Heap Buffer Overflow in DICOM Image Decoder via VR UL Dimensions_CVE-2026-5442

{
    "lastseen": "",
    "description": "A heap buffer overflow vulnerability exists in the DICOM image decoder. Dimension fields are encoded using Value Representation (VR) Unsigned Long (UL), instead of the expected VR Unsigned Short (US), which allows extremely large dimensions to be processed. This causes an integer overflow during frame size calculation and results in out-of-bounds memory access during image decoding.",
    "published": "2026-04-09T14:43:43.571Z",
    "modified": "2026-04-14T16:34:39.322Z",
    "type": "cve",
    "title": "Heap Buffer Overflow in DICOM Image Decoder via VR UL Dimensions",
    "source": "certcc",
    "references": "https://www.orthanc-server.com/\nhttps://www.machinespirits.de/\nhttps://kb.cert.org/vuls/id/536588",
    "id": "CVE-2026-5442",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Orthanc DICOM Server 0",
    "sourceHref": "",
    "cvss": {
        "score": 9.8,
        "severity": "CRITICAL",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "DICOM Server",
    "version": "0",
    "vendor": "Orthanc",
    "ai_description": "Heap buffer overflow in DICOM image decoder via VR UL dimensions",
    "ai_severity": "Critical",
    "ai_vendor": "Orthanc",
    "ai_product": "DICOM Server",
    "ai_version": "0",
    "ai_score": 9.8
}