{
  "threat_severity" : "Important",
  "public_date" : "2009-10-22T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: fuse: prevent fuse_put_request on invalid pointer",
    "id" : "538734",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=538734"
  },
  "cvss" : {
    "cvss_base_score" : "4.6",
    "cvss_scoring_vector" : "AV:L/AC:L/Au:S/C:N/I:N/A:C",
    "status" : "verified"
  },
  "details" : [ "The fuse_direct_io function in fs/fuse/file.c in the fuse subsystem in the Linux kernel before 2.6.32-rc7 might allow attackers to cause a denial of service (invalid pointer dereference and OOPS) via vectors possibly related to a memory-consumption attack." ],
  "statement" : "Red Hat is aware of this issue and is tracking it via the following bug: https://bugzilla.redhat.com/CVE-2009-4021\nThe Linux kernel packages as shipped with Red Hat Enterprise Linux 3 and 4 do not include support for FUSE, and therefore are not affected by this issue.\nA future kernel update for Red Hat Enterprise MRG will address this flaw.",
  "affected_release" : [ {
    "product_name" : "MRG for RHEL-5",
    "release_date" : "2010-01-21T00:00:00Z",
    "advisory" : "RHSA-2010:0041",
    "cpe" : "cpe:/a:redhat:enterprise_mrg:1::el5",
    "package" : "kernel-rt-0:2.6.24.7-146.el5rt"
  }, {
    "product_name" : "Red Hat Enterprise Linux 5",
    "release_date" : "2010-01-19T00:00:00Z",
    "advisory" : "RHSA-2010:0046",
    "cpe" : "cpe:/o:redhat:enterprise_linux:5",
    "package" : "kernel-0:2.6.18-164.11.1.el5"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2009-4021\nhttps://nvd.nist.gov/vuln/detail/CVE-2009-4021" ],
  "name" : "CVE-2009-4021",
  "csaw" : false
}