Description (CNA)
A missing release of resources in the illumos name service cache daemon (nscd) allows a local user to exhaust kernel memory. The nscd door server procedure, switcher() in usr/src/cmd/nscd/nscd_frontend.c, does not close file descriptors that are passed with a door call but not used by the request, and the main nscd door at /var/run/name_service_door accepts passed descriptors from any user in its zone. Because nscd also runs with an unlimited file descriptor limit, an unprivileged local user, including one in a non-global zone, can repeatedly pass a descriptor to its zone's nscd in a door_call() loop, causing the file descriptor table of nscd to grow without bound in kernel memory. This causes a denial of service of nscd and can render processes in all zones on the host unresponsive. The flaw has existed since 2006 (illumos-gate commit cb5caa98), and affects any illumos distribution prior to illumos-gate commit af810a72.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| illumos / illumos-gate | affected cb5caa98562cf06753163f558cbcfe30b8f4673a before af810a72c09944e884ec695e8dbf1702a4f424ae |
| OmniOS / OmniOS | affected any before r151054; affected r151058 before r151058w; affected r151056 before r151056aw; affected r151054 before r151054bw |
CWE
CWE-772
References
- https://illumos.topicbox.com/groups/developer/T3b859664594b7762/cve-2026-104112-to-cve-2026-104117-denial-of-service-and-missing-authorization-in-door-servers
- https://illumos.org/issues/18494
- https://github.com/illumos/illumos-gate/commit/af810a72c09944e884ec695e8dbf1702a4f424ae
ADP enrichment
No English description supplied.
No references supplied.