{
    "id": "CVE-2011-2189",
    "published": "2011-10-10 10:55:05",
    "last_modified": "2026-06-16 23:30:53",
    "cvss_score": "7.5",
    "cvss_severity": "HIGH",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
    "cwe": "CWE-400",
    "description": "net/core/net_namespace.c in the Linux kernel 2.6.32 and earlier does not properly handle a high rate of creation and cleanup of network namespaces, which makes it easier for remote attackers to cause a denial of service (memory consumption) via requests to a daemon that requires a separate namespace per connection, as demonstrated by vsftpd.",
    "epss_score": "0.17854",
    "epss_percentile": "0.97085",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 1,
    "updated_at": "2026-09-30 18:17:09",
    "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": "redhat",
            "product": "enterprise_linux"
        },
        {
            "vendor": "redhat",
            "product": "enterprise_mrg"
        }
    ],
    "kev_detail": null,
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "36425",
            "title": "Linux Kernel 2.6.35 - Network Namespace Remote Denial of Service",
            "date": "2011-12-06",
            "url": "https://www.exploit-db.com/exploits/36425"
        }
    ],
    "refs_list": [
        "http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=629373",
        "http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=2b035b39970740722598f7a9d548835f9bdd730f",
        "http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=f875bae065334907796da12523f9df85c89f5712",
        "http://ie.archive.ubuntu.com/linux/kernel/v2.6/ChangeLog-2.6.33",
        "http://kerneltrap.org/mailarchive/git-commits-head/2009/12/8/15289",
        "http://neil.brown.name/git?p=linux-2.6%3Ba=patch%3Bh=2b035b39970740722598f7a9d548835f9bdd730f",
        "http://patchwork.ozlabs.org/patch/88217/",
        "http://www.debian.org/security/2011/dsa-2305",
        "http://www.openwall.com/lists/oss-security/2011/06/06/10",
        "http://www.openwall.com/lists/oss-security/2011/06/06/20",
        "http://www.ubuntu.com/usn/USN-1288-1",
        "https://bugs.launchpad.net/ubuntu/+source/linux/+bug/720095",
        "https://bugzilla.redhat.com/show_bug.cgi?id=711134",
        "https://bugzilla.redhat.com/show_bug.cgi?id=711245",
        "http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=629373",
        "http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=2b035b39970740722598f7a9d548835f9bdd730f",
        "http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=f875bae065334907796da12523f9df85c89f5712",
        "http://ie.archive.ubuntu.com/linux/kernel/v2.6/ChangeLog-2.6.33",
        "http://kerneltrap.org/mailarchive/git-commits-head/2009/12/8/15289",
        "http://neil.brown.name/git?p=linux-2.6%3Ba=patch%3Bh=2b035b39970740722598f7a9d548835f9bdd730f",
        "http://patchwork.ozlabs.org/patch/88217/",
        "http://www.debian.org/security/2011/dsa-2305",
        "http://www.openwall.com/lists/oss-security/2011/06/06/10",
        "http://www.openwall.com/lists/oss-security/2011/06/06/20",
        "http://www.ubuntu.com/usn/USN-1288-1"
    ]
}