Is CVE-2008-4109 in the CISA KEV catalog?

No. CVE-2008-4109 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2008-4109?

CVE-2008-4109 has a CVSS v2 base score of 5.0 (MEDIUM).

What is the EPSS score for CVE-2008-4109?

CVE-2008-4109 has an EPSS score of 28.60% (98th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2008-4109

MEDIUMEPSS 98th pctl

5.0

CVSS v2

NVD

Description

A certain Debian patch for OpenSSH before 4.3p2-9etch3 on etch; before 4.6p1-1 on sid and lenny; and on other distributions such as SUSE uses functions that are not async-signal-safe in the signal handler for login timeouts, which allows remote attackers to cause a denial of service (connection slot exhaustion) via multiple login attempts. NOTE: this issue exists because of an incorrect fix for CVE-2006-5051.

CWE-264

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

28.60%probability of exploitation in 30 days

98thpercentile

Very high risk: more likely to be exploited than 98% of all known CVEs.

References

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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 2026-04-23.