CVE-2017-12858

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: 3.3%CVSS: 9.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Double free vulnerability in the _zip_dirent_read function in zip_dirent.c in libzip allows attackers to have unspecified impact via unknown vectors.

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
3.3%
EPSS %ILE
88th
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

August 23, 2017

Last Modified

June 17, 2026

Advisory Details (2)

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

commit 2217022b7d11 (nih-at/libzip)

Patch available: nih-at/libzip rel-1-6-0 (contains commit 2217022b7d11)

https://github.com/nih-at/libzip/commit/2217022b7d1142738656d891e00b3d2d9179b796
generic

CVE-2017-12858 - PSIRT.COM

http://www.securityfocus.com/bid/100459

Weakness Classification(1)

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

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 165 total refreshes for this CVE.

  1. 2026-10-09 20:02 UTCEPSS rescore
  2. 2026-10-08 16:35 UTCEPSS rescore
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  10. 2026-09-30 09:25 UTCEG score recompute
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  8. 2026-08-26 15:06 UTCOSV refresh
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  37. 2026-07-25 04:41 UTCOSV refresh
  38. 2026-07-23 14:15 UTCEPSS rescore
  39. 2026-07-23 01:26 UTCEG score recompute
  40. 2026-07-22 22:05 UTCEG score recompute
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  75. 2026-06-27 03:05 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2017-12858?
CVE-2017-12858 is a critical vulnerability published on August 23, 2017. Double free vulnerability in the zipdirentread function in zipdirent.c in libzip allows attackers to have unspecified impact via unknown vectors.
When was CVE-2017-12858 disclosed?
CVE-2017-12858 was first published on August 23, 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-2017-12858 actively exploited?
CVE-2017-12858 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3.3% probability of exploitation in the next 30 days (88th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2017-12858?
CVE-2017-12858 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2017-12858?
A fix for CVE-2017-12858 is available: update to the fixed version the vendor names in its advisory.

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