CVE-2020-20891

Buffer Overflow vulnerability in function config_input in libavfilter/vf_gblur.c in Ffmpeg 4.2.1, allows attackers to cause a Denial of Service or other unspecified impacts.

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

64a805883d7223c868a683f0030837d859edd2ab

Database specific

Show details

{
    "extracted_events":  [
        {
            "cpe":  "cpe:2.3:a:ffmpeg:ffmpeg:4.2.1:*:*:*:*:*:*:*",
            "range":  [
                {
                    "introduced":  "4.2.1"
                },
                {
                    "last_affected":  "4.2.1"
                }
            ],
            "source":  "CPE_STRING"
        },
        {
            "range":  [
                {
                    "fixed":  "64a805883d7223c868a683f0030837d859edd2ab"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        }
    ]
}

Affected versions

4.*

4.2.1

n4.*

n4.2.1

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-20891.json"

vanir_signatures

[
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "5812123969433413664749728480812895768",
            "length":  786
        },
        "id":  "CVE-2020-20891-8616516e",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://git.ffmpeg.org/ffmpeg.git@64a805883d7223c868a683f0030837d859edd2ab",
        "target":  {
            "file":  "libavfilter/vf_gblur.c",
            "function":  "config_input"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "140308164302456955343886306517915745377",
                "6860359504303513529012831916119332737",
                "138465174164862388458175076057970697104",
                "46195152818601170111770941279977943669"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2020-20891-e354d7de",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://git.ffmpeg.org/ffmpeg.git@64a805883d7223c868a683f0030837d859edd2ab",
        "target":  {
            "file":  "libavfilter/vf_gblur.c"
        }
    }
]

vanir_signatures_modified

"2026-10-22T07:19:01Z"