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Fencer Vulns
high 8.8

CVE-2020-5395 json

FontForge 20190801 has a use-after-free in SFD_GetFontMetaData in sfd.c.

published 2020-01-03 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-26576

cvss
8.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.5%
EPSS 2.5% chance of exploitation in 30 days, percentile 84%
public exploits
0
none known

Summary

FontForge 20190801 has a use-after-free in SFD_GetFontMetaData in sfd.c.

Patch / fix

  • fontforge Debian 14, Debian 13, Debian 12 1:20201107~dfsg-1

debian advisories DEBIAN-CVE-2020-5395

  • fontforge RHEL 7 20120731b-13.el7
  • fontforge RHEL 8 20170731-14.el8

red hat advisories RHSA-2020:3966RHSA-2020:1921

  • fontforge SLE Software Development Kit 12 SP5 20170731-11.14.1
  • fontforge SLE Software Development Kit 12 SP5, SLE Software Development Kit 12 SP4 20170731-11.11.1

suse advisories SUSE-SU-2020:3628-1SUSE-SU-2020:0393-1

  • fontforge openSUSE Tumbleweed 20201107-1.6
  • fontforge openSUSE Leap 15.1 20170731-lp151.4.6.1
  • fontforge openSUSE Leap 15.1 20170731-lp151.4.3.1

opensuse advisories openSUSE-SU-2024:10763-1openSUSE-SU-2020:2111-1openSUSE-SU-2020:0089-1

  • fontforge AlmaLinux 8 20170731-15.el8

almalinux advisories ALSA-2020:4844

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-5395 updated cvss 8.8

fontforge: out-of-bounds write in SFD_GetFontMetaData function in sfd.c

  • Red Hat Enterprise Linux 6 fontforge
    affected: no fix planned “Out of support scope”
  • Red Hat CodeReady Linux Builder (v. 8) fontforge 20170731-14.el8
    fixed: vendor fix RHSA-2020:1921
  • Red Hat Enterprise Linux Client Optional (v. 7) fontforge 20120731b-13.el7 Red Hat Enterprise Linux ComputeNode Optional (v. 7) fontforge 20120731b-13.el7 Red Hat Enterprise Linux Server Optional (v. 7) fontforge 20120731b-13.el7 Red Hat Enterprise Linux Workstation Optional (v. 7) fontforge 20120731b-13.el7
    fixed: vendor fix RHSA-2020:3966

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.48% chance of exploitation in the next 30 days, higher than 84% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/fontforge/fontforge/issues/4084 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.