OpenImageIO: Signed integer overflow in SwapRGBABytes loop index leads to out-of-bounds read/write in DPX ABGR decoder_CVE-2026-43909

{
    "lastseen": "",
    "description": "OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.18.0 and 3.1.13.0, a signed 32-bit integer overflow in the loop index expression i * 4 inside SwapRGBABytes() causes the function to compute a large negative pointer offset when processing kABGR DPX images with large dimensions. The immediate crash is an out-of-bounds read (the memcpy at line 45 reads from &input[i * 4] first), but the subsequent write operations at lines 46\u201349 target the same wrapped offset \u2014 making this a combined OOB read+write primitive. This vulnerability is fixed in 3.0.18.0 and 3.1.13.0.",
    "published": "2026-05-14T19:00:20.014Z",
    "modified": "2026-05-14T19:49:59.966Z",
    "type": "cve",
    "title": "OpenImageIO: Signed integer overflow in SwapRGBABytes loop index leads to out-of-bounds read/write in DPX ABGR decoder",
    "source": "GitHub_M",
    "references": "https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-g267-j53j-5258",
    "id": "CVE-2026-43909",
    "bulletinFamily": "",
    "cwe": [
        "CWE-125",
        "CWE-190",
        "CWE-787"
    ],
    "cvelist": null,
    "sourceData": "AcademySoftwareFoundation OpenImageIO < 3.0.18.0\nAcademySoftwareFoundation OpenImageIO >= 3.1.4.0-beta, < 3.1.13.0",
    "sourceHref": "",
    "cvss": {
        "score": 8.8,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
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        "baseScore": 0,
        "baseSeverity": "",
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        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
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            "baseScore": 0,
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "OpenImageIO",
    "version": "< 3.0.18.0",
    "vendor": "AcademySoftwareFoundation",
    "ai_description": "Signed integer overflow in SwapRGBABytes loop index leads to out-of-bounds read/write in DPX ABGR decoder",
    "ai_severity": "High",
    "ai_vendor": "AcademySoftwareFoundation",
    "ai_product": "OpenImageIO",
    "ai_version": "< 3.0.18.0, < 3.1.13.0",
    "ai_score": 8.8
}