CVE-2026-66041

FFmpeg 7.0 through 8.1.2, fixed in commit 4da9812, contains a heap out-of-bounds write vulnerability in the vf_quirc filter that allows an attacker to corrupt heap memory by supplying a crafted PGS/SUP subtitle file with mismatched frame dimensions. Attackers can provide a subtitle file whose second presentation has larger dimensions than its first, causing av_image_copy_plane() to copy data exceeding the initial allocation size into the undersized libquirc grayscale image buffer, resulting in heap corruption and process crash with potential for code execution.

Database specific

{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-787"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66041.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "introduced": "7.0"
                },
                {
                    "last_affected": "8.1.2"
                }
            ],
            "source": "AFFECTED_FIELD"
        },
        {
            "extracted_events": [
                {
                    "introduced": "7.0"
                },
                {
                    "last_affected": "8.1.2"
                }
            ],
            "source": "CPE_FIELD"
        },
        {
            "extracted_events": [
                {
                    "introduced": "7.0"
                },
                {
                    "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

083443d67cb159ce469e5d902346b8d0c2cd1c93

Last Affected

38b88335f99e76ed89ff3c93f877fdefce736c13

Database specific

Show details

{
    "cpe": "cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "7.0"
        },
        {
            "last_affected": "8.1.2"
        }
    ],
    "source": "CPE_RANGE"
}

Database specific

source

"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-66041.json"

Git / github.com/ffmpeg/ffmpeg

Affected ranges

Type

GIT

Repo

https://github.com/ffmpeg/ffmpeg

Events

Introduced

083443d67cb159ce469e5d902346b8d0c2cd1c93

Last Affected

38b88335f99e76ed89ff3c93f877fdefce736c13

Database specific

Show details

{
    "cpe": "cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "7.0"
        },
        {
            "last_affected": "8.1.2"
        }
    ],
    "source": "CPE_RANGE"
}

Database specific

source

"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-66041.json"