Is CVE-2006-6143 in the CISA KEV catalog?

No. CVE-2006-6143 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2006-6143?

CVE-2006-6143 has a CVSS v2 base score of 9.3 (HIGH).

What is the EPSS score for CVE-2006-6143?

CVE-2006-6143 has an EPSS score of 7.93% (94th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2006-6143?

Upgrade krb5 on debian 11 to 1.4.4-6 or later.

CVE & CISA-KEV Catalog

CVE-2006-6143

HIGHEPSS 94th pctl

9.3

CVSS v2

NVD

Description

The RPC library in Kerberos 5 1.4 through 1.4.4, and 1.5 through 1.5.1, as used in Kerberos administration daemon (kadmind) and other products that use this library, calls an uninitialized function pointer in freed memory, which allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via unspecified vectors.

CWE-824

How to fix

Remediation Available

krb5Debian

Fixed in:1.4.4-6CVE-2006-6143

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

7.93%probability of exploitation in 30 days

94thpercentile

High risk: more likely to be exploited than 94% of all known CVEs.

References

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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 2026-04-23.