CVE-2025-56225

Name: CVE-2025-56225
Creator: NVD / NIST
Published: 2026-01-09T16:16:06.91+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.41%

Last modified Jun 17, 2026

CVE-2025-56225 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. fluidsynth-2.4.6 and earlier versions is vulnerable to Null pointer dereference in fluid_synth_monopoly.c, that can be triggered when loading an invalid midi file.. EPSS estimates a 0.41% chance of exploitation in the next 30 days.

Description

fluidsynth-2.4.6 and earlier versions is vulnerable to Null pointer dereference in fluid_synth_monopoly.c, that can be triggered when loading an invalid midi file.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.41%

33.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-476

Affected Software

Vendor	Product	Versions
Fluidsynth	Fluidsynth	<= 2.4.6

References

https://github.com/FluidSynth/fluidsynth/issues/1602Exploit, Issue Tracking
https://github.com/FluidSynth/fluidsynth/pull/1607Issue Tracking
https://github.com/FluidSynth/fluidsynth/issues/1602Exploit, Issue Tracking

Timeline

Published: Jan 9, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-56225?

fluidsynth-2.4.6 and earlier versions is vulnerable to Null pointer dereference in fluid_synth_monopoly.c, that can be triggered when loading an invalid midi file.

How severe is CVE-2025-56225?

CVE-2025-56225 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.41% probability of exploitation in the next 30 days.

How do I fix CVE-2025-56225?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-56225?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST