CVE-2020-37127

CRITICALNVD 5.59.8▲
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory published 2026-02-05. NVD baseline CVSS 5.5; sources differ by 4.3.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
9.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: Elevated riskExposed: 0

A fix is available — apply it.

Dnsmasq-utils 2.79-1 contains a buffer overflow vulnerability in the dhcp_release utility that allows attackers to cause a denial of service by supplying excessive input. Attackers can trigger a core dump and terminate the dhcp_release process by sending a crafted input string longer than 16 characters.

CVSS v3
5.5
EG Score
9.8(medium)
EG Risk
60(Track)
EG Risk 60/100SSVC: 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
Severity98% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
9%
KEV
Not listed

Published

February 5, 2026

Last Modified

June 17, 2026

Advisory Details (3)

Auto-updated Aug 9, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

dnsmasq-utils 2.79-1 - 'dhcp_release' Denial of Service | Advisories | VulnCheck

https://www.vulncheck.com/advisories/dnsmasq-utils-dhcprelease-denial-of-service
generic🟡 PoC Available

dnsmasq-utils 2.79-1 - 'dhcp_release' Denial of Service (PoC) - Linux dos Exploit

https://www.exploit-db.com/exploits/48301
generic

2.79-1 : dnsmasq package : Ubuntu

https://launchpad.net/ubuntu/+source/dnsmasq/2.79-1

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntudnsmasq-utils (2.68-1ubuntu0.2+esm6) @ trusty2026-06-12ubuntu

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:11(1)
PackageVulnerable rangeFixed inDependents
dnsmasq—2.80-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
dnsmasq—2.80-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
dnsmasq—2.80-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
dnsmasq—2.80-1—

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 6× in last 7d / 22× 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 215 total refreshes for this CVE.

