CVE-2026-64834

FFmpeg versions 0.6.3 through 8.1.2 contain an infinite loop vulnerability in the RTP/ASF demuxer within libavformat/rtpdec_asf.c that allows remote attackers to cause denial of service by sending a crafted RTP/ASF stream. The rtp_asf_fix_header function fails to validate a minimum chunksize when iterating over ASF objects, causing the loop pointer to never advance when a chunksize is smaller than the 24-byte minimum ASF object header size, resulting in CPU exhaustion that denies service to legitimate users.

Database specific

{
    "cna_assigner":  "VulnCheck",
    "cwe_ids":  [
        "CWE-835"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64834.json",
    "unresolved_ranges":  [
        {
            "extracted_events":  [
                {
                    "introduced":  "0.6.3"
                },
                {
                    "last_affected":  "8.1.2"
                },
                {
                    "introduced":  "11d5f475be95d22d5f0692220cc772b116abc632"
                },
                {
                    "last_affected":  "11d5f475be95d22d5f0692220cc772b116abc632"
                }
            ],
            "source":  "AFFECTED_FIELD"
        },
        {
            "extracted_events":  [
                {
                    "introduced":  "0.6.3"
                },
                {
                    "last_affected":  "8.1.2"
                }
            ],
            "source":  "CPE_FIELD"
        },
        {
            "extracted_events":  [
                {
                    "introduced":  "0.6.3"
                },
                {
                    "fixed":  "8.1.2"
                }
            ],
            "source":  "DESCRIPTION"
        }
    ]
}

References

Affected packages

Git / git.ffmpeg.org/ffmpeg.git

Affected ranges

Type

GIT

Repo

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

Events

Introduced

ace432f62cdcedf812e7c4d77fc5b03322170fa8

Last Affected

38b88335f99e76ed89ff3c93f877fdefce736c13

Database specific

Show details

{
    "cpe":  "cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:*",
    "extracted_events":  [
        {
            "introduced":  "0.6.3"
        },
        {
            "last_affected":  "8.1.2"
        }
    ],
    "source":  "CPE_RANGE"
}

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64834.json"

Git / github.com/ffmpeg/ffmpeg

Affected ranges

Type

GIT

Repo

https://github.com/ffmpeg/ffmpeg

Events

Introduced

ace432f62cdcedf812e7c4d77fc5b03322170fa8

Last Affected

38b88335f99e76ed89ff3c93f877fdefce736c13

Database specific

Show details

{
    "cpe":  "cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:*",
    "extracted_events":  [
        {
            "introduced":  "0.6.3"
        },
        {
            "last_affected":  "8.1.2"
        }
    ],
    "source":  "CPE_RANGE"
}

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64834.json"