CVE-2001-0955

7.2 HIGH 0.5% exploit odds Fix listed

What it is

Buffer overflow in fbglyph.c in XFree86 before 4.2.0, related to glyph clipping for large origins, allows attackers to cause a denial of service and possibly gain privileges via a large number of characters, possibly through the web page search form of KDE Konqueror or from an xterm command with a long title.

At a glance

Exploitability: Can be exploited locally on the machine without logging in. High risk of data exposure, data tampering, service disruption.
Exploit odds: 0.5% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2001-09-22 04:00 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-16 21:55 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 0.5% in the next 30 days (EPSS).
Severity: 7.2 HIGH (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2001-09-22 04:00 UTC
Last modified: 2026-06-16 21:55 UTC
Exploit probability: 0.5% · EPSS, next 30 days
Record status: Modified

Affected

xfree86 Project x11r6 4.0
xfree86 Project x11r6 4.0.1
xfree86 Project x11r6 4.0.3

Attack profile CVSS 2.0 · 7.2

Attack vector: Local
Complexity: Low
Authentication: None
Confidentiality: Complete
Integrity: Complete
Availability: Complete

Raw vector

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

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2001-0955.md and follow it. Check whether this project is affected by CVE-2001-0955. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record