Is CVE-2006-4447 in the CISA KEV catalog?

No. CVE-2006-4447 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2006-4447?

CVE-2006-4447 has a CVSS v2 base score of 7.2 (HIGH).

What is the EPSS score for CVE-2006-4447?

CVE-2006-4447 has an EPSS score of 0.43% (35th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2006-4447?

Upgrade libx11 on debian 11 to 2:1.0.0-7 or later.

CVE & CISA-KEV Catalog

CVE-2006-4447

HIGH

7.2

CVSS v2

NVD

Description

X.Org and XFree86, including libX11, xdm, xf86dga, xinit, xload, xtrans, and xterm, does not check the return values for setuid and seteuid calls when attempting to drop privileges, which might allow local users to gain privileges by causing those calls to fail, such as by exceeding a ulimit.

How to fix

Remediation Available

libx11Debian

Fixed in:2:1.0.0-7CVE-2006-4447

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

0.43%probability of exploitation in 30 days

35thpercentile

Low risk: more likely to be exploited than 35% of all known CVEs.

References

Patch3

Government Resource1

kb.cert.org

Other references13

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-16.