{
    "id": "CVE-2017-18344",
    "published": "2018-07-26 19:29:00",
    "last_modified": "2026-06-17 01:12:39",
    "cvss_score": "5.5",
    "cvss_severity": "MEDIUM",
    "cvss_version": "3.0",
    "cvss_vector": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
    "cwe": "CWE-125",
    "description": "The timer_create syscall implementation in kernel/time/posix-timers.c in the Linux kernel before 4.14.8 doesn't properly validate the sigevent->sigev_notify field, which leads to out-of-bounds access in the show_timer function (called when /proc/$PID/timers is read). This allows userspace applications to read arbitrary kernel memory (on a kernel built with CONFIG_POSIX_TIMERS and CONFIG_CHECKPOINT_RESTORE).",
    "epss_score": "0.03443",
    "epss_percentile": "0.88615",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 1,
    "updated_at": "2026-10-03 18:17:18",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "A public exploit exists."
    },
    "products": [
        {
            "vendor": "canonical",
            "product": "ubuntu_linux"
        },
        {
            "vendor": "linux",
            "product": "linux_kernel"
        },
        {
            "vendor": "redhat",
            "product": "enterprise_linux_desktop"
        },
        {
            "vendor": "redhat",
            "product": "enterprise_linux_server"
        },
        {
            "vendor": "redhat",
            "product": "enterprise_linux_server_aus"
        },
        {
            "vendor": "redhat",
            "product": "enterprise_linux_server_eus"
        },
        {
            "vendor": "redhat",
            "product": "enterprise_linux_server_tus"
        },
        {
            "vendor": "redhat",
            "product": "enterprise_linux_workstation"
        },
        {
            "vendor": "redhat",
            "product": "mrg_realtime"
        }
    ],
    "kev_detail": null,
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "45175",
            "title": "Linux Kernel 4.14.7 (Ubuntu 16.04 / CentOS 7) - (KASLR & SMEP Bypass) Arbitrary File Read",
            "date": "2018-08-09",
            "url": "https://www.exploit-db.com/exploits/45175"
        }
    ],
    "refs_list": [
        "http://www.securityfocus.com/bid/104909",
        "http://www.securitytracker.com/id/1041414",
        "https://access.redhat.com/errata/RHSA-2018:2948",
        "https://access.redhat.com/errata/RHSA-2018:3083",
        "https://access.redhat.com/errata/RHSA-2018:3096",
        "https://access.redhat.com/errata/RHSA-2018:3459",
        "https://access.redhat.com/errata/RHSA-2018:3540",
        "https://access.redhat.com/errata/RHSA-2018:3586",
        "https://access.redhat.com/errata/RHSA-2018:3590",
        "https://access.redhat.com/errata/RHSA-2018:3591",
        "https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.8",
        "https://github.com/torvalds/linux/commit/cef31d9af908243421258f1df35a4a644604efbe",
        "https://usn.ubuntu.com/3742-1/",
        "https://usn.ubuntu.com/3742-2/",
        "https://www.exploit-db.com/exploits/45175/",
        "http://www.securityfocus.com/bid/104909",
        "http://www.securitytracker.com/id/1041414",
        "https://access.redhat.com/errata/RHSA-2018:2948",
        "https://access.redhat.com/errata/RHSA-2018:3083",
        "https://access.redhat.com/errata/RHSA-2018:3096",
        "https://access.redhat.com/errata/RHSA-2018:3459",
        "https://access.redhat.com/errata/RHSA-2018:3540",
        "https://access.redhat.com/errata/RHSA-2018:3586",
        "https://access.redhat.com/errata/RHSA-2018:3590",
        "https://access.redhat.com/errata/RHSA-2018:3591"
    ]
}