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CVE-2006-4178

22
FAUCET Score

CVE-2006-4178 is an integer signedness error in the i386_set_ldt call within FreeBSD versions 5.2 through 5.5. A local attacker can exploit this flaw by providing specific negative signed integer arguments, leading to a denial of service (system crash) due to the bzero function being called with an excessively large length parameter. This vulnerability has a CVSS score of 4.9, indicating a low attack complexity and requiring local access, with the primary impact being system availability. While there is an ExploitDB entry (EDB-28648) detailing local denial of service vulnerabilities related to i386_set_ldt(), there is no evidence of active exploitation, Metasploit or Nuclei modules, or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 5.5CPE matchmatch criteria
cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
5.2CPE matchmatch criteria
cpe:2.3:o:freebsd:freebsd:5.2:*:*:*:*:*:*:*
5.2.1CPE matchmatch criteria
cpe:2.3:o:freebsd:freebsd:5.2.1:*:*:*:*:*:*:*
5.3CPE matchmatch criteria
cpe:2.3:o:freebsd:freebsd:5.3:*:*:*:*:*:*:*
5.4CPE matchmatch criteria
cpe:2.3:o:freebsd:freebsd:5.4:*:*:*:*:*:*:*

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
0.77%
Probability of exploitation in next 30 days
EPSS Percentile
51.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
ExploitDB: EDB-28648 · Sep 23, 2006
This CVE's current EPSS score of 0.0077 is in the 86th 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/22064
securitytracker.com / id
idefense.com / intelligence/vulnerabilities/display.php
Vendor Advisory
securityfocus.com / archive/1/446946/100/0/threaded
securityfocus.com / bid/20158