CVE-2020-20896

An issue was discovered in function latmwritepacket in libavformat/latmenc.c in Ffmpeg 4.2.1, allows attackers to cause a Denial of Service or other unspecified impacts due to a Null pointer dereference.

References

Affected packages

Git / git.ffmpeg.org/ffmpeg.git

Affected ranges

Type

GIT

Repo

https://git.ffmpeg.org/ffmpeg.git

Events

Introduced

1529dfb73a5157dcb8762051ec4c8d8341762478

Last affected

1529dfb73a5157dcb8762051ec4c8d8341762478

Fixed

dd01947397b98e94c3f2a79d5820aaf4594f4d3b

Database specific

Show details

{
    "source": [
        "CPE_STRING",
        "REFERENCES"
    ],
    "cpe": "cpe:2.3:a:ffmpeg:ffmpeg:4.2.1:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "4.2.1"
        },
        {
            "last_affected": "4.2.1"
        }
    ]
}

Affected versions

4.*

4.2.1

n4.*

n4.2.1

Database specific

vanir_signatures

[
    {
        "signature_type": "Line",
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "289650723740617240047631253826052269792",
                "50140283604854964284110220465205697211",
                "129133804975535101787841081332085239044",
                "258251669415981779699188875724056740232"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2020-20896-11f4b120",
        "target": {
            "file": "libavformat/latmenc.c"
        },
        "source": "https://git.ffmpeg.org/ffmpeg.git@dd01947397b98e94c3f2a79d5820aaf4594f4d3b",
        "signature_version": "v1"
    },
    {
        "signature_type": "Function",
        "deprecated": false,
        "digest": {
            "length": 1772.0,
            "function_hash": "233672656897557032709782832246145849603"
        },
        "id": "CVE-2020-20896-e21d234a",
        "target": {
            "function": "latm_write_packet",
            "file": "libavformat/latmenc.c"
        },
        "source": "https://git.ffmpeg.org/ffmpeg.git@dd01947397b98e94c3f2a79d5820aaf4594f4d3b",
        "signature_version": "v1"
    }
]

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-20896.json"

vanir_signatures_modified

"2026-08-17T05:26:14Z"

Git / github.com/ffmpeg/ffmpeg

Affected ranges

Type

GIT

Repo

https://github.com/ffmpeg/ffmpeg

Events

Introduced

1529dfb73a5157dcb8762051ec4c8d8341762478

Last affected

1529dfb73a5157dcb8762051ec4c8d8341762478

Database specific

Show details

{
    "source": "CPE_STRING",
    "cpe": "cpe:2.3:a:ffmpeg:ffmpeg:4.2.1:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "4.2.1"
        },
        {
            "last_affected": "4.2.1"
        }
    ]
}

Affected versions

4.*

4.2.1

n4.*

n4.2.1

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-20896.json"