Stack-Based Buffer Overflow in FontForge PFB Parsing Enables RCE

Executive Summary

CVE-2025-15273 is a remote code execution vulnerability in FontForge caused by improper validation of the length of user-supplied data when parsing PFB (Printer Font Binary) files. This flaw leads to a stack-based buffer overflow, allowing an attacker to execute arbitrary code with the privileges of the current user. Exploitation requires user interaction, such as opening a malicious file or visiting a malicious webpage. [1]

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Impact Analysis

This vulnerability can allow remote attackers to execute arbitrary code on your system with the privileges of the current user. This could lead to unauthorized actions such as installing malware, stealing data, or taking control of the affected system. Since exploitation requires user interaction, the risk arises when a user opens a malicious file or visits a malicious webpage. [1]

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Mitigation Strategies

To mitigate this vulnerability, avoid opening untrusted or suspicious PFB files and do not visit untrusted webpages that might exploit this flaw. Ensure that your FontForge installation is updated with any patches or security updates provided by the vendor once available. Additionally, consider restricting user permissions to limit the impact of potential exploitation. [1]

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