CVE-1999-0038

HIGHPre-NVD 8.48.4—
EchelonGraph scoreMEDIUM confidence

Score 8.4 from GitHub Security Advisory (severity: HIGH) published 2022-04-30. NVD baseline CVSS 8.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Weaponized
8.4
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 8.4Exploit: NoneExposed: 0

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

Buffer overflow in xlock program allows local users to execute commands as root.

CVSS v3
8.4
EG Score
8.4(medium)
EPSS
67.6%
KEV
Not listed

Published

April 26, 1997

Last Modified

June 16, 2026

Advisory Details (1)

Auto-updated Jun 19, 2026
No patch confirmed yet.
generic

IBM X-Force Exchange

https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0038

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 3× in last 7d / 17× 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. 2026-07-13 06:07 UTCEPSS rescore
  2. 2026-07-11 08:22 UTCEPSS rescore
  3. 2026-07-08 15:08 UTCEPSS rescore
  4. 2026-07-04 06:26 UTCEPSS rescore
  5. 2026-07-02 14:00 UTCEPSS rescore
  6. 2026-06-29 14:02 UTCEPSS rescore
  7. 2026-06-27 03:04 UTCEPSS rescore
  8. 2026-06-24 14:01 UTCEPSS rescore
  9. 2026-06-23 21:29 UTCEPSS rescore
  10. 2026-06-22 14:22 UTCEPSS rescore
  11. 2026-06-21 01:56 UTCEPSS rescore
  12. 2026-06-19 19:22 UTCEPSS rescore
  13. 2026-06-18 17:49 UTCEPSS rescore
  14. 2026-06-18 17:49 UTCEPSS rescore
  15. 2026-06-17 17:49 UTCEPSS rescore
  16. 2026-06-16 17:49 UTCEPSS rescore
  17. 2026-06-14 23:13 UTCEPSS rescore
  18. 2026-06-13 22:56 UTCEPSS rescore
  19. 2026-06-12 23:07 UTCEPSS rescore
  20. 2026-06-11 13:55 UTCEPSS rescore
  21. 2026-06-10 22:13 UTCEPSS rescore
  22. 2026-06-10 13:17 UTCEPSS rescore
  23. 2026-06-08 14:13 UTCEPSS rescore
  24. 2026-06-07 15:21 UTCEPSS rescore
  25. 2026-06-06 13:44 UTCEPSS rescore
Show 29 more
  1. 2026-06-05 06:07 UTCEPSS rescore
  2. 2026-06-04 13:09 UTCEPSS rescore
  3. 2026-06-02 20:10 UTCEPSS rescore
  4. 2026-06-01 13:48 UTCEPSS rescore
  5. 2026-05-31 23:05 UTCEG score recompute
  6. 2026-05-31 23:05 UTCGHSA enrichment
  7. 2026-05-31 22:27 UTCEPSS rescore
  8. 2026-05-31 00:13 UTCEPSS rescore
  9. 2026-05-31 00:13 UTCEPSS rescore
  10. 2026-05-29 13:40 UTCEPSS rescore
  11. 2026-05-28 13:42 UTCEPSS rescore
  12. 2026-05-28 13:42 UTCEPSS rescore
  13. 2026-05-28 13:42 UTCEPSS rescore
  14. 2026-05-28 13:42 UTCEPSS rescore
  15. 2026-05-27 13:37 UTCEPSS rescore
  16. 2026-05-27 13:37 UTCEPSS rescore
  17. 2026-05-26 13:41 UTCEPSS rescore
  18. 2026-05-26 13:41 UTCEPSS rescore
  19. 2026-05-26 13:41 UTCEPSS rescore
  20. 2026-05-26 07:16 UTCEPSS rescore
  21. 2026-05-26 07:16 UTCEPSS rescore
  22. 2026-05-24 16:42 UTCEPSS rescore
  23. 2026-05-22 21:15 UTCEPSS rescore
  24. 2026-05-21 22:38 UTCEPSS rescore
  25. 2026-05-20 22:36 UTCEPSS rescore
  26. 2026-05-20 11:20 UTCEPSS rescore
  27. 2026-05-20 11:20 UTCEPSS rescore
  28. 2026-05-18 21:29 UTCEPSS rescore
  29. 2026-05-18 21:29 UTCEPSS rescore

Publicly available exploits

(2 references)

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

  • Exploit-DBEDB-19173✓ verified
    First seen Apr 26, 1997

    BSD/OS 2.1 / DG/UX 7.0 / Debian 1.3 / HP-UX 10.34 / IBM AIX 4.2 / SGI IRIX 6.4 / Solaris 2.5.1 - '/usr/bin/X11/xlock' Local Privilege Escalation (2)

    Open source ↗
  • Exploit-DBEDB-19172✓ verified
    First seen Apr 26, 1997

    BSD/OS 2.1 / DG/UX 7.0 / Debian 1.3 / HP-UX 10.34 / IBM AIX 4.2 / SGI IRIX 6.4 / Solaris 2.5.1 - 'xlock' Local Overflow / Local Privilege Escalation (1)

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-1999-0038?
CVE-1999-0038 is a high vulnerability published on April 26, 1997. Buffer overflow in xlock program allows local users to execute commands as root.
When was CVE-1999-0038 disclosed?
CVE-1999-0038 was first published in the National Vulnerability Database on April 26, 1997, with the most recent update on June 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-1999-0038 actively exploited?
CVE-1999-0038 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 67.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-1999-0038?
CVE-1999-0038 has a CVSS v3.1 base score of 8.4 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-1999-0038?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-1999-0038, 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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