Description
FontForge SFD File Parsing Improper Validation of Array Index Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of FontForge. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.
The specific flaw exists within the parsing of SFD files. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated array. An attacker can leverage this vulnerability to execute code in the context of the current user. Was ZDI-CAN-28563.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| FontForge | FontForge | aca4f524c6cb14cdc7bc4cd493492a33f5154797 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | fontforge | No fix yet | — |
| Debian 13 | fontforge | No fix yet | — |
| Debian 12 | fontforge | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | fontforge | No fix yet | — |
| Ubuntu 26.04 LTS | fontforge | No fix yet | — |
| Ubuntu 25.10 | fontforge | No fix yet | — |
| Ubuntu 24.04 LTS | fontforge | No fix yet | — |
| Ubuntu 22.04 LTS | fontforge | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | fontforge | No fix yet | — |
| Ubuntu Pro 18.04 LTS | fontforge | No fix yet | — |
| Ubuntu Pro 16.04 LTS | fontforge | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | fontforge | 20230101-15.el10_1 | RHSA-2026:6631 |
| RHEL 9 | fontforge | 20201107-8.el9_7 | RHSA-2026:6628 |
| RHEL 8 | fontforge | 20200314-7.el8_10 | RHSA-2026:7677 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10.0 EUS | fontforge | 20230101-15.el10_0 | RHSA-2026:8875 |
| RHEL 9.6 EUS | fontforge | 20201107-8.el9_6 | RHSA-2026:6635 |
| RHEL 9.4 EUS | fontforge | 20201107-7.el9_4 | RHSA-2026:7001 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | fontforge | 20230101-15.el10_1 | ALSA-2026:6631 |
| AlmaLinux 9 | fontforge | 20201107-8.el9_7 | ALSA-2026:6628 |
| AlmaLinux 8 | fontforge | 20200314-7.el8_10 | ALSA-2026:7677 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | fontforge | 20230101-15.el10_1 | RLSA-2026:6631 |
| Rocky Linux 9 | fontforge | 20201107-8.el9_7 | RLSA-2026:6628 |
| Rocky Linux 8 | fontforge | 20200314-7.el8_10 | RLSA-2026:7677 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | fontforge | 20251009-6.1 | openSUSE-SU-2026:10513-1 |
| openSUSE Leap 16.0 | fontforge | 20251009-160000.2.1 | openSUSE-SU-2026:20608-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | fontforge +2 | 20201107-3.amzn2023.0.6 | ALAS2023-2026-1431 |
| Amazon Linux 2 | fontforge +1 | 20120731b-13.amzn2.0.5 | ALAS2-2026-3164 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | fontforge | 20230101-15.el10_1 | ELSA-2026-6631 |
| Oracle Linux 9 | fontforge | 20201107-8.el9_7 | ELSA-2026-6628 |
| Oracle Linux 8 | fontforge | 20200314-7.el8_10 | ELSA-2026-7677 |
Advisories 20
- ALSA-2026:6631 Important: fontforge security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:6628 Important: fontforge security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:7677 Important: fontforge security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2026:8875 Red Hat Security Advisory: fontforge security update Red Hat Security Advisories (RHSA) · Jul 9, 2026
- RHSA-2026:7677 Red Hat Security Advisory: fontforge security update Red Hat Security Advisories (RHSA) · Jul 9, 2026
- RHSA-2026:7001 Red Hat Security Advisory: fontforge security update Red Hat Security Advisories (RHSA) · Jul 9, 2026
- RHSA-2026:6635 Red Hat Security Advisory: fontforge security update Red Hat Security Advisories (RHSA) · Jul 9, 2026
- RHSA-2026:6628 Red Hat Security Advisory: fontforge security update Red Hat Security Advisories (RHSA) · Jul 9, 2026
- RHSA-2026:6631 Red Hat Security Advisory: fontforge security update Red Hat Security Advisories (RHSA) · Jul 9, 2026
- WID-SEC-2026-0967 Red Hat Enterprise Linux (fontforge): Schwachstelle ermöglicht Codeausführung BSI CERT-Bund (WID) · Apr 28, 2026
- openSUSE-SU-2026:20608-1 Security update for fontforge SUSE / openSUSE Security Updates · Apr 24, 2026
- RLSA-2026:7677 Important: fontforge security update Rocky Linux Security Advisories · Apr 14, 2026
- ELSA-2026-7677 Important: fontforge security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Apr 14, 2026
- openSUSE-SU-2026:10513-1 fontforge-20251009-6.1 on GA media SUSE / openSUSE Security Updates · Apr 10, 2026
- RLSA-2026:6631 Important: fontforge security update Rocky Linux Security Advisories · Apr 9, 2026
- RLSA-2026:6628 Important: fontforge security update Rocky Linux Security Advisories · Apr 8, 2026
- ELSA-2026-6631 Important: fontforge security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Apr 7, 2026
- ELSA-2026-6628 Important: fontforge security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Apr 6, 2026
- ALAS2-2026-3164 Important: fontforge security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Feb 18, 2026
- ALAS2023-2026-1431 Important: fontforge security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Feb 18, 2026