CVE-2019-6470

HIGHNVD 6.57.5▲
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2022-05-24. NVD baseline CVSS 6.5; sources differ by 1.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 9%CVSS: 6.5Exploit: None knownExposed: 0

A fix is available — apply it.

There had existed in one of the ISC BIND libraries a bug in a function that was used by dhcpd when operating in DHCPv6 mode. There was also a bug in dhcpd relating to the use of this function per its documentation, but the bug in the library function prevented this from causing any harm. All releases of dhcpd from ISC contain copies of this, and other, BIND libraries in combinations that have been tested prior to release and are known to not present issues like this. Some third-party packagers of ISC software have modified the dhcpd source, BIND source, or version matchup in ways that create the crash potential. Based on reports available to ISC, the crash probability is large and no analysis has been done on how, or even if, the probability can be manipulated by an attacker. Affects: Builds of dhcpd versions prior to version 4.4.1 when using BIND versions 9.11.2 or later, or BIND versions with specific bug fixes backported to them. ISC does not have access to comprehensive version lists for all repackagings of dhcpd that are vulnerable. In particular, builds from other vendors may also be affected. Operators are advised to consult their vendor documentation.

CVSS v3
6.5
EG Score
7.5(medium)
EG Risk
42(Track)
EG Risk 42/100SSVC: 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%
Exploitation9% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
9%
EPSS %ILE
95%
KEV
Not listed

Published

November 1, 2019

Last Modified

April 11, 2025

References (10)

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuisc-dhcp-server-ldap (4.3.5-3ubuntu9.1) @ cosmic2026-05-27ubuntu
redhatdhcp-12:4.3.6-34.el82019-11-05redhat
redhatdhcp-12:4.2.5-77.el72019-08-06redhat

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

(13 across 13 ecosystems)
Alpine:v3.11(1)
PackageVulnerable rangeFixed inDependents
dhcp—4.4.1-r0—
Alpine:v3.12(1)
PackageVulnerable rangeFixed inDependents
dhcp—4.4.1-r0—
Alpine:v3.13(1)
PackageVulnerable rangeFixed inDependents
dhcp—4.4.1-r0—
Alpine:v3.14(1)
PackageVulnerable rangeFixed inDependents
dhcp—4.4.1-r0—
Alpine:v3.15(1)
PackageVulnerable rangeFixed inDependents
dhcp—4.4.1-r0—
Alpine:v3.16(1)
PackageVulnerable rangeFixed inDependents
dhcp—4.4.1-r0—
Alpine:v3.17(1)
PackageVulnerable rangeFixed inDependents
dhcp—4.4.1-r0—
Alpine:v3.18(1)
PackageVulnerable rangeFixed inDependents
dhcp—4.4.1-r0—
Alpine:v3.19(1)
PackageVulnerable rangeFixed inDependents
dhcp—4.4.1-r0—
Alpine:v3.20(1)
PackageVulnerable rangeFixed inDependents
dhcp—4.4.1-r0—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
isc-dhcp—4.4.1-2—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
isc-dhcp—4.4.1-2—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
isc-dhcp—4.4.1-2—

All Vendor Advisories

(4)

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 4× in last 7d / 23× 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 118 total refreshes for this CVE.

