CVE WatchAug 27, 2026

CVE-2026-79619

On Linux, several OpenZFS ioctl authorization checks accept a capability held only within a user-created, unprivileged namespace as equivale

CVSS

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No CVSS

EPSS

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KEV

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Exploit Today

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0-100

Published: Aug 26, 2026 · Last modified: Aug 27, 2026 · CWE-863

EPSS · 30d

Not enough EPSS history yet.

Technical description

On Linux, several OpenZFS ioctl authorization checks accept a capability held only within a user-created, unprivileged namespace as equivalent to real host privilege, allowing an unprivileged local user to perform operations that should require root. Affected operations include pool-administrative operations (eg create, import, destroy), pool event log access (zpool events) and fault injection (zinject). Exploiting the problem requires only that the local user is permitted to open /dev/zfs (governed by local device permissions) and that the kernel permits unprivileged user namespace creation. No prior access to the target pool or its underlying devices is needed.

Official references

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