{
    "id": "CVE-2016-6663",
    "published": "2016-12-13 21:59:00",
    "last_modified": "2026-06-17 00:51:33",
    "cvss_score": "7.0",
    "cvss_severity": "HIGH",
    "cvss_version": "3.0",
    "cvss_vector": "CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
    "cwe": "CWE-362",
    "description": "Race condition in Oracle MySQL before 5.5.52, 5.6.x before 5.6.33, 5.7.x before 5.7.15, and 8.x before 8.0.1; MariaDB before 5.5.52, 10.0.x before 10.0.28, and 10.1.x before 10.1.18; Percona Server before 5.5.51-38.2, 5.6.x before 5.6.32-78-1, and 5.7.x before 5.7.14-8; and Percona XtraDB Cluster before 5.5.41-37.0, 5.6.x before 5.6.32-25.17, and 5.7.x before 5.7.14-26.17 allows local users with certain permissions to gain privileges by leveraging use of my_copystat by REPAIR TABLE to repair a MyISAM table.",
    "epss_score": "0.04313",
    "epss_percentile": "0.90883",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 1,
    "updated_at": "2026-10-06 18:17:14",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "A public exploit exists."
    },
    "products": [
        {
            "vendor": "mariadb",
            "product": "mariadb"
        },
        {
            "vendor": "oracle",
            "product": "mysql"
        },
        {
            "vendor": "percona",
            "product": "percona_server"
        },
        {
            "vendor": "percona",
            "product": "xtradb_cluster"
        }
    ],
    "kev_detail": null,
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "40678",
            "title": "MySQL / MariaDB / PerconaDB 5.5.x/5.6.x/5.7.x - 'mysql' System User Privilege Escalation / Race Condition",
            "date": "2016-11-01",
            "url": "https://www.exploit-db.com/exploits/40678"
        }
    ],
    "refs_list": [
        "http://rhn.redhat.com/errata/RHSA-2016-2130.html",
        "http://rhn.redhat.com/errata/RHSA-2016-2131.html",
        "http://rhn.redhat.com/errata/RHSA-2016-2595.html",
        "http://rhn.redhat.com/errata/RHSA-2016-2749.html",
        "http://rhn.redhat.com/errata/RHSA-2016-2927.html",
        "http://rhn.redhat.com/errata/RHSA-2016-2928.html",
        "http://rhn.redhat.com/errata/RHSA-2017-0184.html",
        "http://seclists.org/fulldisclosure/2016/Nov/4",
        "http://www.openwall.com/lists/oss-security/2016/10/25/4",
        "http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html",
        "http://www.securityfocus.com/bid/92911",
        "http://www.securityfocus.com/bid/93614",
        "https://dev.mysql.com/doc/relnotes/mysql/5.5/en/news-5-5-52.html",
        "https://dev.mysql.com/doc/relnotes/mysql/5.6/en/news-5-6-33.html",
        "https://dev.mysql.com/doc/relnotes/mysql/5.7/en/news-5-7-15.html",
        "https://dev.mysql.com/doc/relnotes/mysql/8.0/en/news-8-0-1.html",
        "https://github.com/MariaDB/server/commit/347eeefbfc658c8531878218487d729f4e020805",
        "https://github.com/mysql/mysql-server/commit/4e5473862e6852b0f3802b0cd0c6fa10b5253291",
        "https://legalhackers.com/advisories/MySQL-Maria-Percona-PrivEscRace-CVE-2016-6663-5616-Exploit.html",
        "https://mariadb.com/kb/en/mariadb/mariadb-10028-release-notes/",
        "https://mariadb.com/kb/en/mariadb/mariadb-10118-release-notes/",
        "https://mariadb.com/kb/en/mariadb/mariadb-5552-release-notes/",
        "https://www.exploit-db.com/exploits/40678/",
        "https://www.percona.com/blog/2016/11/02/percona-responds-to-cve-2016-6663-and-cve-2016-6664/",
        "http://rhn.redhat.com/errata/RHSA-2016-2130.html"
    ]
}