GPU DDK – libusc OOB write at TreeRemove during WebGPU shader compilation_CVE-2026-21734

{
    "lastseen": "",
    "description": "A web page that contains unusual GPU shader code is loaded into the GPU compiler process and can trigger a write out-of-bounds write crash in the GPU shader compiler library. On certain platforms, when the compiler process has system privileges this could enable further exploits on the device.\n\n\n\nAn edge case using a very small value in GPU shader code can cause a segmentation fault in the GPU shader compiler due to am out-of-bounds write.",
    "published": "2026-06-26T15:14:00.365Z",
    "modified": "2026-06-26T19:13:09.026Z",
    "type": "cve",
    "title": "GPU DDK - libusc OOB write at TreeRemove during WebGPU shader compilation",
    "source": "imaginationtech",
    "references": "https://www.imaginationtech.com/gpu-driver-vulnerabilities/",
    "id": "CVE-2026-21734",
    "bulletinFamily": "",
    "cwe": [
        "CWE-823"
    ],
    "cvelist": null,
    "sourceData": "Imagination Technologies Graphics DDK 1.18 RTM\nImagination Technologies Graphics DDK 23.2 RTM\nImagination Technologies Graphics DDK 24.1 RTM\nImagination Technologies Graphics DDK 25.1 RTM",
    "sourceHref": "",
    "cvss": {
        "score": 7.7,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/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": "Graphics DDK",
    "version": "1.18 RTM",
    "vendor": "Imagination Technologies",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}