CVE-2026-53168: fuse: reject fuse_notify() pagecache ops on directories

highCVSS 7CVE-2026-53168

CSIRTS triage

vendor: Linux product: fuseOther

What: Rejects fuse_notify() pagecache operations on directories.
Who is affected: Deployments using FUSE in Linux.
Urgency: Remediation is important due to the high severity rating.
Action: Update to the latest kernel version that addresses this issue.

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
Published: 2026-06-09
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-53168

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-2026-531680.12% 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-2026-53168	coverage & exploitation status	NVD · CVE.org

Recent advisories for fuse

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-2026-53311: In the Linux kernel, the following vulnerability has been resolved: fuse: fix uninit-value in …nvd · 2026-06-26
highCVE-2026-53167: fuse: limit FUSE_NOTIFY_RETRIEVE to uptodate foliosmsrc · 2026-06-09