How severe is CVE-2006-4435?

CVE-2006-4435 has a CVSS 2.0 base score of 4.9, rated medium severity.

Is CVE-2006-4435 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2006-4435?

CVE-2006-4435 primarily affects Openbsd. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2006-4435?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2006-4435 published?

CVE-2006-4435 was published on 2006-08-29 and last updated on 2026-06-16.

CVE-2006-4435

CVE-2006-4435 is a medium-severity vulnerability in Openbsd with a CVSS 2.0 base score of 4.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 4.9)
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Openbsd
Published: 2006-08-29
Last modified: 2026-06-16

Description

OpenBSD 3.8, 3.9, and possibly earlier versions allows context-dependent attackers to cause a denial of service (kernel panic) by allocating more semaphores than the default.

Frequently asked questions

What is CVE-2006-4435?: OpenBSD 3.8, 3.9, and possibly earlier versions allows context-dependent attackers to cause a denial of service (kernel panic) by allocating more semaphores than the default.
How severe is CVE-2006-4435?: CVE-2006-4435 has a CVSS 2.0 base score of 4.9, rated medium severity.
Is CVE-2006-4435 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-4435?: CVE-2006-4435 primarily affects Openbsd. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2006-4435?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2006-4435 published?: CVE-2006-4435 was published on 2006-08-29 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:o:openbsd:openbsd:3.8:*:*:*:*:*:*:*
cpe:2.3:o:openbsd:openbsd:3.9:*:*:*:*:*:*:*

More vulnerabilities in Openbsd

CVE-2007-1365 — Critical (CVSS 10.0): Buffer overflow in kern/uipc_mbuf2.c in OpenBSD 3.9 and 4.0 allows remote attackers to execute arbitrary code via…
CVE-2006-4304 — Critical (CVSS 10.0): Buffer overflow in the sppp driver in FreeBSD 4.11 through 6.1, NetBSD 2.0 through 4.0 beta before 20060823, and…
CVE-2004-0492 — Critical (CVSS 10.0): Heap-based buffer overflow in proxy_util.c for mod_proxy in Apache 1.3.25 to 1.3.31 allows remote attackers to cause a…
CVE-2004-0414 — Critical (CVSS 10.0): CVS 1.12.x through 1.12.8, and 1.11.x through 1.11.16, does not properly handle malformed "Entry" lines, which prevents…
CVE-2004-0416 — Critical (CVSS 10.0): Double free vulnerability for the error_prog_name string in CVS 1.12.x through 1.12.8, and 1.11.x through 1.11.16, may…
CVE-2004-0418 — Critical (CVSS 10.0): serve_notify in CVS 1.12.x through 1.12.8, and 1.11.x through 1.11.16, does not properly handle empty data lines, which…

All CVEs affecting Openbsd →