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TI-2026-70048 Aliases CVE-2026-104112

Unreleased file descriptors in illumos nscd exhaust kernel memory

Priority LOW 29CWE-772Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-772.

Summary

illumos distributions prior to illumos-gate commit af810a72 are affected. The nscd door server procedure switcher() does not release file descriptors that are passed with a door call but not used by the request. This is a missing release of resources (CWE-772). A local user, including one in a non-global zone, can repeatedly pass descriptors to nscd, growing its descriptor table without bound and potentially making processes in all zones unresponsive.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the 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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00116 1st percentileScored 2026-11-07
Fix Fixed OmniOS (OmniOS): r151058w, r151056aw, r151054bw

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
OmniOSOmniOSany to before r151054; r151058 to before r151058w; r151056 to before r151056aw; r151054 to before r151054bwr151058w, r151056aw, r151054bwPatch availableCNA
  • OmniOS VendorOmniOS Affected any to before r151054; r151058 to before r151058w; r151056 to before r151056aw; r151054 to before r151054bw Fixed in r151058w, r151056aw, r151054bw Patch available CNA

Remediation

Update to illumos-gate commit af810a72 or later. OmniOS fixes are r151058w, r151056aw and r151054bw.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

  • Fix · CNA OmniOS (OmniOS) Fixed in r151058w, r151056aw, r151054bw

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    OmniOS r151054, r151054bw and 2 more versions

    7 records Highest priority Priority LOW 7 LOW

    Other records, highest priority first

    • TI-2026-70046 Reachable assertion in illumos bhyve lets guest panic hostPriority LOW 29
    • TI-2026-70051 Stack buffer overflow in illumos reparsed lets local users crash itPriority LOW 23
    • TI-2026-70050 NULL pointer dereference in illumos nwamd lets local users crash itPriority LOW 23
    Show all 7 records →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-09 Threatist record created from CVE-2026-104112
  2. 2026-11-06 Affected versions changed · Red Hat
  3. 2026-11-06 CVSS score added · Red Hat

References

Patch 1

Other 2

  • TI-2012-00210 The x86-64 kernel system-call functionality in Xen 4.1.2 and earlier, as used in Citrix… CVSS 2.0HIGH 7.2
  • TI-2021-19340 An issue was discovered in illumos before f859e7171bb5db34321e45585839c6c3200ebb90… CVSS 3.1MEDIUM 5.5
  • TI-2026-12978 SCTP needs to better-check INIT ACK chunk parameters CVSS 4.0CRITICAL 9.1
  • TI-2020-16788 An issue was discovered in illumos before 2020-10-22, as used in OmniOS before r151030by… CVSS 3.1CRITICAL 9.8
  • TI-2016-05624 Improper input validation in illumos osnet-incorporation CVSS 3.0HIGH 8.6
  • TI-2019-06998 An issue was discovered in Illumos in Nexenta NexentaStor 4.0.5 and 5.1.2, and other… CVSS 3.1HIGH 8.1
See all 15 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences