CVE Vulnerabilities

CVE-2021-21417

Use After Free

Published: Apr 29, 2021 | Modified: Nov 21, 2024
CVSS 3.x
5.5
MEDIUM
Source:
NVD
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS 2.x
4.3 MEDIUM
AV:N/AC:M/Au:N/C:N/I:N/A:P
RedHat/V2
RedHat/V3
Ubuntu
MEDIUM

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.

Weakness

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.

Affected Software

Name Vendor Start Version End Version
Fluidsynth Fluidsynth * 2.1.8 (excluding)
Fluidsynth Ubuntu bionic *
Fluidsynth Ubuntu focal *
Fluidsynth Ubuntu groovy *
Fluidsynth Ubuntu hirsute *
Fluidsynth Ubuntu impish *
Fluidsynth Ubuntu kinetic *
Fluidsynth Ubuntu trusty *
Fluidsynth Ubuntu trusty/esm *
Fluidsynth Ubuntu upstream *
Fluidsynth Ubuntu xenial *

Potential Mitigations

References