{
    "id": "CVE-2018-18751",
    "published": "2018-10-29 12:29:09",
    "last_modified": "2026-06-17 01:47:49",
    "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-415",
    "description": "An issue was discovered in GNU gettext 0.19.8. There is a double free in default_add_message in read-catalog.c, related to an invalid free in po_gram_parse in po-gram-gen.y, as demonstrated by lt-msgfmt.",
    "epss_score": "0.04257",
    "epss_percentile": "0.90808",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-08 18:17:20",
    "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": "gnu",
            "product": "gettext"
        },
        {
            "vendor": "redhat",
            "product": "enterprise_linux"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00061.html",
        "http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00065.html",
        "http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00025.html",
        "https://access.redhat.com/errata/RHSA-2019:3643",
        "https://github.com/CCCCCrash/POCs/tree/master/Bin/Tools-gettext-0.19.8.1/doublefree",
        "https://github.com/CCCCCrash/POCs/tree/master/Bin/Tools-gettext-0.19.8.1/heapcorruption",
        "https://usn.ubuntu.com/3815-1/",
        "https://usn.ubuntu.com/3815-2/",
        "http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00061.html",
        "http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00065.html",
        "http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00025.html",
        "https://access.redhat.com/errata/RHSA-2019:3643",
        "https://github.com/CCCCCrash/POCs/tree/master/Bin/Tools-gettext-0.19.8.1/doublefree",
        "https://github.com/CCCCCrash/POCs/tree/master/Bin/Tools-gettext-0.19.8.1/heapcorruption",
        "https://usn.ubuntu.com/3815-1/",
        "https://usn.ubuntu.com/3815-2/"
    ]
}