CVE-2018-16438

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2022-05-14. NVD baseline CVSS 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
8.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 2%CVSS: 8.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

An issue was discovered in the HDF HDF5 1.8.20 library. There is an out of bounds read in H5L_extern_query at H5Lexternal.c.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
45(Track)
EG Risk 45/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity88% × 45%
Exploitation2% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
75.7%
KEV
Not listed

Published

September 4, 2018

Last Modified

November 21, 2024

References (2)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 45× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

  1. 2026-07-23 14:15 UTCEPSS rescore
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  3. 2026-07-23 01:34 UTCEG score recompute
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  7. 2026-07-21 06:47 UTCOSV refresh
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  5. 2026-07-04 01:56 UTCOSV refresh
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  65. 2026-05-28 03:32 UTCEG score recompute
  66. 2026-05-28 03:32 UTCGHSA enrichment
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Frequently asked(5)

What is CVE-2018-16438?
CVE-2018-16438 is a high vulnerability published on September 4, 2018. An issue was discovered in the HDF HDF5 1.8.20 library. There is an out of bounds read in H5Lexternquery at H5Lexternal.c.
When was CVE-2018-16438 disclosed?
CVE-2018-16438 was first published in the National Vulnerability Database on September 4, 2018, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2018-16438 actively exploited?
CVE-2018-16438 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 75.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2018-16438?
CVE-2018-16438 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2018-16438?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-16438, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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