NULL Pointer Dereference Affecting fluidsynth/fluidsynth package, versions [,2.4.7)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-UNMANAGED-FLUIDSYNTHFLUIDSYNTH-14912576
- published11 Jan 2026
- disclosed9 Jan 2026
- creditSisyphus-wang
Introduced: 9 Jan 2026
CVE-2025-56225 (opens in a new tab)How to fix?
Upgrade fluidsynth/fluidsynth to version 2.4.7 or higher.
Overview
Affected versions of this package are vulnerable to NULL Pointer Dereference via the fluid_synth_noteoff_mono_LOCAL function in the fluid_synth_monopoly.c file. An attacker can cause a crash and denial of service by loading a specially crafted invalid midi file.