{
    "id": "CVE-2021-28664",
    "published": "2021-05-10 15:15:07",
    "last_modified": "2026-06-17 03:46:43",
    "cvss_score": "8.8",
    "cvss_severity": "HIGH",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
    "cwe": "CWE-787",
    "description": "The Arm Mali GPU kernel driver allows privilege escalation or a denial of service (memory corruption) because an unprivileged user can achieve read/write access to read-only pages. This affects Bifrost r0p0 through r29p0 before r30p0, Valhall r19p0 through r29p0 before r30p0, and Midgard r8p0 through r30p0 before r31p0.",
    "epss_score": "0.05407",
    "epss_percentile": "0.92411",
    "kev": 1,
    "kev_due": "2021-11-17",
    "has_exploit": 0,
    "updated_at": "2026-09-27 18:17:29",
    "priority": {
        "rank": 1,
        "label": "Patch first",
        "why": "On CISA KEV — known exploited in the wild, due 2021-11-17."
    },
    "products": [
        {
            "vendor": "arm",
            "product": "bifrost_gpu_kernel_driver"
        },
        {
            "vendor": "arm",
            "product": "midgard_gpu_kernel_driver"
        },
        {
            "vendor": "arm",
            "product": "valhall_gpu_kernel_driver"
        }
    ],
    "kev_detail": {
        "cve_id": "CVE-2021-28664",
        "date_added": "2021-11-03",
        "due_date": "2021-11-17",
        "vendor": "Arm",
        "product": "Mali Graphics Processing Unit (GPU)",
        "name": "Arm Mali Graphics Processing Unit (GPU) Unspecified Vulnerability",
        "ransomware": 0
    },
    "exploits": [],
    "refs_list": [
        "https://developer.arm.com/Arm%20Security%20Center/Mali%20GPU%20Driver%20Vulnerabilities",
        "https://developer.arm.com/support/arm-security-updates",
        "https://developer.arm.com/support/arm-security-updates/mali-gpu-kernel-driver",
        "https://developer.arm.com/Arm%20Security%20Center/Mali%20GPU%20Driver%20Vulnerabilities",
        "https://developer.arm.com/support/arm-security-updates",
        "https://developer.arm.com/support/arm-security-updates/mali-gpu-kernel-driver",
        "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-28664"
    ]
}