CVE-2026-104116: Illumos Illumos-Gate

Low severity, CVSS 1.9. EPSS: 0.1% chance of exploitation in the next 30 days.

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.

Affected products

• Illumos Illumos-Gate
• Omnios Omnios: from r151058, before r151058w (fixed in r151058w); from r151056, before r151056aw (fixed in r151056aw); from r151054, before r151054bw (fixed in r151054bw)

Published 2026-10-09. Last modified 2026-10-09.