CVE-2019-19331

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2022-05-24. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 2%CVSS: 7.5Exploit: NoneExposed: 0

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

knot-resolver before version 4.3.0 is vulnerable to denial of service through high CPU utilization. DNS replies with very many resource records might be processed very inefficiently, in extreme cases taking even several CPU seconds for each such uncached message. For example, a few thousand A records can be squashed into one DNS message (limit is 64kB).

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
39(Track)
EG Risk 39/100SSVC: 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
Severity75% × 45%
Exploitation2% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
80.3%
KEV
Not listed

Published

December 16, 2019

Last Modified

November 21, 2024

References (6)

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 15× in last 7d / 46× 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 01:43 UTCEG score recompute
  2. 2026-07-22 22:23 UTCEG score recompute
  3. 2026-07-22 14:05 UTCEPSS rescore
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  8. 2026-07-20 00:18 UTCOSV refresh
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  1. 2026-07-08 15:11 UTCEPSS rescore
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  8. 2026-07-02 15:21 UTCOSV refresh
  9. 2026-07-01 15:03 UTCEPSS rescore
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  35. 2026-06-14 12:43 UTCOSV refresh
  36. 2026-06-13 22:58 UTCEPSS rescore
  37. 2026-06-12 23:09 UTCEPSS rescore
  38. 2026-06-11 13:58 UTCEPSS rescore
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  60. 2026-05-29 13:42 UTCEPSS rescore
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  62. 2026-05-27 13:38 UTCEPSS rescore
  63. 2026-05-27 10:26 UTCEG score recompute
  64. 2026-05-27 10:26 UTCGHSA enrichment
  65. 2026-05-26 13:42 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2019-19331?
CVE-2019-19331 is a high vulnerability published on December 16, 2019. knot-resolver before version 4.3.0 is vulnerable to denial of service through high CPU utilization. DNS replies with very many resource records might be processed very inefficiently, in extreme cases taking even several CPU seconds for each such uncached message. For example, a few thousand A…
When was CVE-2019-19331 disclosed?
CVE-2019-19331 was first published in the National Vulnerability Database on December 16, 2019, 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-2019-19331 actively exploited?
CVE-2019-19331 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 80.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2019-19331?
CVE-2019-19331 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2019-19331?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-19331, 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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