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CVE-2020-25690

An out-of-bounds write flaw was found in FontForge in versions before 20200314 while parsing SFD...

8.8 HighFix available

An out-of-bounds write flaw was found in FontForge in versions before 20200314 while parsing SFD files containing certain LayerCount tokens. This flaw allows an attacker to manipulate the memory allocated on the heap, causing the application to crash or execute arbitrary code. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
Required

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

1.34%Up 0.6 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 8.8

An out-of-bounds write flaw was found in FontForge in versions before 20200314 while parsing SFD files containing certain LayerCount tokens. This flaw allows an attacker to manipulate the memory allocated on the heap, causing the application to crash or execute arbitrary code. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Record
CVE-2020-25690
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.0
6.8 MediumAV:N/AC:M/Au:N/C:P/I:P/A:P
Weakness
CWE-119
Updated
2026-11-02
CVE List No score

An out-of-bounds write flaw was found in FontForge in versions before 20200314 while parsing SFD files containing certain LayerCount tokens. This flaw allows an attacker to manipulate the memory allocated on the heap, causing the application to crash or execute arbitrary code. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Record
CVE-2020-25690
Weakness
CWE-119
Updated
2026-11-02
EUVDEUVD-2020-18351 No score

An out-of-bounds write flaw was found in FontForge in versions before 20200314 while parsing SFD files containing certain LayerCount tokens. This flaw allows an attacker to manipulate the memory allocated on the heap, causing the application to crash or execute arbitrary code. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Record
EUVD-2020-18351
Updated
2026-11-03
GitHub AdvisoriesGHSA-8m73-qxc4-m26m No score

An out-of-bounds write flaw was found in FontForge in versions before 20200314 while parsing SFD...

An out-of-bounds write flaw was found in FontForge in versions before 20200314 while parsing SFD files containing certain LayerCount tokens. This flaw allows an attacker to manipulate the memory allocated on the heap, causing the application to crash or execute arbitrary code. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Record
GHSA-8m73-qxc4-m26m
Weakness
CWE-119
Updated
2026-11-02
OSV 8.8

An out-of-bounds write flaw was found in FontForge in versions before 20200314 while parsing SFD files containing certain LayerCount tokens. This flaw allows an attacker to manipulate the memory allocated on the heap, causing the application to crash or execute arbitrary code. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Record
CVE-2020-25690
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVOESA-2021-1104 8.8

fontforge security update

Mozilla fontforge is an open-source web browser, designed for standards compliance, performance and portability.

Security Fix(es):

An out-of-bounds write flaw was found in FontForge in versions before 20200314 while parsing SFD files containing certain LayerCount tokens. This flaw allows an attacker to manipulate the memory allocated on the heap, causing the application to crash or execute arbitrary code. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.(CVE-2020-25690)

Record
OESA-2021-1104
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
Show 6 moreShow less
OSVRHSA-2020:4844 8.8

Red Hat Security Advisory: fontforge security update

Record
RHSA-2020:4844
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2020-25690 8.8

An out-of-bounds write flaw was found in FontForge in versions before 20200314 while parsing SFD files containing certain LayerCount tokens. This flaw allows an attacker to manipulate the memory allocated on the heap, causing the application to crash or execute arbitrary code. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Record
UBUNTU-CVE-2020-25690
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVALSA-2020:4844 No score

Moderate: fontforge security update

FontForge is a font editor for outline and bitmap fonts. It supports a range of font formats, including PostScript (ASCII and binary Type 1, some Type 3 and Type 0), TrueType, OpenType (Type2) and CID-keyed fonts.

Security Fix(es):

  • fontforge: SFD_GetFontMetaData() insufficient CVE-2020-5395 backport (CVE-2020-25690)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.

