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Vulnerability DatabaseCVE-2025-50951
CVE-2025-50951:
NixOS vulnerability analysis and mitigation
Overview
FontForge version 20230101 was discovered to contain a memory leak vulnerability (CVE-2025-50951) in the utf7toutf8_copy function located at /fontforge/sfd.c. The vulnerability was disclosed on October 23, 2025 (NVD).
Technical details
The vulnerability is a memory leak issue in the utf7toutf8_copy function. According to the LeakSanitizer analysis, there is a direct leak of 140 bytes in 4 objects allocated from the malloc function. The vulnerability has been assigned a CVSS 3.1 base score of 6.5 (Medium) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H (Ubuntu).
Impact
The vulnerability can lead to a Denial of Service condition due to memory resource exhaustion. The CVSS scoring indicates that while there is no impact on confidentiality or integrity, there is a high impact on availability (Ubuntu).
Mitigation and workarounds
A fix has been implemented and merged into the FontForge master branch through pull request #5495. Users are advised to upgrade to versions after 20230101 which contain the fix (GitHub PR).
Additional resources
Source: This report was generated using AI
Related NixOS vulnerabilities:
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