{
  "threat_severity" : "Low",
  "public_date" : "2009-11-23T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: ext4: avoid divide by zero when trying to mount a corrupted file system",
    "id" : "547251",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=547251"
  },
  "cvss" : {
    "cvss_base_score" : "4.9",
    "cvss_scoring_vector" : "AV:L/AC:L/Au:N/C:N/I:N/A:C",
    "status" : "verified"
  },
  "details" : [ "The ext4_fill_flex_info function in fs/ext4/super.c in the Linux kernel before 2.6.32-git6 allows user-assisted remote attackers to cause a denial of service (divide-by-zero error and panic) via a malformed ext4 filesystem containing a super block with a large FLEX_BG group size (aka s_log_groups_per_flex value)." ],
  "statement" : "The Linux kernel packages as shipped with Red Hat Enterprise Linux 3, 4 and Red Hat Enterprise MRG do not include support for EXT4, and therefore are not affected by this issue.\nA future kernel update for Red Hat Enterprise Linux 5 will address this flaw.",
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 5",
    "release_date" : "2010-03-29T00:00:00Z",
    "advisory" : "RHSA-2010:0178",
    "cpe" : "cpe:/o:redhat:enterprise_linux:5",
    "package" : "kernel-0:2.6.18-194.el5"
  }, {
    "product_name" : "Red Hat Enterprise Linux 5.4.Z - Server Only",
    "release_date" : "2010-04-27T00:00:00Z",
    "advisory" : "RHSA-2010:0380",
    "cpe" : "cpe:/o:redhat:rhel_eus:5.4",
    "package" : "kernel-0:2.6.18-164.17.1.el5"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2009-4307\nhttps://nvd.nist.gov/vuln/detail/CVE-2009-4307" ],
  "name" : "CVE-2009-4307",
  "csaw" : false
}