CVE-2026-68086: mm/khugepaged: write all dirty file folios when collapsing

CSIRTS triage

What

The khugepaged subsystem fails to write all dirty file folios when collapsing, potentially causing data corruption or loss.

Who is affected

Linux systems with transparent huge page collapsing enabled.

Urgency

Medium priority; not actively exploited but data integrity risk warrants timely patching.

Action

Update to a patched Linux kernel version containing the fix for CVE-2026-68086.

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

Details

Source

Microsoft Security Response Center (INTL · vendor-psirt · site)

Severity

medium — CVSS 6.6

Published

2026-08-11

Exploitation

Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68086

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-2026-680860.15% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 5% of all EPSS-scored CVEs.

Referenced CVEs

Same CVEs, other sources

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

• high[NEW] [high] Linux Kernel: Multiple vulnerabilitiescert-bund
• unknownCVE-2026-68086: In the Linux kernel, the following vulnerability has been resolved: mm/khugepaged: write all d…nvd

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