{
    "id": "CVE-2021-3520",
    "published": "2021-06-02 13:15:13",
    "last_modified": "2026-10-08 21:17:40",
    "cvss_score": "9.8",
    "cvss_severity": "CRITICAL",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
    "cwe": "CWE-190",
    "description": "There's a flaw in lz4. An attacker who submits a crafted file to an application linked with lz4 may be able to trigger an integer overflow, leading to calling of memmove() on a negative size argument, causing an out-of-bounds write and/or a crash. The greatest impact of this flaw is to availability, with some potential impact to confidentiality and integrity as well.",
    "epss_score": "0.03216",
    "epss_percentile": "0.87859",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-10 18:17:26",
    "priority": {
        "rank": 3,
        "label": "In your normal cycle",
        "why": "Critical by CVSS (9.8), but no sign of active exploitation."
    },
    "products": [
        {
            "vendor": "lz4_project",
            "product": "lz4"
        },
        {
            "vendor": "netapp",
            "product": "active_iq_unified_manager"
        },
        {
            "vendor": "netapp",
            "product": "cloud_backup"
        },
        {
            "vendor": "netapp",
            "product": "ontap_select_deploy_administration_utility"
        },
        {
            "vendor": "oracle",
            "product": "communications_cloud_native_core_policy"
        },
        {
            "vendor": "oracle",
            "product": "zfs_storage_appliance_kit"
        },
        {
            "vendor": "splunk",
            "product": "universal_forwarder"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "https://bugzilla.redhat.com/show_bug.cgi?id=1954559",
        "https://security.netapp.com/advisory/ntap-20211104-0005/",
        "https://www.oracle.com//security-alerts/cpujul2021.html",
        "https://www.oracle.com/security-alerts/cpuapr2022.html",
        "https://www.oracle.com/security-alerts/cpuoct2021.html",
        "https://bugzilla.redhat.com/show_bug.cgi?id=1954559",
        "https://security.netapp.com/advisory/ntap-20211104-0005/",
        "https://www.oracle.com//security-alerts/cpujul2021.html",
        "https://www.oracle.com/security-alerts/cpuapr2022.html",
        "https://www.oracle.com/security-alerts/cpuoct2021.html"
    ]
}