using the f2fs filesystem.
Urgency: Remediation is necessary as the severity is unknown and exploitation is not confirmed.
Action: Apply the patch for CVE-2026-63819.

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: medium — CVSS 5
Published: 2026-07-14
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-63819

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-2026-638190.12% 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-2026-63819	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

highCVE-2026-63819: In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to do sanity che…nvd

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.

unknownCVE-2026-63820: In the Linux kernel, the following vulnerability has been resolved: f2fs: fix missing read bio…nvd · 2026-07-19
highCVE-2026-63819: In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to do sanity che…nvd · 2026-07-19
highCVE-2026-63818: In the Linux kernel, the following vulnerability has been resolved: f2fs: validate orphan inod…nvd · 2026-07-19
highCVE-2026-63817: In the Linux kernel, the following vulnerability has been resolved: f2fs: validate compress ca…nvd · 2026-07-19
highCVE-2026-63816: In the Linux kernel, the following vulnerability has been resolved: f2fs: atomic: fix UAF issu…nvd · 2026-07-19
highCVE-2026-63815: In the Linux kernel, the following vulnerability has been resolved: f2fs: bound i_inline_xattr…nvd · 2026-07-19