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FreeBSD : fluidsynth -- Use after free when using DLS files (bf854a37-e180-11f0-ac0c-5404a68ad561)

high Nessus Plugin ID 279987

Synopsis

The remote FreeBSD host is missing one or more security-related updates.

Description

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the bf854a37-e180-11f0-ac0c-5404a68ad561 advisory.

 The fluidsynth authors report:
 A race condition during unloading of a DLS file can trigger a heap-based use-after-free. A concurrently running thread may be pending to unload a DLS file, leading to use of freed memory, if the synthesizer is being concurrently destroyed, or samples of the (unloaded) DLS file are concurrently used to synthesize audio.
 Realistically, both scenarios will result in a denial of service.
 In worst cases, it may result in arbitrary code execution in the context of an application using FluidSynth.

Tenable has extracted the preceding description block directly from the FreeBSD security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://www.cve.org/CVERecord?id=CVE-2025-68617

http://www.nessus.org/u?7cdf688a

Plugin Details

Severity: High

ID: 279987

File Name: freebsd_pkg_bf854a37e18011f0ac0c5404a68ad561.nasl

Version: 1.1

Type: local

Published: 12/25/2025

Updated: 12/25/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: Medium

Base Score: 6.2

Temporal Score: 4.6

Vector: CVSS2#AV:L/AC:H/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2025-68617

CVSS v3

Risk Factor: High

Base Score: 7

Temporal Score: 6.1

Vector: CVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:fluidsynth, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Exploit Ease: No known exploits are available

Patch Publication Date: 12/25/2025

Vulnerability Publication Date: 12/23/2025

Reference Information

CVE: CVE-2025-68617