CVE-2017-16844

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
Elevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 13%CVSS: 9.8Exploit: Elevated riskExposed: 0

A fix is available — apply it.

Heap-based buffer overflow in the loadbuf function in formisc.c in formail in procmail 3.22 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted e-mail message because of a hardcoded realloc size, a different vulnerability than CVE-2014-3618.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
65(Track*)
EG Risk 65/100SSVC: 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%
Automatability30% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
13%
EPSS %ILE
96%
KEV
Not listed

Published

November 16, 2017

Last Modified

June 17, 2026

Advisory Details (5)

Auto-updated Sep 8, 2026
Patch available. Sources: redhat.
generic

[SECURITY] [DSA 4041-1] procmail security update

https://www.debian.org/security/2017/dsa-4041
generic

[SECURITY] [DLA 1173-1] procmail security update

https://lists.debian.org/debian-lts-announce/2017/11/msg00019.html
generic Patch Available

#876511 - formail: CVE-2017-16844: heap-based buffer overflow in loadbuf() - Debian Bug report logs

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=876511
redhat Patch Available

Affected: Red Hat Enterprise Linux 7.

https://access.redhat.com/errata/RHSA-2017:3269
generic
http://www.securitytracker.com/id/1039844

Vendor Advisories for CVE-2017-16844(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuprocmail (3.22-25ubuntu0.16.04.1) @ xenial2026-05-20ubuntu
ubuntuprocmail (3.22-19ubuntu0.2) @ precise2026-05-20ubuntu
redhatprocmail-0:3.22-36.el7_4.12017-11-28redhat

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

(7 across 7 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
procmail—3.22-26—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
procmail—3.22-26—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
procmail—3.22-26—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
procmail—3.22-26—
Debian:7(1)
PackageVulnerable rangeFixed inDependents
procmail3.22-20, 3.22-20+deb7u13.22-20+deb7u2—
Debian:8(1)
PackageVulnerable rangeFixed inDependents
procmail3.22-243.22-24+deb8u1—
Debian:9(1)
PackageVulnerable rangeFixed inDependents
procmail3.22-253.22-25+deb9u1—

Weakness Classification(1)

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

Additional Vendor Advisories

(3)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 5× in last 7d / 24× 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 142 total refreshes for this CVE.

  1. 2026-09-07 15:56 UTCEPSS rescore
  2. 2026-09-04 13:56 UTCEPSS rescore
  3. 2026-09-04 05:01 UTCEPSS rescore
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  9. 2026-08-27 14:20 UTCEPSS rescore
  10. 2026-08-27 01:00 UTCOSV refresh
  11. 2026-08-26 14:41 UTCEPSS rescore
  12. 2026-08-25 13:44 UTCEPSS rescore
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  23. 2026-08-10 14:38 UTCOSV refresh
  24. 2026-08-09 13:42 UTCEPSS rescore
  25. 2026-08-08 16:32 UTCEPSS rescore
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  1. 2026-08-07 16:22 UTCEPSS rescore
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  5. 2026-08-04 10:32 UTCEPSS rescore
  6. 2026-08-02 02:23 UTCEPSS rescore
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  8. 2026-07-30 16:24 UTCEPSS rescore
  9. 2026-07-30 01:26 UTCEPSS rescore
  10. 2026-07-28 15:32 UTCEPSS rescore
  11. 2026-07-26 14:51 UTCEPSS rescore
  12. 2026-07-25 15:30 UTCOSV refresh
  13. 2026-07-25 14:13 UTCEPSS rescore
  14. 2026-07-23 14:15 UTCEPSS rescore
  15. 2026-07-23 01:28 UTCEG score recompute
  16. 2026-07-22 22:07 UTCEG score recompute
  17. 2026-07-22 14:04 UTCEPSS rescore
  18. 2026-07-21 15:21 UTCEPSS rescore
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  22. 2026-07-19 14:28 UTCEPSS rescore
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  24. 2026-07-19 02:26 UTCEPSS rescore
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  26. 2026-07-18 10:00 UTCEPSS rescore
  27. 2026-07-16 16:59 UTCEPSS rescore
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  29. 2026-07-15 16:54 UTCEPSS rescore
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  31. 2026-07-15 01:56 UTCEPSS rescore
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  36. 2026-07-09 19:06 UTCEPSS rescore
  37. 2026-07-08 15:10 UTCEPSS rescore
  38. 2026-07-08 10:27 UTCOSV refresh
  39. 2026-07-07 13:42 UTCEPSS rescore
  40. 2026-07-06 16:24 UTCEPSS rescore
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  42. 2026-07-05 02:27 UTCEPSS rescore
  43. 2026-07-01 15:02 UTCEPSS rescore
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  45. 2026-06-30 23:19 UTCEPSS rescore
  46. 2026-06-30 23:19 UTCEPSS rescore
  47. 2026-06-28 04:53 UTCEPSS rescore
  48. 2026-06-27 03:05 UTCEPSS rescore
  49. 2026-06-25 13:47 UTCEPSS rescore
  50. 2026-06-25 13:47 UTCEPSS rescore
  51. 2026-06-24 14:02 UTCEPSS rescore
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  59. 2026-06-19 22:06 UTCOSV refresh
  60. 2026-06-18 17:50 UTCEPSS rescore
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  67. 2026-06-12 23:09 UTCEPSS rescore
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  75. 2026-06-04 13:10 UTCEPSS rescore

Frequently asked(5)

What is CVE-2017-16844?
CVE-2017-16844 is a critical vulnerability published on November 16, 2017. Heap-based buffer overflow in the loadbuf function in formisc.c in formail in procmail 3.22 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted e-mail message because of a hardcoded realloc size, a different vulnerability than…
When was CVE-2017-16844 disclosed?
CVE-2017-16844 was first published in the National Vulnerability Database on November 16, 2017, 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-2017-16844 actively exploited?
CVE-2017-16844 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 13% probability of exploitation in the next 30 days, which ranks it in the top 4.0% of all scored CVEs.
What is the CVSS score of CVE-2017-16844?
CVE-2017-16844 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2017-16844?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2017-16844, 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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