CVE-2017-10966

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-17. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2.9%CVSS: 9.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

An issue was discovered in Irssi before 1.0.4. While updating the internal nick list, Irssi could incorrectly use the GHashTable interface and free the nick while updating it. This would then result in use-after-free conditions on each access of the hash table.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
50
EG Risk 50/100CISA SSVC

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%
Exploitation3% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track* or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
2.9%
EPSS %ILE
86th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact total (CVSS ≥ 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

July 7, 2017

Last Modified

June 17, 2026

Advisory Details (3)

Auto-updated Oct 6, 2026
Patch available. Sources: github_commit.
generic

[SECURITY] [DSA 4016-1] irssi security update

https://www.debian.org/security/2017/dsa-4016
generic
https://irssi.org/security/irssi_sa_2017_07.txt
github_commit

commit 5e26325317c7 (irssi/irssi)

Fix landed in irssi/irssi commit 5e26325317c7 — awaiting tagged release

https://github.com/irssi/irssi/commit/5e26325317c72a04c1610ad952974e206384d291

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntuirssi (0.8.20-2ubuntu2.2) @ zesty2026-05-20ubuntu

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

(19 across 19 ecosystems)
Alpine:v3.10(1)
PackageVulnerable rangeFix by version rangeDependents
irssi—
  • every version up to 1.0.4-r0: fixed in 1.0.4-r0
—
Alpine:v3.11(1)
PackageVulnerable rangeFix by version rangeDependents
irssi—
  • every version up to 1.0.4-r0: fixed in 1.0.4-r0
—
Alpine:v3.12(1)
PackageVulnerable rangeFix by version rangeDependents
irssi—
  • every version up to 1.0.4-r0: fixed in 1.0.4-r0
—
Alpine:v3.13(1)
PackageVulnerable rangeFix by version rangeDependents
irssi—
  • every version up to 1.0.4-r0: fixed in 1.0.4-r0
—
Alpine:v3.14(1)
PackageVulnerable rangeFix by version rangeDependents
irssi—
  • every version up to 1.0.4-r0: fixed in 1.0.4-r0
—
Alpine:v3.15(1)
PackageVulnerable rangeFix by version rangeDependents
irssi—
  • every version up to 1.0.4-r0: fixed in 1.0.4-r0
—
Alpine:v3.16(1)
PackageVulnerable rangeFix by version rangeDependents
irssi—
  • every version up to 1.0.4-r0: fixed in 1.0.4-r0
—
Alpine:v3.17(1)
PackageVulnerable rangeFix by version rangeDependents
irssi—
  • every version up to 1.0.4-r0: fixed in 1.0.4-r0
—
Alpine:v3.3(1)
PackageVulnerable rangeFix by version rangeDependents
irssi—
  • every version up to 0.8.21.r2: fixed in 0.8.21.r2
—
Alpine:v3.4(1)
PackageVulnerable rangeFix by version rangeDependents
irssi—
  • every version up to 0.8.21.r2: fixed in 0.8.21.r2
—
Alpine:v3.5(1)
PackageVulnerable rangeFix by version rangeDependents
irssi—
  • every version up to 0.8.21.r2: fixed in 0.8.21.r2
—
Alpine:v3.7(1)
PackageVulnerable rangeFix by version rangeDependents
irssi—
  • every version up to 1.0.4-r0: fixed in 1.0.4-r0
—
Alpine:v3.8(1)
PackageVulnerable rangeFix by version rangeDependents
irssi—
  • every version up to 1.0.4-r0: fixed in 1.0.4-r0
—
Alpine:v3.9(1)
PackageVulnerable rangeFix by version rangeDependents
irssi—
  • every version up to 1.0.4-r0: fixed in 1.0.4-r0
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
irssi—
  • every version up to 1.0.4-1: fixed in 1.0.4-1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
irssi—
  • every version up to 1.0.4-1: fixed in 1.0.4-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
irssi—
  • every version up to 1.0.4-1: fixed in 1.0.4-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
irssi—
  • every version up to 1.0.4-1: fixed in 1.0.4-1
—
Debian:7(1)
PackageVulnerable rangeFix by version rangeDependents
irssi0.8.15-5, 0.8.15-5+deb7u1, 0.8.15-5+deb7u2
  • every version up to 0.8.15-5+deb7u3: fixed in 0.8.15-5+deb7u3
—

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 8× 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 170 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2017-10966?
CVE-2017-10966 is a critical vulnerability published on July 7, 2017. An issue was discovered in Irssi before 1.0.4. While updating the internal nick list, Irssi could incorrectly use the GHashTable interface and free the nick while updating it. This would then result in use-after-free conditions on each access of the hash table.
When was CVE-2017-10966 disclosed?
CVE-2017-10966 was first published on July 7, 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-2017-10966 actively exploited?
CVE-2017-10966 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.9% probability of exploitation in the next 30 days (86th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2017-10966?
CVE-2017-10966 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2017-10966?
A fix for CVE-2017-10966 is available: update to the fixed version the vendor names in its advisory.

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