CVE-2017-5123

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2022-05-24. NVD baseline CVSS 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this weekElevated
8.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 4%CVSS: 8.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Insufficient data validation in waitid allowed an user to escape sandboxes on Linux.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
60(Track)
EG Risk 60/100SSVC: 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%
Exploitation40% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
88.6%
KEV
Not listed

Published

November 2, 2021

Last Modified

November 21, 2024

References (6)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 14× in last 7d / 42× 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.

  1. 2026-07-23 14:15 UTCEPSS rescore
  2. 2026-07-23 01:29 UTCEG score recompute
  3. 2026-07-22 22:09 UTCEG score recompute
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  63. 2026-05-26 08:09 UTCGHSA enrichment
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Publicly available exploits

(5 references)

Working exploit code is in the public domain (3 GitHub PoCs) (2 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCc3r34lk1ll3r/CVE-2017-5123
    First seen May 8, 2020

    PoC CVE-2017-5123 - LPE - Bypassing SMEP/SMAP. No KASLR

    Open source ↗
  • GitHub PoCSynacktiv-contrib/exploiting-cve-2017-5123
    First seen Mar 1, 2018

    Source code and configuration files related to our article in MISC96

    Open source ↗
  • Exploit-DBEDB-43127
    First seen Nov 6, 2017

    Linux Kernel 4.13 (Ubuntu 17.10) - 'waitid()' SMEP/SMAP/Chrome Sandbox Privilege Escalation

    Open source ↗
  • GitHub PoC0x5068656e6f6c/CVE-2017-5123
    First seen Nov 3, 2017

    Exploit for the linux kernel vulnerability CVE-2017-5123

    Open source ↗
  • Exploit-DBEDB-43029
    First seen Oct 22, 2017

    Linux Kernel 4.14.0-rc4+ - 'waitid()' Local Privilege Escalation

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2017-5123?
CVE-2017-5123 is a high vulnerability published on November 2, 2021. Insufficient data validation in waitid allowed an user to escape sandboxes on Linux.
When was CVE-2017-5123 disclosed?
CVE-2017-5123 was first published in the National Vulnerability Database on November 2, 2021, 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-2017-5123 actively exploited?
CVE-2017-5123 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 88.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2017-5123?
CVE-2017-5123 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2017-5123?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2017-5123, 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

Explore the affected products and dependency analysis for CVE-2017-5123

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