CVE-2019-20392

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2022-05-24. NVD baseline CVSS 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS: 6.5Exploit: None knownExposed: 0

A fix is available — apply it.

An invalid memory access flaw is present in libyang before v1.0-r1 in the function resolve_feature_value() when an if-feature statement is used inside a list key node, and the feature used is not defined. Applications that use libyang to parse untrusted input yang files may crash.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
34(Track)
EG Risk 34/100SSVC: 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
Severity65% × 45%
Exploitation2% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
2%
EPSS %ILE
78%
KEV
Not listed

Published

January 22, 2020

Last Modified

November 21, 2024

References (10)

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatlibyang-0:1.0.184-1.el82021-05-18redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(4 across 4 ecosystems)
Debian:10(1)
PackageVulnerable rangeFixed inDependents
libyang0.16.105-1, 0.16.105-1+deb10u1, 0.16.105-2, 0.16.105-30.16.105+really1.0-0+deb10u1—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
libyang—1.0.176-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
libyang—1.0.176-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
libyang—1.0.176-1—

Weakness Classification(1)

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

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 8× in last 7d / 27× 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.

Showing the most recent 100 of 120 total refreshes for this CVE.

  1. 2026-08-21 06:14 UTCOSV refresh
  2. 2026-08-20 22:51 UTCEPSS rescore
  3. 2026-08-19 17:00 UTCEPSS rescore
  4. 2026-08-18 13:44 UTCEPSS rescore
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  14. 2026-08-05 20:51 UTCOSV refresh
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  1. 2026-07-23 14:15 UTCEPSS rescore
  2. 2026-07-23 01:43 UTCEG score recompute
  3. 2026-07-22 22:23 UTCEG score recompute
  4. 2026-07-22 14:05 UTCEPSS rescore
  5. 2026-07-21 15:22 UTCEPSS rescore
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  7. 2026-07-20 17:04 UTCEPSS rescore
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  9. 2026-07-19 21:18 UTCOSV refresh
  10. 2026-07-19 14:28 UTCEPSS rescore
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  19. 2026-07-13 22:27 UTCEPSS rescore
  20. 2026-07-12 05:43 UTCEPSS rescore
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  22. 2026-07-11 08:24 UTCEPSS rescore
  23. 2026-07-11 08:24 UTCEPSS rescore
  24. 2026-07-09 19:06 UTCEPSS rescore
  25. 2026-07-08 15:11 UTCEPSS rescore
  26. 2026-07-07 13:43 UTCEPSS rescore
  27. 2026-07-06 16:25 UTCEPSS rescore
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  29. 2026-07-06 02:20 UTCEPSS rescore
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  31. 2026-07-04 06:28 UTCEPSS rescore
  32. 2026-07-02 11:42 UTCOSV refresh
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  35. 2026-06-30 23:20 UTCEPSS rescore
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  40. 2026-06-27 03:06 UTCEPSS rescore
  41. 2026-06-25 13:47 UTCEPSS rescore
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  45. 2026-06-23 21:31 UTCEPSS rescore
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  47. 2026-06-22 14:23 UTCEPSS rescore
  48. 2026-06-21 14:54 UTCEPSS rescore
  49. 2026-06-21 14:54 UTCEPSS rescore
  50. 2026-06-21 01:57 UTCEPSS rescore
  51. 2026-06-21 01:57 UTCEPSS rescore
  52. 2026-06-19 19:23 UTCEPSS rescore
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  54. 2026-06-18 17:50 UTCEPSS rescore
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  58. 2026-06-14 23:15 UTCEPSS rescore
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  60. 2026-06-14 10:13 UTCOSV refresh
  61. 2026-06-13 22:58 UTCEPSS rescore
  62. 2026-06-12 23:09 UTCEPSS rescore
  63. 2026-06-11 13:58 UTCEPSS rescore
  64. 2026-06-10 22:16 UTCEPSS rescore
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  69. 2026-06-06 13:45 UTCEPSS rescore
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  73. 2026-06-05 06:08 UTCEPSS rescore
  74. 2026-06-05 06:08 UTCEPSS rescore
  75. 2026-06-04 13:10 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2019-20392?
CVE-2019-20392 is a medium vulnerability published on January 22, 2020. An invalid memory access flaw is present in libyang before v1.0-r1 in the function resolvefeaturevalue() when an if-feature statement is used inside a list key node, and the feature used is not defined. Applications that use libyang to parse untrusted input yang files may crash.
When was CVE-2019-20392 disclosed?
CVE-2019-20392 was first published in the National Vulnerability Database on January 22, 2020, 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-2019-20392 actively exploited?
CVE-2019-20392 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2% probability of exploitation in the next 30 days, which ranks it in the top 22.4% of all scored CVEs.
What is the CVSS score of CVE-2019-20392?
CVE-2019-20392 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2019-20392?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-20392, 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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