{
    "id": "CVE-2009-2847",
    "published": "2009-08-18 21:00:00",
    "last_modified": "2026-06-16 23:10:20",
    "cvss_score": "4.9",
    "cvss_severity": "MEDIUM",
    "cvss_version": "2.0",
    "cvss_vector": "AV:L/AC:L/Au:N/C:C/I:N/A:N",
    "cwe": null,
    "description": "The do_sigaltstack function in kernel/signal.c in Linux kernel 2.4 through 2.4.37 and 2.6 before 2.6.31-rc5, when running on 64-bit systems, does not clear certain padding bytes from a structure, which allows local users to obtain sensitive information from the kernel stack via the sigaltstack function.",
    "epss_score": "0.00938",
    "epss_percentile": "0.59868",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 1,
    "updated_at": "2026-10-13 18:17:08",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "A public exploit exists."
    },
    "products": [
        {
            "vendor": "linux",
            "product": "kernel"
        },
        {
            "vendor": "linux",
            "product": "linux"
        },
        {
            "vendor": "linux",
            "product": "linux_kernel"
        }
    ],
    "kev_detail": null,
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "9352",
            "title": "Linux Kernel 2.6.31-rc5 - sigaltstack 4-Byte Stack Disclosure",
            "date": "2009-08-04",
            "url": "https://www.exploit-db.com/exploits/9352"
        }
    ],
    "refs_list": [
        "http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=0083fc2c50e6c5127c2802ad323adf8143ab7856",
        "http://rhn.redhat.com/errata/RHSA-2009-1243.html",
        "http://secunia.com/advisories/36136",
        "http://secunia.com/advisories/36501",
        "http://secunia.com/advisories/36562",
        "http://secunia.com/advisories/36759",
        "http://secunia.com/advisories/37105",
        "http://secunia.com/advisories/37471",
        "http://www.exploit-db.com/exploits/9352",
        "http://www.openwall.com/lists/oss-security/2009/08/04/1",
        "http://www.openwall.com/lists/oss-security/2009/08/05/1",
        "http://www.openwall.com/lists/oss-security/2009/08/26/2",
        "http://www.redhat.com/support/errata/RHSA-2009-1438.html",
        "http://www.securityfocus.com/archive/1/507985/100/0/threaded",
        "http://www.ubuntu.com/usn/USN-852-1",
        "http://www.vmware.com/security/advisories/VMSA-2009-0016.html",
        "http://www.vupen.com/english/advisories/2009/3316",
        "https://bugzilla.redhat.com/show_bug.cgi?id=515392",
        "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10637",
        "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8405",
        "https://www.redhat.com/archives/fedora-package-announce/2009-August/msg01256.html",
        "http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=0083fc2c50e6c5127c2802ad323adf8143ab7856",
        "http://rhn.redhat.com/errata/RHSA-2009-1243.html",
        "http://secunia.com/advisories/36136",
        "http://secunia.com/advisories/36501"
    ]
}