{"id":"CVE-2026-104112","title":"A missing release of resources in the illumos name service cache daemon (nscd) allows a local user to exhaust kernel memory","summary":"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 …","severity":"medium","cwe":["CWE-772"],"published":"2026-10-09","updated":"2026-10-09","sourceUpdated":"2026-10-09T17:16:44.340","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-104112","references":[{"url":"https://github.com/illumos/illumos-gate/commit/af810a72c09944e884ec695e8dbf1702a4f424ae","label":"0ca53633-f0b5-4853-ba72-e0a2e62000d0"},{"url":"https://illumos.org/issues/18494","label":"0ca53633-f0b5-4853-ba72-e0a2e62000d0"},{"url":"https://illumos.topicbox.com/groups/developer/T3b859664594b7762/cve-2026-104112-to-cve-2026-104117-denial-of-service-and-missing-authorization-in-door-servers","label":"0ca53633-f0b5-4853-ba72-e0a2e62000d0"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-10-09T16:02:33.374Z","epss":0.00116,"epssPercentile":0.01604,"vendor":"illumos","product":"SUNWcs","affected":["SUNWcs >= cb5caa98562cf06753163f558cbcfe30b8f4673a < af810a72c09944e884ec695e8dbf1702a4f424ae","OmniOS >= any < r151054","OmniOS >= r151058 < r151058w","OmniOS >= r151056 < r151056aw","OmniOS >= r151054 < r151054bw"],"cvss":6.8,"cvssVector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:P","ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-09T16:15:18.136992Z"},"cvssSource":"cna","slug":"CVE-2026-104112","body":"## Overview\n\nA 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":37,"depthScoreParts":{"impact":37.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":220597,"id":"CVE-2026-104112","ts":1792022828896,"field":"cvss","old":null,"new":"6.8"},{"seq":220596,"id":"CVE-2026-104112","ts":1792022828896,"field":"severity","old":"none","new":"medium"}]}