Is CVE-2012-4423 in the CISA KEV catalog?

No. CVE-2012-4423 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2012-4423?

CVE-2012-4423 has a CVSS v2 base score of 5.0 (MEDIUM).

What is the EPSS score for CVE-2012-4423?

CVE-2012-4423 has an EPSS score of 3.72% (88th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2012-4423?

Upgrade libvirt on debian 11 to 0.9.12-5 or later.

CVE & CISA-KEV Catalog

CVE-2012-4423

MEDIUMEPSS 88th pctl

5.0

CVSS v2

NVD

Description

The virNetServerProgramDispatchCall function in libvirt before 0.10.2 allows remote attackers to cause a denial of service (NULL pointer dereference and segmentation fault) via an RPC call with (1) an event as the RPC number or (2) an RPC number whose value is in a "gap" in the RPC dispatch table.

How to fix

Remediation Available

libvirtDebian

Fixed in:0.9.12-5CVE-2012-4423

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

3.72%probability of exploitation in 30 days

88thpercentile

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

References

Other references12

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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.