What is CVE-2006-4243?

CVE-2006-4243 is a critical-severity vulnerability in Linux-2.6, classified under Improper Privilege Management. CVSS score: 9.8/10. Published 2019-11-06.

How severe is CVE-2006-4243?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Privilege escalation in Linux-2.6

CVE-2006-4243

linux vserver 2.6 before 2.6.17 suffers from privilege escalation in remount code.

Vulnerability class: Privilege Escalation

Published 2019-11-06 · last modified 2026-06-16.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.018 (77.8th percentile), scored 2026-09-28.

Low probability of exploitation in the next 30 days, but still tracked. 78th percentile — 77.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: 0.000

Affected products

Linux-2.6 — versions 2.6 before 2.6.17
Linux-Vserver

Weakness classification (CWE)

CWE-269 — Improper Privilege Management

References

security-tracker.debian.org/tracker/CVE-2006-4243 (Third Party Advisory)

Frequently asked questions

What is CVE-2006-4243?: CVE-2006-4243 is a critical-severity vulnerability in Linux-2.6, classified under Improper Privilege Management. CVSS score: 9.8/10. Published 2019-11-06.
How severe is CVE-2006-4243?: Critical severity. CVSS v3 base score is 9.8 out of 10.