Is CVE-2011-4868 in the CISA KEV catalog?

No. CVE-2011-4868 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2011-4868?

CVE-2011-4868 has a CVSS v2 base score of 6.1 (MEDIUM).

What is the EPSS score for CVE-2011-4868?

CVE-2011-4868 has an EPSS score of 3.61% (88th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2011-4868?

Upgrade isc-dhcp on debian 11 to 4.2.2.dfsg.1-5 or later.

CVE & CISA-KEV Catalog

CVE-2011-4868

MEDIUMEPSS 88th pctl

6.1

CVSS v2

NVD

Description

The logging functionality in dhcpd in ISC DHCP before 4.2.3-P2, when using Dynamic DNS (DDNS) and issuing IPv6 addresses, does not properly handle the DHCPv6 lease structure, which allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via crafted packets related to a lease-status update.

CWE-399Resource Management Errors

How to fix

Remediation Available

isc-dhcpDebian

Fixed in:4.2.2.dfsg.1-5CVE-2011-4868

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

3.61%probability of exploitation in 30 days

88thpercentile

Elevated risk: more likely to be exploited than 88% of all known CVEs.

References

Vendor Advisory1

isc.org

Other references3

Related Vulnerabilities

Other CWE-399 (Resource Management Errors) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2009-3103	High	10.0	90%	-	-
CVE-2009-0075	High	9.3	85%	-	-
CVE-2005-1790	Low	2.6	83%	-	-
CVE-2010-0806	High	8.8	82%	KEV	-
CVE-2009-2526	High	7.8	82%	-	-
CVE-2015-1868	High	7.8	82%	-	Fix

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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 2026-04-29.