CVE-2026-66041

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Source
https://cve.org/CVERecord?id=CVE-2026-66041
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-66041.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-66041
Downstream
Related
Published
2026-07-24T19:54:11.426Z
Modified
2026-09-03T10:10:56.413142064Z
Severity
  • 7.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
FFmpeg 7.0 - 8.1.2 Heap Out-of-Bounds Write via vf_quirc Filter
Details

FFmpeg 7.0 through 8.1.2, fixed in commit 4da9812, contains a heap out-of-bounds write vulnerability in the vfquirc 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 avimagecopyplane() 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 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66041.json",
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "introduced": "7.0"
                },
                {
                    "last_affected": "8.1.2"
                }
            ]
        },
        {
            "source": "CPE_FIELD",
            "extracted_events": [
                {
                    "introduced": "7.0"
                },
                {
                    "last_affected": "8.1.2"
                }
            ]
        },
        {
            "source": "DESCRIPTION",
            "extracted_events": [
                {
                    "introduced": "7.0"
                },
                {
                    "fixed": "8.1.2"
                }
            ]
        }
    ],
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-787"
    ]
}
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 
{
    "source": "CPE_RANGE",
    "cpe": "cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "7.0"
        },
        {
            "last_affected": "8.1.2"
        }
    ]
}

Database specific

source 
"https://storage.googleapis.com/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 
{
    "source": "CPE_RANGE",
    "cpe": "cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "7.0"
        },
        {
            "last_affected": "8.1.2"
        }
    ]
}

Database specific

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