{
    "id": "CVE-2018-3639",
    "published": "2018-05-22 12:29:00",
    "last_modified": "2026-06-17 01:57:35",
    "cvss_score": "5.5",
    "cvss_severity": "MEDIUM",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
    "cwe": "CWE-203",
    "description": "Systems with microprocessors utilizing speculative execution and speculative execution of memory reads before the addresses of all prior memory writes are known may allow unauthorized disclosure of information to an attacker with local user access via a side-channel analysis, aka Speculative Store Bypass (SSB), Variant 4.",
    "epss_score": "0.60631",
    "epss_percentile": "0.99120",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 1,
    "updated_at": "2026-09-26 18:22:53",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "A public exploit exists."
    },
    "products": [
        {
            "vendor": "intel",
            "product": "atom_c"
        },
        {
            "vendor": "intel",
            "product": "atom_e"
        },
        {
            "vendor": "intel",
            "product": "atom_x5-e3930"
        },
        {
            "vendor": "intel",
            "product": "atom_x5-e3940"
        },
        {
            "vendor": "intel",
            "product": "atom_x7-e3950"
        },
        {
            "vendor": "intel",
            "product": "atom_z"
        },
        {
            "vendor": "intel",
            "product": "celeron_j"
        },
        {
            "vendor": "intel",
            "product": "celeron_n"
        },
        {
            "vendor": "intel",
            "product": "core_i3"
        },
        {
            "vendor": "intel",
            "product": "core_i5"
        },
        {
            "vendor": "intel",
            "product": "core_i7"
        },
        {
            "vendor": "intel",
            "product": "core_m"
        },
        {
            "vendor": "intel",
            "product": "pentium"
        },
        {
            "vendor": "intel",
            "product": "pentium_j"
        },
        {
            "vendor": "intel",
            "product": "pentium_silver"
        },
        {
            "vendor": "intel",
            "product": "xeon_e-1105c"
        },
        {
            "vendor": "intel",
            "product": "xeon_e3"
        },
        {
            "vendor": "intel",
            "product": "xeon_e3_1105c_v2"
        },
        {
            "vendor": "intel",
            "product": "xeon_e3_1125c_v2"
        },
        {
            "vendor": "intel",
            "product": "xeon_e3_1220_v2"
        },
        {
            "vendor": "intel",
            "product": "xeon_e3_1220_v3"
        },
        {
            "vendor": "intel",
            "product": "xeon_e3_1220_v5"
        },
        {
            "vendor": "intel",
            "product": "xeon_e3_1220_v6"
        },
        {
            "vendor": "intel",
            "product": "xeon_e3_12201"
        },
        {
            "vendor": "intel",
            "product": "xeon_e3_12201_v2"
        },
        {
            "vendor": "intel",
            "product": "xeon_e3_1220l_v3"
        },
        {
            "vendor": "intel",
            "product": "xeon_e3_1225"
        },
        {
            "vendor": "intel",
            "product": "xeon_e3_1225_v2"
        },
        {
            "vendor": "intel",
            "product": "xeon_e3_1225_v3"
        },
        {
            "vendor": "intel",
            "product": "xeon_e3_1225_v5"
        },
        {
            "vendor": "intel",
            "product": "xeon_e3_1225_v6"
        },
        {
            "vendor": "intel",
            "product": "xeon_e3_1226_v3"
        },
        {
            "vendor": "intel",
            "product": "xeon_e3_1230"
        },
        {
            "vendor": "intel",
            "product": "xeon_e3_1230_v2"
        },
        {
            "vendor": "intel",
            "product": "xeon_e3_1230_v3"
        },
        {
            "vendor": "intel",
            "product": "xeon_e3_1230_v5"
        },
        {
            "vendor": "intel",
            "product": "xeon_e3_1230_v6"
        },
        {
            "vendor": "intel",
            "product": "xeon_e3_1230l_v3"
        },
        {
            "vendor": "intel",
            "product": "xeon_e3_1231_v3"
        },
        {
            "vendor": "intel",
            "product": "xeon_e3_1235"
        }
    ],
    "kev_detail": null,
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "44695",
            "title": "AMD / ARM / Intel - Speculative Execution Variant 4 Speculative Store Bypass",
            "date": "2018-05-22",
            "url": "https://www.exploit-db.com/exploits/44695"
        }
    ],
    "refs_list": [
        "http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00058.html",
        "http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00059.html",
        "http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00007.html",
        "http://support.lenovo.com/us/en/solutions/LEN-22133",
        "http://www.fujitsu.com/global/support/products/software/security/products-f/cve-2018-3639e.html",
        "http://www.openwall.com/lists/oss-security/2020/06/10/1",
        "http://www.openwall.com/lists/oss-security/2020/06/10/2",
        "http://www.openwall.com/lists/oss-security/2020/06/10/5",
        "http://www.securityfocus.com/bid/104232",
        "http://www.securitytracker.com/id/1040949",
        "http://www.securitytracker.com/id/1042004",
        "http://xenbits.xen.org/xsa/advisory-263.html",
        "https://access.redhat.com/errata/RHSA-2018:1629",
        "https://access.redhat.com/errata/RHSA-2018:1630",
        "https://access.redhat.com/errata/RHSA-2018:1632",
        "https://access.redhat.com/errata/RHSA-2018:1633",
        "https://access.redhat.com/errata/RHSA-2018:1635",
        "https://access.redhat.com/errata/RHSA-2018:1636",
        "https://access.redhat.com/errata/RHSA-2018:1637",
        "https://access.redhat.com/errata/RHSA-2018:1638",
        "https://access.redhat.com/errata/RHSA-2018:1639",
        "https://access.redhat.com/errata/RHSA-2018:1640",
        "https://access.redhat.com/errata/RHSA-2018:1641",
        "https://access.redhat.com/errata/RHSA-2018:1642",
        "https://access.redhat.com/errata/RHSA-2018:1643"
    ]
}