  1. 2026-09-19 15:37 UTCEPSS rescore
  2. 2026-09-18 19:23 UTCEPSS rescore
  3. 2026-09-17 19:22 UTCEPSS rescore
  4. 2026-09-16 14:04 UTCEPSS rescore
  5. 2026-09-15 03:06 UTCEPSS rescore
  6. 2026-09-13 16:43 UTCEPSS rescore
  7. 2026-09-12 14:57 UTCEPSS rescore
  8. 2026-09-11 09:32 UTCEPSS rescore
  9. 2026-09-08 21:56 UTCEPSS rescore
  10. 2026-09-07 15:57 UTCEPSS rescore
  11. 2026-09-06 13:44 UTCEPSS rescore
  12. 2026-09-05 15:24 UTCEPSS rescore
  13. 2026-09-04 13:57 UTCEPSS rescore
  14. 2026-09-04 05:03 UTCEPSS rescore
  15. 2026-09-02 14:08 UTCEPSS rescore
  16. 2026-09-01 03:32 UTCEPSS rescore
  17. 2026-08-30 19:14 UTCEPSS rescore
  18. 2026-08-30 01:18 UTCEPSS rescore
  19. 2026-08-27 14:21 UTCEPSS rescore
  20. 2026-08-26 14:42 UTCEPSS rescore
  21. 2026-08-25 13:45 UTCEPSS rescore
  22. 2026-08-21 23:45 UTCEPSS rescore
  23. 2026-08-19 17:00 UTCEPSS rescore
  24. 2026-08-18 13:44 UTCEPSS rescore
  25. 2026-08-17 13:43 UTCEPSS rescore
Show 75 more
  1. 2026-08-16 14:52 UTCEPSS rescore
  2. 2026-08-16 02:11 UTCEPSS rescore
  3. 2026-08-15 01:26 UTCEPSS rescore
  4. 2026-08-14 22:53 UTCVendor advisory
  5. 2026-08-14 22:53 UTCGHSA enrichment
  6. 2026-08-14 15:09 UTCVendor advisory
  7. 2026-08-14 15:09 UTCGHSA enrichment
  8. 2026-08-14 11:06 UTCEG score recompute
  9. 2026-08-14 11:06 UTCVendor advisory
  10. 2026-08-14 11:06 UTCGHSA enrichment
  11. 2026-08-13 21:57 UTCEPSS rescore
  12. 2026-08-13 03:27 UTCEG score recompute
  13. 2026-08-13 03:27 UTCVendor advisory
  14. 2026-08-13 03:27 UTCGHSA enrichment
  15. 2026-08-12 13:47 UTCEPSS rescore
  16. 2026-08-10 09:55 UTCVendor advisory
  17. 2026-08-10 09:55 UTCGHSA enrichment
  18. 2026-08-10 04:02 UTCVendor advisory
  19. 2026-08-10 04:02 UTCGHSA enrichment
  20. 2026-08-09 23:51 UTCVendor advisory
  21. 2026-08-09 23:51 UTCGHSA enrichment
  22. 2026-08-09 19:48 UTCVendor advisory
  23. 2026-08-09 19:48 UTCGHSA enrichment
  24. 2026-08-09 15:46 UTCEG score recompute
  25. 2026-08-09 15:46 UTCVendor advisory
  26. 2026-08-09 15:46 UTCGHSA enrichment
  27. 2026-08-09 13:43 UTCEPSS rescore
  28. 2026-08-08 16:33 UTCEPSS rescore
  29. 2026-08-08 06:48 UTCVendor advisory
  30. 2026-08-08 06:48 UTCGHSA enrichment
  31. 2026-08-08 02:46 UTCVendor advisory
  32. 2026-08-08 02:46 UTCGHSA enrichment
  33. 2026-08-07 22:43 UTCEG score recompute
  34. 2026-08-07 22:43 UTCVendor advisory
  35. 2026-08-07 22:43 UTCGHSA enrichment
  36. 2026-08-07 16:23 UTCEPSS rescore
  37. 2026-08-06 13:43 UTCEPSS rescore
  38. 2026-08-06 08:32 UTCVendor advisory
  39. 2026-08-06 08:32 UTCGHSA enrichment
  40. 2026-08-06 04:20 UTCEG score recompute
  41. 2026-08-06 04:20 UTCVendor advisory
  42. 2026-08-06 04:20 UTCGHSA enrichment
  43. 2026-08-04 15:06 UTCEPSS rescore
  44. 2026-08-04 10:34 UTCEPSS rescore
  45. 2026-08-03 01:55 UTCVendor advisory
  46. 2026-08-03 01:55 UTCGHSA enrichment
  47. 2026-08-02 21:22 UTCEG score recompute
  48. 2026-08-02 21:22 UTCVendor advisory
  49. 2026-08-02 21:22 UTCGHSA enrichment
  50. 2026-08-02 02:23 UTCEPSS rescore
  51. 2026-08-01 04:12 UTCEPSS rescore
  52. 2026-07-30 16:25 UTCEPSS rescore
  53. 2026-07-30 01:27 UTCEPSS rescore
  54. 2026-07-28 15:33 UTCEPSS rescore
  55. 2026-07-26 14:51 UTCEPSS rescore
  56. 2026-07-25 14:15 UTCEPSS rescore
  57. 2026-07-24 14:14 UTCEPSS rescore
  58. 2026-07-23 14:15 UTCEPSS rescore
  59. 2026-07-23 14:15 UTCEPSS rescore
  60. 2026-07-23 01:53 UTCEG score recompute
  61. 2026-07-22 22:39 UTCEG score recompute
  62. 2026-07-22 14:05 UTCEPSS rescore
  63. 2026-07-21 15:22 UTCEPSS rescore
  64. 2026-07-21 15:22 UTCEPSS rescore
  65. 2026-07-20 17:04 UTCEPSS rescore
  66. 2026-07-20 17:04 UTCEPSS rescore
  67. 2026-07-19 14:28 UTCEPSS rescore
  68. 2026-07-19 14:28 UTCEPSS rescore
  69. 2026-07-19 02:26 UTCEPSS rescore
  70. 2026-07-19 02:26 UTCEPSS rescore
  71. 2026-07-16 16:59 UTCEPSS rescore
  72. 2026-07-15 16:55 UTCEPSS rescore
  73. 2026-07-15 16:55 UTCEPSS rescore
  74. 2026-07-15 01:57 UTCEPSS rescore
  75. 2026-07-13 22:27 UTCEPSS rescore

Frequently asked(5)

What is CVE-2020-37127?
CVE-2020-37127 is a critical vulnerability published on February 5, 2026. Dnsmasq-utils 2.79-1 contains a buffer overflow vulnerability in the dhcprelease utility that allows attackers to cause a denial of service by supplying excessive input. Attackers can trigger a core dump and terminate the dhcprelease process by sending a crafted input string longer than 16…
When was CVE-2020-37127 disclosed?
CVE-2020-37127 was first published in the National Vulnerability Database on February 5, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-37127 actively exploited?
CVE-2020-37127 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 91.2% of all scored CVEs.
What is the CVSS score of CVE-2020-37127?
CVE-2020-37127 has a CVSS v3 base score of 5.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.8.
How do I remediate CVE-2020-37127?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-37127, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2020-37127

Explore →

Is Your Infrastructure Affected by CVE-2020-37127?

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

Start Free Scan →Browse All CVEs