{
    "id": "CVE-2018-20784",
    "published": "2019-02-22 15:29:00",
    "last_modified": "2026-06-17 01:53:28",
    "cvss_score": "9.8",
    "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:H/A:H",
    "cwe": "CWE-835",
    "description": "In the Linux kernel before 4.20.2, kernel/sched/fair.c mishandles leaf cfs_rq's, which allows attackers to cause a denial of service (infinite loop in update_blocked_averages) or possibly have unspecified other impact by inducing a high load.",
    "epss_score": "0.04173",
    "epss_percentile": "0.90641",
    "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": "linux",
            "product": "linux_kernel"
        },
        {
            "vendor": "redhat",
            "product": "enterprise_linux"
        },
        {
            "vendor": "redhat",
            "product": "enterprise_linux_for_real_time"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c40f7d74c741a907cfaeb73a7697081881c497d0",
        "https://access.redhat.com/errata/RHSA-2019:1959",
        "https://access.redhat.com/errata/RHSA-2019:1971",
        "https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.2",
        "https://github.com/torvalds/linux/commit/c40f7d74c741a907cfaeb73a7697081881c497d0",
        "https://usn.ubuntu.com/4115-1/",
        "https://usn.ubuntu.com/4118-1/",
        "https://usn.ubuntu.com/4211-1/",
        "https://usn.ubuntu.com/4211-2/",
        "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c40f7d74c741a907cfaeb73a7697081881c497d0",
        "https://access.redhat.com/errata/RHSA-2019:1959",
        "https://access.redhat.com/errata/RHSA-2019:1971",
        "https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.2",
        "https://github.com/torvalds/linux/commit/c40f7d74c741a907cfaeb73a7697081881c497d0",
        "https://usn.ubuntu.com/4115-1/",
        "https://usn.ubuntu.com/4118-1/",
        "https://usn.ubuntu.com/4211-1/",
        "https://usn.ubuntu.com/4211-2/"
    ]
}