CVE-2018-1000001

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2022-05-13. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Weaponized
7.8EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • Public exploit code is available (Metasploit, Exploit-DB (verified), epss top5pct, public exploit)
CISA-KEV: Not listedEPSS PROB: 13%CVSS: 7.8Exploit: Metasploit · Exploit-DB (verified) · epss top5pct · public exploitExposed: 0

A fix is available — apply it.

In glibc 2.26 and earlier there is confusion in the usage of getcwd() by realpath() which can be used to write before the destination buffer leading to a buffer underflow and potential code execution.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
66(Track)
EG Risk 66/100SSVC: 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
Severity78% × 45%
Exploitation65% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
13%
EPSS %ILE
96%
KEV
Not listed

Published

January 31, 2018

Last Modified

November 21, 2024

References (20)

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntunscd (2.23-0ubuntu10) @ xenial2026-05-23ubuntu
ubuntulibc6 (2.15-0ubuntu10.21) @ precise2026-05-23ubuntu
ubuntumusl (1.1.9-1ubuntu0.1~esm2) @ xenial2026-05-23ubuntu
redhatglibc-0:2.17-222.el72018-04-10redhat

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
glibc—2.26-4—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
glibc—2.26-4—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
glibc—2.26-4—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
glibc—2.26-4—

Weakness Classification(1)

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

All Vendor Advisories

(4)

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 / 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 122 total refreshes for this CVE.

  1. 2026-09-05 15:24 UTCEPSS rescore
  2. 2026-09-04 13:56 UTCEPSS rescore
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  7. 2026-08-31 15:34 UTCOSV refresh
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  20. 2026-08-14 20:54 UTCOSV refresh
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  6. 2026-07-30 16:24 UTCEPSS rescore
  7. 2026-07-30 09:44 UTCOSV refresh
  8. 2026-07-30 01:26 UTCEPSS rescore
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  13. 2026-07-23 01:31 UTCEG score recompute
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  28. 2026-07-13 22:26 UTCEPSS rescore
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  30. 2026-07-12 18:38 UTCOSV refresh
  31. 2026-07-12 05:43 UTCEPSS rescore
  32. 2026-07-11 08:24 UTCEPSS rescore
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  45. 2026-06-30 23:19 UTCEPSS rescore
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  51. 2026-06-25 13:47 UTCEPSS rescore
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  54. 2026-06-24 02:59 UTCOSV refresh
  55. 2026-06-23 21:30 UTCEPSS rescore
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  74. 2026-06-10 22:15 UTCEPSS rescore
  75. 2026-06-10 13:19 UTCEPSS rescore

Publicly available exploits

(4 references)

Working exploit code is in the public domain (1 Metasploit module) (1 GitHub PoC) (2 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-44889✓ verified
    First seen Jun 13, 2018

    glibc - 'realpath()' Privilege Escalation (Metasploit)

    Open source ↗
  • GitHub PoC0x00-0x00/CVE-2018-1000001
    First seen Feb 7, 2018

    glibc getcwd() local privilege escalation compiled binaries

    Open source ↗
  • Exploit-DBEDB-43775✓ verified
    First seen Jan 16, 2018

    glibc < 2.26 - 'getcwd()' Local Privilege Escalation

    Open source ↗
  • Metasploitexploit/linux/local/glibc_realpath_priv_esc✓ verified
    First seen Jan 16, 2018

    glibc 'realpath()' Privilege Escalation

    Open source ↗

Frequently asked(5)

What is CVE-2018-1000001?
CVE-2018-1000001 is a high vulnerability published on January 31, 2018. In glibc 2.26 and earlier there is confusion in the usage of getcwd() by realpath() which can be used to write before the destination buffer leading to a buffer underflow and potential code execution.
When was CVE-2018-1000001 disclosed?
CVE-2018-1000001 was first published in the National Vulnerability Database on January 31, 2018, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2018-1000001 actively exploited?
CVE-2018-1000001 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 3.8% of all scored CVEs.
What is the CVSS score of CVE-2018-1000001?
CVE-2018-1000001 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2018-1000001?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-1000001, 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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