  1. 2026-08-21 11:14 UTCOSV refresh
  2. 2026-08-19 17:00 UTCEPSS rescore
  3. 2026-08-18 13:44 UTCEPSS rescore
  4. 2026-08-15 01:26 UTCEPSS rescore
  5. 2026-08-13 21:57 UTCEPSS rescore
  6. 2026-08-12 13:47 UTCEPSS rescore
  7. 2026-08-09 13:43 UTCEPSS rescore
  8. 2026-08-08 16:33 UTCEPSS rescore
  9. 2026-08-07 16:23 UTCEPSS rescore
  10. 2026-08-05 23:24 UTCOSV refresh
  11. 2026-08-05 19:13 UTCEPSS rescore
  12. 2026-08-04 15:05 UTCEPSS rescore
  13. 2026-08-04 10:34 UTCEPSS rescore
  14. 2026-08-03 10:32 UTCEPSS rescore
  15. 2026-08-02 02:23 UTCEPSS rescore
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  17. 2026-07-30 16:24 UTCEPSS rescore
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  20. 2026-07-25 14:14 UTCEPSS rescore
  21. 2026-07-24 14:14 UTCEPSS rescore
  22. 2026-07-23 14:15 UTCEPSS rescore
  23. 2026-07-23 01:46 UTCEG score recompute
  24. 2026-07-22 22:28 UTCEG score recompute
  25. 2026-07-22 14:05 UTCEPSS rescore
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  1. 2026-07-21 15:22 UTCEPSS rescore
  2. 2026-07-21 15:22 UTCEPSS rescore
  3. 2026-07-20 17:04 UTCEPSS rescore
  4. 2026-07-20 02:46 UTCOSV refresh
  5. 2026-07-19 14:28 UTCEPSS rescore
  6. 2026-07-19 14:28 UTCEPSS rescore
  7. 2026-07-19 02:26 UTCEPSS rescore
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  9. 2026-07-18 10:02 UTCEPSS rescore
  10. 2026-07-16 16:59 UTCEPSS rescore
  11. 2026-07-16 16:59 UTCEPSS rescore
  12. 2026-07-15 16:55 UTCEPSS rescore
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  14. 2026-07-13 22:27 UTCEPSS rescore
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  16. 2026-07-13 06:10 UTCEPSS rescore
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  18. 2026-07-12 05:44 UTCEPSS rescore
  19. 2026-07-12 05:43 UTCEPSS rescore
  20. 2026-07-11 08:24 UTCEPSS rescore
  21. 2026-07-11 08:24 UTCEPSS rescore
  22. 2026-07-09 19:06 UTCEPSS rescore
  23. 2026-07-08 15:11 UTCEPSS rescore
  24. 2026-07-07 13:43 UTCEPSS rescore
  25. 2026-07-06 02:20 UTCEPSS rescore
  26. 2026-07-06 02:20 UTCEPSS rescore
  27. 2026-07-05 02:27 UTCEPSS rescore
  28. 2026-07-04 06:28 UTCEPSS rescore
  29. 2026-07-02 17:27 UTCOSV refresh
  30. 2026-07-01 15:03 UTCEPSS rescore
  31. 2026-07-01 15:03 UTCEPSS rescore
  32. 2026-06-30 23:20 UTCEPSS rescore
  33. 2026-06-28 14:04 UTCEPSS rescore
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  36. 2026-06-27 03:06 UTCEPSS rescore
  37. 2026-06-25 13:47 UTCEPSS rescore
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  39. 2026-06-24 14:03 UTCEPSS rescore
  40. 2026-06-24 14:03 UTCEPSS rescore
  41. 2026-06-23 21:31 UTCEPSS rescore
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  43. 2026-06-22 14:23 UTCEPSS rescore
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  45. 2026-06-21 14:54 UTCEPSS rescore
  46. 2026-06-21 14:54 UTCEPSS rescore
  47. 2026-06-18 17:50 UTCEPSS rescore
  48. 2026-06-18 17:50 UTCEPSS rescore
  49. 2026-06-17 17:50 UTCEPSS rescore
  50. 2026-06-16 17:50 UTCEPSS rescore
  51. 2026-06-15 17:46 UTCEPSS rescore
  52. 2026-06-14 23:15 UTCEPSS rescore
  53. 2026-06-14 23:15 UTCEPSS rescore
  54. 2026-06-14 15:43 UTCOSV refresh
  55. 2026-06-13 22:58 UTCEPSS rescore
  56. 2026-06-12 23:09 UTCEPSS rescore
  57. 2026-06-12 23:09 UTCEPSS rescore
  58. 2026-06-11 13:58 UTCEPSS rescore
  59. 2026-06-10 22:16 UTCEPSS rescore
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  61. 2026-06-10 13:19 UTCEPSS rescore
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  67. 2026-06-06 13:45 UTCEPSS rescore
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  70. 2026-06-05 06:08 UTCEPSS rescore
  71. 2026-06-04 13:10 UTCEPSS rescore
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  73. 2026-06-02 20:11 UTCEPSS rescore
  74. 2026-06-02 20:11 UTCEPSS rescore
  75. 2026-06-01 13:50 UTCEPSS rescore

Frequently asked(5)

What is CVE-2019-6470?
CVE-2019-6470 is a high vulnerability published on November 1, 2019. There had existed in one of the ISC BIND libraries a bug in a function that was used by dhcpd when operating in DHCPv6 mode. There was also a bug in dhcpd relating to the use of this function per its documentation, but the bug in the library function prevented this from causing any harm. All…
When was CVE-2019-6470 disclosed?
CVE-2019-6470 was first published in the National Vulnerability Database on November 1, 2019, with the most recent update on April 11, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2019-6470 actively exploited?
CVE-2019-6470 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 9% probability of exploitation in the next 30 days, which ranks it in the top 5.2% of all scored CVEs.
What is the CVSS score of CVE-2019-6470?
CVE-2019-6470 has a CVSS v3 base score of 6.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 7.5.
How do I remediate CVE-2019-6470?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-6470, 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.

Dependency Blast Radius

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