CVE-2026-104116 Missing authorization in illumos zonestatd allows local users to disrupt zonestat and enumerate running zones

What is CVE-2026-104116?

CVE-2026-104116 is a low-severity missing authorization vulnerability in OmniOS, published on 9 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A missing authorization check in the illumos zones statistics daemon (zonestatd) allows a local user in any zone to disrupt zonestat in other zones and to determine which zones are running. The zonestatd door server procedure, zsd_server() in usr/src/cmd/zonestat/zonestatd/zonestatd.c, handles the ZSD_CMD_NEW_ZONE command, which is intended to be sent by zoneadmd, without checking the caller's credentials. Because the zonestatd door is accessible to all users in every zone, an unprivileged user can send this command with an arbitrary zone ID, causing zonestatd to re-create its door file in that zone, so that new zonestat requests in that zone can fail while the file is replaced. The time taken to handle the command also reveals whether a given zone ID belongs to a running zone. The flaw has existed since 2010 (illumos-gate commit efd4c9b6), and affects any illumos distribution prior to illumos-gate commit 865b58d2.

Weakness: CWE-862

Which versions are affected by CVE-2026-104116?

How do I fix CVE-2026-104116?

No fix has been published for CVE-2026-104116 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2026-104116 being exploited?

There is no known exploitation of CVE-2026-104116 in the wild and no public exploit code.

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-83mv-pfw5-3x3p.