Is CVE-2009-0847 in the CISA KEV catalog?

No. CVE-2009-0847 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2009-0847?

CVE-2009-0847 has a CVSS v2 base score of 4.3 (MEDIUM).

What is the EPSS score for CVE-2009-0847?

CVE-2009-0847 has an EPSS score of 2.77% (85th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2009-0847?

Upgrade krb5 on debian 11 to 1.6.dfsg.4~beta1-13 or later.

CVE & CISA-KEV Catalog

CVE-2009-0847

MEDIUMEPSS 85th pctl

4.3

CVSS v2

NVD

Description

The asn1buf_imbed function in the ASN.1 decoder in MIT Kerberos 5 (aka krb5) 1.6.3, when PK-INIT is used, allows remote attackers to cause a denial of service (application crash) via a crafted length value that triggers an erroneous malloc call, related to incorrect calculations with pointer arithmetic.

CWE-189

How to fix

Remediation Available

krb5Debian

Fixed in:1.6.dfsg.4~beta1-13CVE-2009-0847

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

2.77%probability of exploitation in 30 days

85thpercentile

Elevated risk: more likely to be exploited than 85% of all known CVEs.

References

Related Vulnerabilities

Other CWE-189 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2015-1538	High	10.0	99%	-	-
CVE-2006-3747	High	7.6	96%	-	Fix
CVE-2007-0071	High	9.3	93%	-	-
CVE-2015-3829	High	10.0	90%	-	-
CVE-2015-3864	High	10.0	87%	-	-
CVE-2015-1539	High	10.0	86%	-	-

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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.