CVE-2017-5123

HIGHNVD 8.88.8—Elevated

8.8

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

CVSS v3: 8.8
EG Score: 8.8(medium)
EPSS: 82.7%
KEV: Not listed

Published

November 2, 2021

Last Modified

November 21, 2024

References (6)

chrome-cve-admin@googlehttps://crbug.com/772848
chrome-cve-admin@googlehttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=96ca579a1ecc943b75beba58bebb0356f6cc4b51
chrome-cve-admin@googlehttps://security.netapp.com/advisory/ntap-20211223-0003/
af854a3a-2127-422b-91ae-364da2661108https://crbug.com/772848
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=96ca579a1ecc943b75beba58bebb0356f6cc4b51
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20211223-0003/

Weakness Classification(1)

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

CWE-20Improper Input Validation

Data Freshness Timeline

(refreshed 12× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-08 14:14 UTCepss_batch
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2026-06-06 13:45 UTCepss_batch
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2026-06-04 13:10 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
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2026-06-01 13:49 UTCepss_batch
2026-05-31 22:28 UTCepss_batch
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2026-05-29 13:41 UTCepss_batch
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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 ↗

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 82.7% 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

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CVE-2017-5123

📅 Published

🔄 Last Modified

🔗 References (6)

Weakness Classification(1)

Data Freshness Timeline

Publicly available exploits

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2017-5123?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (6)

Frequently asked(5)

Related CVEs(same CWE)