CVE-1999-1166

NONECVSS 0.0Weaponized

0.0

Linux 2.0.37 does not properly encode the Custom segment limit, which allows local users to gain root privileges by accessing and modifying kernel memory.

CVSS v3: —
EG Score: —
EPSS: 36.7%
KEV: Not listed

Published

July 11, 1999

Last Modified

April 16, 2026

References (4)

cve@mitrehttp://www.securityfocus.com/archive/1/18156
cve@mitrehttp://www.securityfocus.com/bid/523
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/archive/1/18156
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/523

Data Freshness Timeline

(refreshed 13× 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.

2026-05-29 13:40 UTCepss_batch
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Publicly available exploits

(1 reference)

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

Exploit-DBEDB-19419✓ verified
First seen Jul 13, 1999
Linux Kernel 2.0.37 - Segment Limit Privilege Escalation
Open source ↗

Frequently asked(4)

What is CVE-1999-1166?

CVE-1999-1166 is a none vulnerability published on July 11, 1999. Linux 2.0.37 does not properly encode the Custom segment limit, which allows local users to gain root privileges by accessing and modifying kernel memory.

When was CVE-1999-1166 disclosed?

CVE-1999-1166 was first published in the National Vulnerability Database on July 11, 1999, with the most recent update on April 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-1999-1166 actively exploited?

CVE-1999-1166 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 36.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-1999-1166?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-1999-1166, 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.

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CVE-1999-1166

📅 Published

🔄 Last Modified

🔗 References (4)