Is CVE-2012-3421 in the CISA KEV catalog?

No. CVE-2012-3421 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2012-3421?

CVE-2012-3421 has a CVSS v2 base score of 5.0 (MEDIUM).

What is the EPSS score for CVE-2012-3421?

CVE-2012-3421 has an EPSS score of 3.33% (87th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2012-3421?

Upgrade pcp on debian 11 to 3.6.5 or later.

CVE & CISA-KEV Catalog

CVE-2012-3421

MEDIUMEPSS 87th pctl

5.0

CVSS v2

NVD

Description

The pduread function in pdu.c in libpcp in Performance Co-Pilot (PCP) before 3.6.5 does not properly time out connections, which allows remote attackers to cause a denial of service (pmcd hang) by sending individual bytes of a PDU separately, related to an "event-driven programming flaw."

How to fix

Remediation Available

pcpDebian

Fixed in:3.6.5CVE-2012-3421

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

3.33%probability of exploitation in 30 days

87thpercentile

Elevated risk: more likely to be exploited than 87% of all known CVEs.

References

Other references11

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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.