CVE-2021-21417

MEDIUM EPSS 56.4%
Published Apr 29, 20215y ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Apr 29, 2021 5y ago
Last Modified Jun 17, 2026 2w ago

Description

fluidsynth is a software synthesizer based on the SoundFont 2 specifications. A use after free violation was discovered in fluidsynth, that can be triggered when loading an invalid SoundFont file.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
56.4% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 2

VendorProductVersionRange
fluidsynthfluidsynth* <2.1.8
debiandebian_linux9.0any

References 4

  • github.com https://github.com/FluidSynth/fluidsynth/issues/808
    ExploitThird Party Advisory
  • github.com https://github.com/FluidSynth/fluidsynth/pull/810
    ExploitIssue TrackingPatchThird Party Advisory
  • github.com https://github.com/FluidSynth/fluidsynth/security/advisories/GHSA-6fcq-pxhc-jxc9
    Third Party Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2021/06/msg00027.html
    Mailing ListThird Party Advisory

Remediation

  • github.com https://github.com/FluidSynth/fluidsynth/pull/810
    ExploitIssue TrackingPatchThird Party Advisory