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CVE-2001-0955

18
FAUCET Score

CVE-2001-0955 describes a buffer overflow vulnerability in the fbglyph.c component of XFree86 versions prior to 4.2.0, specifically impacting the x11r6 product. This flaw, stemming from glyph clipping with large origins, could be triggered by a large number of characters, potentially via web page search forms or xterm commands with long titles. With a CVSS score of 7.2 (HIGH), successful exploitation could lead to a denial of service and potentially privilege escalation, requiring local access. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
4.0CPE matchmatch criteria
cpe:2.3:a:xfree86_project:x11r6:4.0:*:*:*:*:*:*:*
4.0.1CPE matchmatch criteria
cpe:2.3:a:xfree86_project:x11r6:4.0.1:*:*:*:*:*:*:*
4.0.3CPE matchmatch criteria
cpe:2.3:a:xfree86_project:x11r6:4.0.3:*:*:*:*:*:*:*

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
0.45%
Probability of exploitation in next 30 days
EPSS Percentile
37.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0045 is in the 55th 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

Remediation records are not available for this CVE.

References

cvsweb.xfree86.org / cvsweb/xc/programs/Xserver/fb/fbglyph.c
marc.info
marc.info
marc.info
exchange.xforce.ibmcloud.com / vulnerabilities/7673
exchange.xforce.ibmcloud.com / vulnerabilities/7683
securityfocus.com / bid/3657
PatchVendor Advisory
securityfocus.com / bid/3663
Vendor Advisory
xfree86.org / 4.2.0/RELNOTES2.html
xfree86.org / security