Is CVE-2013-0238 in the CISA KEV catalog?

No. CVE-2013-0238 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2013-0238?

CVE-2013-0238 has a CVSS v2 base score of 5.0 (MEDIUM).

What is the EPSS score for CVE-2013-0238?

CVE-2013-0238 has an EPSS score of 9.96% (95th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2013-0238?

Upgrade ircd-hybrid on debian 11 to 1:7.2.2.dfsg.2-10 or later.

CVE & CISA-KEV Catalog

CVE-2013-0238

MEDIUMEPSS 95th pctl

5.0

CVSS v2

NVD

Description

The try_parse_v4_netmask function in hostmask.c in IRCD-Hybrid before 8.0.6 does not properly validate masks, which allows remote attackers to cause a denial of service (crash) via a mask that causes a negative number to be parsed.

CWE-20Improper Input Validation

How to fix

Remediation Available

ircd-hybridDebian

Fixed in:1:7.2.2.dfsg.2-10CVE-2013-0238

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

9.96%probability of exploitation in 30 days

95thpercentile

Very high risk: more likely to be exploited than 95% of all known CVEs.

References

Vendor Advisory2

Other references10

Related Vulnerabilities

Other CWE-20 (Improper Input Validation) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-3400	Critical	10.0	100%	KEV + Ransom	-
CVE-2021-45105	Medium	5.9	100%	-	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2021-21985	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2018-7600	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2020-3452	High	7.5	100%	KEV	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.