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CVE-2006-4435

15
FAUCET Score

CVE-2006-4435 describes a denial-of-service vulnerability affecting OpenBSD versions 3.8, 3.9, and potentially earlier, where an attacker can trigger a kernel panic by allocating an excessive number of semaphores. This vulnerability has a CVSS score of 4.9, indicating a medium severity, with a local attack vector and high impact on availability. There is no evidence of active exploitation, nor is exploit code publicly available in Metasploit, Nuclei, or ExploitDB, and it has received no community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
3.8CPE matchmatch criteria
cpe:2.3:o:openbsd:openbsd:3.8:*:*:*:*:*:*:*
3.9CPE matchmatch criteria
cpe:2.3:o:openbsd:openbsd:3.9:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.9MEDIUM

AV:L/AC:L/Au:N/C:N/I:N/A:C

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Exploitability Score
3.9
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.34%
Probability of exploitation in next 30 days
EPSS Percentile
26.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0034 is in the 38th percentile among its peer group of 3,052 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

secunia.com / advisories/21642
PatchVendor Advisory
securitytracker.com / id
Patch
exchange.xforce.ibmcloud.com / vulnerabilities/28617
openbsd.org / errata38.html
openbsd.org / errata.html
osvdb.org / 28195
securityfocus.com / bid/19713
Patch