CVE-2025-56225: Null Pointer Dereference
Published Jan 9, 2026
·Updated
fluidsynth-2.4.6 and earlier versions is vulnerable to Null pointer dereference in fluidsynthmonopoly.c, that can be triggered when loading an invalid midi file.
Affected Software
2 affected components
fluidsynth/fluidsynth<=2.4.6
fluidsynth fluidsynth<=2.4.6
Event History
Jan 9, 2026
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
Description
Data Sourced
via NVD·04:16 PM
DescriptionSeverityWeaknessAffected Software
Frequently Asked Questions
1
What is the severity of CVE-2025-56225?
CVE-2025-56225 is classified as a medium severity vulnerability due to the potential for denial of service caused by a null pointer dereference.
2
How do I fix CVE-2025-56225?
To fix CVE-2025-56225, upgrade FluidSynth to version 2.4.7 or later where the vulnerability has been addressed.
3
What impact does CVE-2025-56225 have on affected systems?
CVE-2025-56225 can lead to application crashes when handling invalid MIDI files, resulting in a denial of service.
4
Which versions of FluidSynth are affected by CVE-2025-56225?
FluidSynth versions 2.4.6 and earlier are affected by CVE-2025-56225.
5
Is there a workaround for CVE-2025-56225 before applying the patch?
Currently, there are no specific workarounds for CVE-2025-56225; the most effective solution is to upgrade to the patched version.