CVE-2026-80806: ext4: don't enable DAX on new encrypted files

mediumCVSS 4.1CVE-2026-80806

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 4.1
Published: 2026-09-08
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-80806

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-2026-808060.17% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-80806	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 ext4

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.

mediumCVE-2026-80808: ext4: stop retrying saturated xattr cache entriesmsrc · 2026-09-08
unknownCVE-2026-80808: In the Linux kernel, the following vulnerability has been resolved: ext4: stop retrying satura…nvd · 2026-09-04
unknownCVE-2026-80806: In the Linux kernel, the following vulnerability has been resolved: ext4: don't enable DAX on …nvd · 2026-09-04
unknownCVE-2026-74358: In the Linux kernel, the following vulnerability has been resolved: ext4: fix fast commit wait…nvd · 2026-08-15
unknownCVE-2026-74308: In the Linux kernel, the following vulnerability has been resolved: ext4: fix kernel BUG in ex…nvd · 2026-08-15
unknownCVE-2026-74307: In the Linux kernel, the following vulnerability has been resolved: ext4: validate donor file …nvd · 2026-08-15