{
    "id": "CVE-2018-14600",
    "published": "2018-08-24 19:29:01",
    "last_modified": "2026-06-17 01:41:15",
    "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-787",
    "description": "An issue was discovered in libX11 through 1.6.5. The function XListExtensions in ListExt.c interprets a variable as signed instead of unsigned, resulting in an out-of-bounds write (of up to 128 bytes), leading to DoS or remote code execution.",
    "epss_score": "0.09341",
    "epss_percentile": "0.95251",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-05 18:17:17",
    "priority": {
        "rank": 3,
        "label": "In your normal cycle",
        "why": "Critical by CVSS (9.8), but no sign of active exploitation."
    },
    "products": [
        {
            "vendor": "canonical",
            "product": "ubuntu_linux"
        },
        {
            "vendor": "debian",
            "product": "debian_linux"
        },
        {
            "vendor": "x.org",
            "product": "libx11"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "http://www.openwall.com/lists/oss-security/2018/08/21/6",
        "http://www.securityfocus.com/bid/105177",
        "http://www.securitytracker.com/id/1041543",
        "https://access.redhat.com/errata/RHSA-2019:2079",
        "https://bugzilla.suse.com/show_bug.cgi?id=1102068",
        "https://cgit.freedesktop.org/xorg/lib/libX11/commit/?id=dbf72805fd9d7b1846fe9a11b46f3994bfc27fea",
        "https://lists.debian.org/debian-lts-announce/2018/08/msg00030.html",
        "https://lists.x.org/archives/xorg-announce/2018-August/002916.html",
        "https://security.gentoo.org/glsa/201811-01",
        "https://usn.ubuntu.com/3758-1/",
        "https://usn.ubuntu.com/3758-2/",
        "http://www.openwall.com/lists/oss-security/2018/08/21/6",
        "http://www.securityfocus.com/bid/105177",
        "http://www.securitytracker.com/id/1041543",
        "https://access.redhat.com/errata/RHSA-2019:2079",
        "https://bugzilla.suse.com/show_bug.cgi?id=1102068",
        "https://cgit.freedesktop.org/xorg/lib/libX11/commit/?id=dbf72805fd9d7b1846fe9a11b46f3994bfc27fea",
        "https://lists.debian.org/debian-lts-announce/2018/08/msg00030.html",
        "https://lists.x.org/archives/xorg-announce/2018-August/002916.html",
        "https://security.gentoo.org/glsa/201811-01",
        "https://usn.ubuntu.com/3758-1/",
        "https://usn.ubuntu.com/3758-2/"
    ]
}