What is CVE-2017-11576?

CVE-2017-11576 is a medium-severity vulnerability in Fontforge, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.5/10. Published 2017-07-23.

How severe is CVE-2017-11576?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Buffer overflow in Fontforge

CVE-2017-11576

FontForge 20161012 does not ensure a positive size in a weight vector memcpy call in readcfftopdict (parsettf.c) resulting in DoS via a crafted otf file.

Vulnerability class: Buffer Overflow

Published 2017-07-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.007 (51.8th percentile), scored 2026-10-06.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 51.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Fontforge — versions 20161012

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

References

www.debian.org/security/2017/dsa-3958 (vendor-advisory)
github.com/fontforge/fontforge/issues/3091 (Patch, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2017-11576?: CVE-2017-11576 is a medium-severity vulnerability in Fontforge, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.5/10. Published 2017-07-23.
How severe is CVE-2017-11576?: Medium severity. CVSS v3 base score is 5.5 out of 10.