CVE-2021-21417

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Source
https://cve.org/CVERecord?id=CVE-2021-21417
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-21417.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2021-21417
Aliases
  • GHSA-6fcq-pxhc-jxc9
Downstream
Published
2021-04-29T17:15:09Z
Modified
2026-08-18T13:55:36Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

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.

Database specific 
{
    "unresolved_ranges":  [
        {
            "cpes":  [
                "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
            ],
            "extracted_events":  [
                {
                    "introduced":  "9.0"
                },
                {
                    "last_affected":  "9.0"
                }
            ],
            "source":  "CPE_STRING",
            "vendor_product":  "debian:debian_linux"
        }
    ]
}
References

Affected packages

Git / github.com/fluidsynth/fluidsynth

Affected ranges

Type
GIT
Repo
https://github.com/fluidsynth/fluidsynth
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
005719628aef0bd48dc7b2f860c7e4ca16b81044
Database specific
Show details 
{
    "cpe":  "cpe:2.3:a:fluidsynth:fluidsynth:*:*:*:*:*:*:*:*",
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "fixed":  "2.1.8"
        }
    ],
    "source":  "CPE_RANGE"
}

Affected versions

v1.*
v1.1.2
v1.1.3
v1.1.4
v1.1.5
v1.1.6
v2.*
v2.0.0
v2.0.0.beta1
v2.0.0.beta2
v2.0.0.rc1
v2.0.1
v2.0.2
v2.1.0
v2.1.0.rc1
v2.1.1
v2.1.2
v2.1.3
v2.1.4
v2.1.5
v2.1.6
v2.1.7

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-21417.json"
vanir_signatures 
[
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "48885938282331019127197626419836307014",
                "110753109995881962928445110041674456256",
                "121492536121844320821012634259806870192",
                "244250008653137373573258873778707470889",
                "110481844234258377108205728634290871755",
                "106434345867872264672328437380783120138",
                "75442270675680468273110843789053691131",
                "95798495319292279337806353917834424064",
                "333074141710635353878506192750459148821",
                "47326553705705572167105152637548941869",
                "16808106559652375976008750122874879042",
                "172764031837794924691065524078847990979",
                "220534147200632390022598891401921673442",
                "13850095192963669915694205988520717420",
                "236778933972772207078581007412662589462",
                "318383126056721000529860358731732644709",
                "85476600705861003317693399597125986122",
                "288936857336585327545519535369585347744",
                "121492536121844320821012634259806870192",
                "244250008653137373573258873778707470889",
                "336122938356400900669879383199080583791",
                "322868890313760197567011974418590242518",
                "42515258426239574087291571328387395543",
                "329887052572185232004397664573681896528",
                "333074141710635353878506192750459148821",
                "160110383922649587958162413498630141605",
                "285706012640618526127375349468795119952",
                "275649253706964016154533079856786817649",
                "101735777680155907571942409117773240958",
                "11104868105589290390572019506936048960",
                "236778933972772207078581007412662589462",
                "318383126056721000529860358731732644709"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2021-21417-b2340688",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/fluidsynth/fluidsynth/commit/005719628aef0bd48dc7b2f860c7e4ca16b81044",
        "target":  {
            "file":  "src/sfloader/fluid_sffile.c"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "331369067606282572002129312609689129378",
            "length":  2846
        },
        "id":  "CVE-2021-21417-cfdb3ac4",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/fluidsynth/fluidsynth/commit/005719628aef0bd48dc7b2f860c7e4ca16b81044",
        "target":  {
            "file":  "src/sfloader/fluid_sffile.c",
            "function":  "load_pgen"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "95500749034621577397607449282478807781",
            "length":  2834
        },
        "id":  "CVE-2021-21417-e6733bbb",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/fluidsynth/fluidsynth/commit/005719628aef0bd48dc7b2f860c7e4ca16b81044",
        "target":  {
            "file":  "src/sfloader/fluid_sffile.c",
            "function":  "load_igen"
        }
    }
]
vanir_signatures_modified 
"2026-08-18T13:55:36Z"