CVE-2025-15279CWE-122

FontForge GUtils BMP File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability

High · published December 31, 2025

CVSS v3.0
7.8
EPSS
0%
Percentile
20.6
In the wild
Unconfirmed
What it is

🚨 A sneaky heap-based buffer overflow lurks in FontForge's BMP file parsing, and it only takes one wrong click to let attackers execute arbitrary code! ⚡ Think of it like a crowded restaurant where the waiter serves a dish that doesn't fit on the table — when too much is forced in, everything spills over, creating chaos! 🥴 If an unsuspecting user opens a malicious BMP file or visits a harmful page, an attacker could gain control of their system, potentially stealing sensitive information or wreaking havoc. This could lead to data breaches or system instability — absolutely devastating! 😱

Put simply

Think of it like a crowded restaurant where the waiter serves a dish that doesn't fit on the table — when too much is forced in, everything spills over, creating chaos! 🥴 This vulnerability arises from a lack of validation of the length of user-supplied data before copying it to a heap-based buffer during BMP file parsing in FontForge, allowing arbitrary code execution in the context of the current user.

What to do

If an unsuspecting user opens a malicious BMP file or visits a harmful page, an attacker could gain control of their system, potentially stealing sensitive information or wreaking havoc. This could lead to data breaches or system instability — absolutely devastating! 😱 Ensure that you update FontForge to the latest version as soon as patches are available. Additionally, implement a strict policy that discourages opening untrusted BMP files and regularly educate users on potential threats. ⚠️ You've got this! By following these steps, you can keep your systems secure and earn your security hero status! 🛡️

The record
Technical detail
CVSS v3.0
7.8 · HIGH
Vector
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00291 · 20.6th percentile
Weakness
CWE-122 · Heap-based Buffer Overflow
Published
2025-12-31T06:59Z
EPSS history
Timeline
  • 31 DEC 06:59Z
    FontForge GUtils BMP File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability
    cvelistv5