CVE-2020-20896

An issue was discovered in function latm_write_packet 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

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

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"

vanir_signatures

[
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "289650723740617240047631253826052269792",
                "50140283604854964284110220465205697211",
                "129133804975535101787841081332085239044",
                "258251669415981779699188875724056740232"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2020-20896-11f4b120",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://git.ffmpeg.org/ffmpeg.git@dd01947397b98e94c3f2a79d5820aaf4594f4d3b",
        "target":  {
            "file":  "libavformat/latmenc.c"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "233672656897557032709782832246145849603",
            "length":  1772
        },
        "id":  "CVE-2020-20896-e21d234a",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://git.ffmpeg.org/ffmpeg.git@dd01947397b98e94c3f2a79d5820aaf4594f4d3b",
        "target":  {
            "file":  "libavformat/latmenc.c",
            "function":  "latm_write_packet"
        }
    }
]

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

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

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"