CVE-2026-104112

MEDIUMPre-NVD 6.86.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This medium-severity CVE scores 6.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.1% (1st percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Trending — 3 sources updated this week

Also known asEUVD-2026-95801 (ENISA EUVD) · GHSA-77hg-3j5h-xvf6 (GitHub Security Advisories)Source: ENISA EUVD

6.8EG
EchelonGraph verdictMonitorThe upstream fix is not in a release yet: until the release ships, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule, then apply it (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 6.8Exploit: None knownExposed services: Not assessed

An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.

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.

CVSS v3
6.8
EG Score
6.8MEDIUMmedium confidence
EG Risk
31
EG Risk 31/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity68% × 45%
Impact severity (EG Severity): CVSS 6.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.1% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: An upstream fix is merged but not yet in a tagged release. Until the release ships, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule, then apply it.
EPSS PROB
0.1%
EPSS %ILE
1st
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (6.8): severity, escalated by confirmed exploitation. This CVE's 6.8 is its impact severity (EG Severity), not escalated.

EG Severity
6.8 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
0.1% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-28). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

An upstream fix is merged but not yet in a tagged release. Until the release ships, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule, then apply it.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

October 9, 2026

Last Modified

October 9, 2026

Advisory Details (3)

Auto-updated Oct 9, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
GitHub commit

commit af810a72c099 (illumos/illumos-gate)

Fix landed in illumos/illumos-gate commit af810a72c099 — awaiting tagged release

https://github.com/illumos/illumos-gate/commit/af810a72c09944e884ec695e8dbf1702a4f424ae
Web page

Bug #18494: nscd: unbounded file descriptor allocation - illumos gate - illumos

https://illumos.org/issues/18494

Vendor Advisories for CVE-2026-104112(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 40× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

  1. 2026-11-03 16:46 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  2. 2026-11-02 16:43 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  3. 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  4. 2026-10-31 16:31 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  5. 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  6. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  7. 2026-10-29 14:51 UTCEG score recompute
  8. 2026-10-29 14:51 UTCGHSA enrichmentGHSA-77hg-3j5h-xvf6
  9. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  10. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  11. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  12. 2026-10-25 14:56 UTCEG score recompute
  13. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  14. 2026-10-23 09:17 UTCEG score recompute
  15. 2026-10-23 09:17 UTCGHSA enrichmentGHSA-77hg-3j5h-xvf6
  16. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  17. 2026-10-21 16:31 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  18. 2026-10-20 16:31 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  19. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  20. 2026-10-18 05:09 UTCEG score recompute
  21. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  22. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  23. 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  24. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  25. 2026-10-12 16:40 UTCEG score recompute
Show 15 more
  1. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  2. 2026-10-11 20:35 UTCGHSA enrichmentGHSA-77hg-3j5h-xvf6
  3. 2026-10-11 20:15 UTCEG score recompute
  4. 2026-10-11 18:27 UTCEG score recompute
  5. 2026-10-11 15:01 UTCEG score recompute
  6. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  7. 2026-10-10 19:06 UTCGHSA enrichmentGHSA-77hg-3j5h-xvf6
  8. 2026-10-09 17:35 UTCEG score recompute
  9. 2026-10-09 17:34 UTCGHSA enrichmentGHSA-77hg-3j5h-xvf6
  10. 2026-10-09 16:54 UTCEG score recompute
  11. 2026-10-09 16:53 UTCGHSA enrichmentGHSA-77hg-3j5h-xvf6
  12. 2026-10-09 15:32 UTCEG score recompute
  13. 2026-10-09 15:32 UTCGHSA enrichmentGHSA-77hg-3j5h-xvf6
  14. 2026-10-09 14:29 UTCEG score recomputeFirst assessed: 6.8 MEDIUM
  15. 2026-10-09 14:28 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-104112?
CVE-2026-104112 is a medium-severity vulnerability; its CVE record was published on October 9, 2026. 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,…
When was the CVE record for CVE-2026-104112 published?
The CVE record for CVE-2026-104112 was published on October 9, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 9, 2026; the record at its source may have been updated since.
Is CVE-2026-104112 actively exploited?
CVE-2026-104112 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (1st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-104112?
CVE-2026-104112 has a CVSS base score of 6.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-104112?
An upstream fix for CVE-2026-104112 has been merged but is not yet in a tagged release. Until it ships, restrict network exposure of the affected system or apply the vendor's mitigation, then update to the release that contains the fix. The vendor advisories EchelonGraph has for CVE-2026-104112 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-104112

Explore →

Is Your Infrastructure Affected by CVE-2026-104112?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.