{
    "id": "CVE-2016-6309",
    "published": "2016-09-26 19:59:06",
    "last_modified": "2026-06-17 00:50:48",
    "cvss_score": "9.8",
    "cvss_severity": "CRITICAL",
    "cvss_version": "3.0",
    "cvss_vector": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
    "cwe": "CWE-416",
    "description": "statem/statem.c in OpenSSL 1.1.0a does not consider memory-block movement after a realloc call, which allows remote attackers to cause a denial of service (use-after-free) or possibly execute arbitrary code via a crafted TLS session.",
    "epss_score": "0.70223",
    "epss_percentile": "0.99364",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-09-30 18:17:16",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "EPSS 70.2% — above the 10% action threshold."
    },
    "products": [
        {
            "vendor": "openssl",
            "product": "openssl"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759",
        "http://www-01.ibm.com/support/docview.wss?uid=swg21995039",
        "http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html",
        "http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html",
        "http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html",
        "http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html",
        "http://www.securityfocus.com/bid/93177",
        "http://www.securitytracker.com/id/1036885",
        "https://bto.bluecoat.com/security-advisory/sa132",
        "https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=acacbfa7565c78d2273c0b2a2e5e803f44afefeb",
        "https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03856en_us",
        "https://www.openssl.org/news/secadv/20160926.txt",
        "https://www.tenable.com/security/tns-2016-16",
        "https://www.tenable.com/security/tns-2016-20",
        "http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759",
        "http://www-01.ibm.com/support/docview.wss?uid=swg21995039",
        "http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html",
        "http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html",
        "http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html",
        "http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html",
        "http://www.securityfocus.com/bid/93177",
        "http://www.securitytracker.com/id/1036885",
        "https://bto.bluecoat.com/security-advisory/sa132",
        "https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=acacbfa7565c78d2273c0b2a2e5e803f44afefeb",
        "https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03856en_us"
    ]
}