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Vulnerability · Published Dec 31, 2025 · Assigned by zdi

CVE-2025-15270FontForge SFD File Parsing Improper Validation of Array Index Remote Code Execution Vulnerability

High 8.8

In plain English

A high-severity security flaw in FontForge from FontForge. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 49% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.0)8.8High
Exploit odds (30 days)0.6%top 50.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:10fontforge20230101-15.el10_1ALSA-2026:6631
AlmaLinux:8fontforge20200314-7.el8_10ALSA-2026:7677
AlmaLinux:9fontforge20201107-8.el9_7ALSA-2026:6628
Debian:12fontforgeno fix listedDEBIAN-CVE-2025-15270
Debian:13fontforgeno fix listedDEBIAN-CVE-2025-15270
Debian:14fontforgeno fix listedDEBIAN-CVE-2025-15270
Rocky Linux:10fontforge0:20230101-15.el10_1RLSA-2026:6631
Rocky Linux:8fontforge0:20200314-7.el8_10RLSA-2026:7677
Rocky Linux:9fontforge0:20201107-8.el9_7RLSA-2026:6628
Ubuntu:22.04:LTSfontforgeno fix listedUBUNTU-CVE-2025-15270
Ubuntu:24.04:LTSfontforgeno fix listedUBUNTU-CVE-2025-15270
Ubuntu:25.10fontforgeno fix listedUBUNTU-CVE-2025-15270
Ubuntu:26.04:LTSfontforgeno fix listedUBUNTU-CVE-2025-15270
Ubuntu:26.10fontforgeno fix listedUBUNTU-CVE-2025-15270

Affected products (as reported)

VendorProductVersions
FontForge FontForge aca4f524c6cb14cdc7bc4cd493492a33f5154797

Weakness: CWE-129 · Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References