Record
ALSA-2020:4844
Updated
2026-11-02
OSVMGASA-2020-0405 No score

Updated fontforge packages fix a security vulnerability

SFD_GetFontMetaData() insufficient CVE-2020-5395 backport. (CVE-2020-25690)

Record
MGASA-2020-0405
Updated
2026-11-02
OSVopenSUSE-SU-2020:2111-1 No score

Security update for fontforge

This update for fontforge fixes the following issues:

  • fix for Use-after-free (heap) in the SFD_GetFontMetaData() function and the crash (bsc#1178308 CVE-2020-25690).

This update was imported from the SUSE:SLE-15:Update update project.

Record
openSUSE-SU-2020:2111-1
Updated
2026-11-02
OSVSUSE-SU-2020:3628-1 No score

Security update for fontforge

This update for fontforge fixes the following issues:

  • fix for Use-after-free (heap) in the SFD_GetFontMetaData() function and the crash (bsc#1178308 CVE-2020-25690).
Record
SUSE-SU-2020:3628-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
fontforge
AlmaLinux:8
From an advisory covering 2 CVEs
 before 20170731-15.el8
20170731-15.el8
fontforge
Mageia:7
 before 20190413-1.2.mga7
20190413-1.2.mga7
fontforge
openEuler:20.03-LTS
 before 20200314-2.oe1
20200314-2.oe1
fontforge
Red Hat:enterprise_linux:8::crb
 before 0:20170731-15.el8
0:20170731-15.el8
fontforge-debuginfo
Red Hat:enterprise_linux:8::crb
 before 0:20170731-15.el8
0:20170731-15.el8
fontforge-debugsource
Red Hat:enterprise_linux:8::crb
 before 0:20170731-15.el8
0:20170731-15.el8
fontforge
SUSE:Linux Enterprise Software Development Kit 12 SP5
From an advisory covering 2 CVEs
 before 20170731-11.14.1
20170731-11.14.1
fontforge
Ubuntu:Pro:16.04:LTS
 All versions, plus listed versions
20120731.b-520120731.b-5ubuntu120120731.b-7.120120731.b-7.1ubuntu0.120120731.b-7.1ubuntu0.1+esm1
 None known
fontforge
Ubuntu:Pro:18.04:LTS
 All versions, plus listed versions
1:20161005~dfsg-4+deb9u1ubuntu11:20170731~dfsg-11:20170731~dfsg-1ubuntu0.1~esm1
 None known
fontforge
Ubuntu:20.04:LTS
 All versions, plus listed versions
1:20170731~dfsg-1build11:20170731~dfsg-21:20190801~dfsg-21:20190801~dfsg-2ubuntu11:20190801~dfsg-41:20190801~dfsg-4ubuntu0.1
 None known
Show 6 moreShow less
Affected packages
PackageAffectedFixed
fontforge
Ubuntu:22.04:LTS
 All versions, plus listed versions
1:20201107~dfsg-41:20201107~dfsg-4build11:20201107~dfsg-4+deb11u1build0.22.04.1
 None known
fontforge
Ubuntu:24.04:LTS
 All versions, plus listed versions
1:20230101~dfsg-1build11:20230101~dfsg-1build21:20230101~dfsg-1.11:20230101~dfsg-1.1build1
 None known
fontforge
Ubuntu:25.10
 All versions, plus listed versions
1:20230101~dfsg-4build11:20230101~dfsg-4build21:20230101~dfsg-71:20230101~dfsg-8
 None known
fontforge
Ubuntu:26.10
 All versions, plus listed versions
1:20230101~dfsg-8build11:20230101~dfsg-91:20251009+git20260808~dfsg-2
 None known
fontforge
Ubuntu:26.04:LTS
 All versions, plus listed versions
1:20230101~dfsg-81:20230101~dfsg-8build1
 None known
fontforge
openSUSE:Leap 15.1
From an advisory covering 2 CVEs
 before 20170731-lp151.4.6.1
20170731-lp151.4.6.1

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-25690 is a high vulnerability (CVSS 8.8) in Fontforge, published November 3, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.34%, the 71st percentile. Fixed in fontforge 20190413-1.2.mga7.

References

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