CVE-2017-16820

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-14. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 4%CVSS: 9.8Exploit: NoneExposed: 0

A fix is available — apply it.

The csnmp_read_table function in snmp.c in the SNMP plugin in collectd before 5.6.3 is susceptible to a double free in a certain error case, which could lead to a crash (or potentially have other impact).

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
89.3%
KEV
Not listed

Published

November 14, 2017

Last Modified

May 13, 2026

Advisory Details (10)

Auto-updated May 18, 2026
Patch available. Sources: redhat.
generic

collectd: Multiple vulnerabilities (GLSA 201803-10) — Gentoo security

https://security.gentoo.org/glsa/201803-10
generic

Release 5.6.3 · collectd/collectd · GitHub

https://github.com/collectd/collectd/releases/tag/collectd-5.6.3
generic

snmp plugin: double free or heap corruption · Issue #2291 · collectd/collectd · GitHub

https://github.com/collectd/collectd/issues/2291
generic

snmp plugin: Fix double free of request PDU · collectd/collectd@d16c245 · GitHub

https://github.com/collectd/collectd/commit/d16c24542b2f96a194d43a73c2e5778822b9cb47
generic Patch Available

#881757 - collectd: CVE-2017-16820: snmp plugin: double free or heap corruption - Debian Bug report logs

https://bugs.debian.org/881757
redhat Patch Available

Affected: Red Hat Enterprise Linux 7.

https://access.redhat.com/errata/RHSA-2018:2615
redhat Patch Available

Affected: Red Hat Enterprise Linux 7.5.

https://access.redhat.com/errata/RHSA-2018:1605
redhat Patch Available
https://access.redhat.com/errata/RHSA-2018:0560
redhat Patch Available

Affected: Red Hat Enterprise Linux 7.

https://access.redhat.com/errata/RHSA-2018:0299
redhat Patch Available

Affected: Red Hat Enterprise Linux 7.

https://access.redhat.com/errata/RHSA-2018:0252

Patch Availability(5)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibcollectdclient-dev (5.5.1-1ubuntu0.1~esm1) @ xenial2026-05-20ubuntu
redhatcollectd-0:5.7.2-3.1.el7rhgs2018-09-04redhat
redhatintel-cmt-cat-0:1.0.1-1.el7ost2018-05-17redhat
redhatcollectd-0:5.8.0-3.el72018-03-20redhat
redhatcollectd-0:5.7.2-3.el7ost2018-02-13redhat

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.

All Vendor Advisories

(6)

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

Related CVEs(same vendor)

Frequently asked(5)

What is CVE-2017-16820?
CVE-2017-16820 is a critical vulnerability published on November 14, 2017. The csnmpreadtable function in snmp.c in the SNMP plugin in collectd before 5.6.3 is susceptible to a double free in a certain error case, which could lead to a crash (or potentially have other impact).
When was CVE-2017-16820 disclosed?
CVE-2017-16820 was first published in the National Vulnerability Database on November 14, 2017, with the most recent update on May 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2017-16820 actively exploited?
CVE-2017-16820 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 89.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2017-16820?
CVE-2017-16820 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2017-16820?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2017-16820, 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

Explore the affected products and dependency analysis for CVE-2017-16820

Explore →

Is Your Infrastructure Affected by CVE-2017-16820?

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

Start Free Scan →Browse All CVEs