CVE-2017-9146

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2022-05-14. NVD baseline CVSS 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS: 8.8Exploit: None knownExposed: 0

A fix is available — apply it.

The TNEFFillMapi function in lib/ytnef.c in libytnef in ytnef through 1.9.2 does not ensure a nonzero count value before a certain memory allocation, which allows remote attackers to cause a denial of service (heap-based buffer overflow and application crash) or possibly have unspecified other impact via a crafted tnef file.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
45(Track)
EG Risk 45/100SSVC: 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
Severity88% × 45%
Exploitation2% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
2%
EPSS %ILE
83%
KEV
Not listed

Published

May 22, 2017

Last Modified

June 17, 2026

Advisory Details (3)

Auto-updated May 22, 2026
Patch available.
generic

[SECURITY] Fedora 30 Update: ytnef-1.9.3-1.fc30 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LFJWMUEUC4ILH2HEOCYVVLQT654ZMCGQ/
generic

heap-buffer overrun: write extra bytes in TNEFFillMapi · Issue #47 · Yeraze/ytnef · GitHub

https://github.com/Yeraze/ytnef/issues/47
generic Patch Available

#862707 - libytnef: CVE-2017-9146: Heap-buffer overrun: write extra bytes in TNEFFillMapi - Debian Bug report logs

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=862707

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibytnef0-dev (1.5-6ubuntu0.2) @ trusty2026-05-22ubuntu

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
libytnef—1.9.3-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
libytnef—1.9.3-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
libytnef—1.9.3-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
libytnef—1.9.3-1—

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 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 175 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2017-9146?
CVE-2017-9146 is a high vulnerability published on May 22, 2017. The TNEFFillMapi function in lib/ytnef.c in libytnef in ytnef through 1.9.2 does not ensure a nonzero count value before a certain memory allocation, which allows remote attackers to cause a denial of service (heap-based buffer overflow and application crash) or possibly have unspecified other…
When was CVE-2017-9146 disclosed?
CVE-2017-9146 was first published in the National Vulnerability Database on May 22, 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-2017-9146 actively exploited?
CVE-2017-9146 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 16.7% of all scored CVEs.
What is the CVSS score of CVE-2017-9146?
CVE-2017-9146 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2017-9146?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2017-9146, 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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