{
    "id": "CVE-2019-3859",
    "published": "2019-03-21 16:01:04",
    "last_modified": "2026-06-17 02:35:44",
    "cvss_score": "9.1",
    "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:N/A:H",
    "cwe": "CWE-125",
    "description": "An out of bounds read flaw was discovered in libssh2 before 1.8.1 in the _libssh2_packet_require and _libssh2_packet_requirev functions. A remote attacker who compromises a SSH server may be able to cause a Denial of Service or read data in the client memory.",
    "epss_score": "0.06275",
    "epss_percentile": "0.93390",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-06 18:17:21",
    "priority": {
        "rank": 3,
        "label": "In your normal cycle",
        "why": "Critical by CVSS (9.1), but no sign of active exploitation."
    },
    "products": [
        {
            "vendor": "debian",
            "product": "debian_linux"
        },
        {
            "vendor": "fedoraproject",
            "product": "fedora"
        },
        {
            "vendor": "libssh2",
            "product": "libssh2"
        },
        {
            "vendor": "netapp",
            "product": "ontap_select_deploy_administration_utility"
        },
        {
            "vendor": "opensuse",
            "product": "leap"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00040.html",
        "http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00003.html",
        "http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00102.html",
        "http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00103.html",
        "http://packetstormsecurity.com/files/152136/Slackware-Security-Advisory-libssh2-Updates.html",
        "http://www.openwall.com/lists/oss-security/2019/03/18/3",
        "http://www.securityfocus.com/bid/107485",
        "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3859",
        "https://lists.debian.org/debian-lts-announce/2019/03/msg00032.html",
        "https://lists.debian.org/debian-lts-announce/2019/04/msg00006.html",
        "https://lists.debian.org/debian-lts-announce/2019/07/msg00024.html",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5DK6VO2CEUTAJFYIKWNZKEKYMYR3NO2O/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XCWEA5ZCLKRDUK62QVVYMFWLWKOPX3LO/",
        "https://seclists.org/bugtraq/2019/Apr/25",
        "https://seclists.org/bugtraq/2019/Mar/25",
        "https://security.netapp.com/advisory/ntap-20190327-0005/",
        "https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2019-767",
        "https://www.debian.org/security/2019/dsa-4431",
        "https://www.libssh2.org/CVE-2019-3859.html",
        "https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html",
        "http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00040.html",
        "http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00003.html",
        "http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00102.html",
        "http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00103.html",
        "http://packetstormsecurity.com/files/152136/Slackware-Security-Advisory-libssh2-Updates.html"
    ]
}