CVE-2026-64600: xfs: resample the data fork mapping after cycling ILOCK

highpublic exploitCVSS 7.8CVE-2026-64600

CSIRTS triage

vendor: xfs product: xfsOther

What: A vulnerability exists in xfs related to resampling the data fork mapping after cycling ILOCK.
Who is affected: Deployments using xfs are affected.
Urgency: Remediation is urgent due to the high severity rating of 7.8.
Action: Apply the latest security patch to address the vulnerability.

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: high — CVSS 7.8
Published: 2026-07-14
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-64600

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-2026-646000.49% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 39% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-64600	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

Recent advisories for xfs

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-2026-64357: In the Linux kernel, the following vulnerability has been resolved: xfs: fix exchmaps reservat…nvd · 2026-07-25
unknownCVE-2026-64356: In the Linux kernel, the following vulnerability has been resolved: xfs: fix memory leak in xf…nvd · 2026-07-25
unknownCVE-2026-64256: In the Linux kernel, the following vulnerability has been resolved: xfs: don't wrap around quo…nvd · 2026-07-25
highCVE-2026-64600: In the Linux kernel, the following vulnerability has been resolved: xfs: resample the data for…nvd · 2026-07-23
unknownCVE-2026-64187: In the Linux kernel, the following vulnerability has been resolved: xfs: fail recovery on a co…nvd · 2026-07-20
mediumCVE-2026-64187: xfs: fail recovery on a committed log item with no regionsmsrc · 2026-07-14