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CVE-2006-3740

18
FAUCET Score

CVE-2006-3740 describes an integer overflow vulnerability in the scan_cidfont function of X.Org 6.8.2 and XFree86 X server. This flaw allows local attackers to execute arbitrary code by supplying specially crafted CMap and CIDFont font data with manipulated item counts in specific sections. With a CVSS score of 7.2 (High), this vulnerability has a low attack complexity and requires local access, but successful exploitation grants complete confidentiality, integrity, and availability impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this decade-old vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
6.8.2CPE matchmatch criteria
cpe:2.3:a:x.org:x.org:6.8.2:*:*:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:a:xfree86_project:xfree86_x:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.2HIGH

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

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Exploitability Score
3.9
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.50%
Probability of exploitation in next 30 days
EPSS Percentile
40.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0050 is in the 60th percentile among its peer group of 3,241 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 0.5 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 3Fixed in: XFree86-0:4.3.0-113.EL
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: xorg-x11-0:6.8.2-1.EL.13.37.2
View patch

Vendor Advisories (1)

redhatCVE-2006-3740Important

security flaw

Sep 12, 2006

References

secunia.com / advisories/21864
secunia.com / advisories/21889
secunia.com / advisories/21890
secunia.com / advisories/21894
secunia.com / advisories/21900
secunia.com / advisories/21904
secunia.com / advisories/21908
secunia.com / advisories/21924
secunia.com / advisories/22080
secunia.com / advisories/22141
secunia.com / advisories/22332
secunia.com / advisories/22560
secunia.com / advisories/23033
secunia.com / advisories/23899
secunia.com / advisories/23907
secunia.com / advisories/24636
security.gentoo.org / glsa/glsa-200609-07.xml
securitytracker.com / id
exchange.xforce.ibmcloud.com / vulnerabilities/28890
issues.rpath.com / browse/RPL-614
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9454
sunsolve.sun.com / search/document.do
support.avaya.com / elmodocs2/security/ASA-2006-190.htm
support.avaya.com / elmodocs2/security/ASA-2006-191.htm
debian.org / security/2006/dsa-1193
idefense.com / intelligence/vulnerabilities/display.php
PatchVendor Advisory
mandriva.com / security/advisories
novell.com / linux/security/advisories/2006_23_sr.html
redhat.com / support/errata/RHSA-2006-0665.html
PatchVendor Advisory
redhat.com / support/errata/RHSA-2006-0666.html
PatchVendor Advisory
securityfocus.com / archive/1/445812/100/0/threaded
securityfocus.com / archive/1/464268/100/0/threaded
securityfocus.com / bid/19974
ubuntu.com / usn/usn-344-1
vmware.com / support/esx25/doc/esx-254-200702-patch.html
vupen.com / english/advisories/2006/3581
vupen.com / english/advisories/2006/3582
vupen.com / english/advisories/2007/0322
vupen.com / english/advisories/2007/1171