CVE-2026-64833

FFmpeg versions 0.7.1 through 8.1.2 contain an out-of-bounds read vulnerability in the S/PDIF muxer that allows attackers to access memory beyond buffer boundaries by supplying a crafted DTS stream with a coresize value larger than the actual packet length. Attackers can exploit the missing bounds check in the spdifheader_dts4 function by providing a malicious DTS-HD audio stream during S/PDIF re-muxing to trigger unauthorized memory reads beyond the packet buffer.

Database specific

{
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "introduced": "0.7.1"
                },
                {
                    "last_affected": "8.1.2"
                },
                {
                    "introduced": "6f80e2765492700622596af720534cef33dd31b4"
                },
                {
                    "last_affected": "6f80e2765492700622596af720534cef33dd31b4"
                }
            ],
            "source": "AFFECTED_FIELD"
        },
        {
            "extracted_events": [
                {
                    "introduced": "0.7.1"
                },
                {
                    "last_affected": "8.1.2"
                }
            ],
            "source": "CPE_FIELD"
        },
        {
            "extracted_events": [
                {
                    "introduced": "0.7.1"
                },
                {
                    "fixed": "8.1.2"
                }
            ],
            "source": "DESCRIPTION"
        }
    ],
    "cwe_ids": [
        "CWE-125"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64833.json",
    "cna_assigner": "VulnCheck"
}

References

Affected packages

Git / github.com/ffmpeg/ffmpeg

Affected ranges

Type

GIT

Repo

https://github.com/ffmpeg/ffmpeg

Events

Introduced

b7b61ff6a31d4ffa1fb9a0ebeb1579d84c01c0b7

Last affected

38b88335f99e76ed89ff3c93f877fdefce736c13

Database specific

{
    "cpe": "cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0.7.1"
        },
        {
            "last_affected": "8.1.2"
        }
    ],
    "source": "CPE_RANGE"
}

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64833.json"