Is CVE-2003-0864 in the CISA KEV catalog?

No. CVE-2003-0864 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2003-0864?

CVE-2003-0864 has a CVSS v2 base score of 5.0 (MEDIUM).

What is the EPSS score for CVE-2003-0864?

CVE-2003-0864 has an EPSS score of 4.10% (90th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2003-0864?

Upgrade ircd-irc2 on debian 11 to 2.10.3p5-1 or later.

CVE & CISA-KEV Catalog

CVE-2003-0864

MEDIUMEPSS 90th pctl

5.0

CVSS v2

NVD

Description

Buffer overflow in m_join in channel.c for IRCnet IRCD 2.10.x to 2.10.3p3 allows remote attackers to cause a denial of service.

How to fix

Remediation Available

ircd-irc2Debian

Fixed in:2.10.3p5-1CVE-2003-0864

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

4.10%probability of exploitation in 30 days

90thpercentile

Elevated risk: more likely to be exploited than 90% of all known CVEs.

References

Patch1

securityfocus.com

Other references4

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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.