{
    "id": "CVE-2019-9213",
    "published": "2019-03-05 22:29:00",
    "last_modified": "2026-06-17 02:43:22",
    "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:N/I:N/A:H",
    "cwe": "CWE-476",
    "description": "In the Linux kernel before 4.20.14, expand_downwards in mm/mmap.c lacks a check for the mmap minimum address, which makes it easier for attackers to exploit kernel NULL pointer dereferences on non-SMAP platforms. This is related to a capability check for the wrong task.",
    "epss_score": "0.05667",
    "epss_percentile": "0.92747",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 1,
    "updated_at": "2026-10-02 18:17:25",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "A public exploit exists."
    },
    "products": [
        {
            "vendor": "canonical",
            "product": "ubuntu_linux"
        },
        {
            "vendor": "debian",
            "product": "debian_linux"
        },
        {
            "vendor": "linux",
            "product": "linux_kernel"
        },
        {
            "vendor": "opensuse",
            "product": "leap"
        },
        {
            "vendor": "redhat",
            "product": "enterprise_linux"
        }
    ],
    "kev_detail": null,
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "47957",
            "title": "Reliable Datagram Sockets (RDS) - rds_atomic_free_op NULL pointer dereference Privilege Escalation (Metasploit)",
            "date": "2020-01-23",
            "url": "https://www.exploit-db.com/exploits/47957"
        },
        {
            "source": "exploit-db",
            "ref_id": "46502",
            "title": "Linux < 4.20.14 - Virtual Address 0 is Mappable via Privileged write() to /proc/*/mem",
            "date": "2019-03-06",
            "url": "https://www.exploit-db.com/exploits/46502"
        }
    ],
    "refs_list": [
        "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0a1d52994d440e21def1c2174932410b4f2a98a1",
        "http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00045.html",
        "http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00052.html",
        "http://packetstormsecurity.com/files/156053/Reliable-Datagram-Sockets-RDS-rds_atomic_free_op-Privilege-Escalation.html",
        "http://www.securityfocus.com/bid/107296",
        "https://access.redhat.com/errata/RHSA-2019:0831",
        "https://access.redhat.com/errata/RHSA-2019:1479",
        "https://access.redhat.com/errata/RHSA-2019:1480",
        "https://bugs.chromium.org/p/project-zero/issues/detail?id=1792",
        "https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.105",
        "https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.27",
        "https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.14",
        "https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.162",
        "https://github.com/torvalds/linux/commit/0a1d52994d440e21def1c2174932410b4f2a98a1",
        "https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html",
        "https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html",
        "https://lists.debian.org/debian-lts-announce/2019/05/msg00002.html",
        "https://usn.ubuntu.com/3930-1/",
        "https://usn.ubuntu.com/3930-2/",
        "https://usn.ubuntu.com/3931-1/",
        "https://usn.ubuntu.com/3931-2/",
        "https://usn.ubuntu.com/3932-1/",
        "https://usn.ubuntu.com/3932-2/",
        "https://usn.ubuntu.com/3933-1/",
        "https://usn.ubuntu.com/3933-2/"
    ]
}