{
  "threat_severity" : "Important",
  "public_date" : "2010-01-19T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: emergency route cache flushing leads to node deadlock",
    "id" : "545411",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=545411"
  },
  "cvss" : {
    "cvss_base_score" : "7.8",
    "cvss_scoring_vector" : "AV:N/AC:L/Au:N/C:N/I:N/A:C",
    "status" : "verified"
  },
  "cwe" : "CWE-662->CWE-362->CWE-672->CWE-476",
  "details" : [ "A certain Red Hat patch for net/ipv4/route.c in the Linux kernel 2.6.18 on Red Hat Enterprise Linux (RHEL) 5 allows remote attackers to cause a denial of service (deadlock) via crafted packets that force collisions in the IPv4 routing hash table, and trigger a routing \"emergency\" in which a hash chain is too long.  NOTE: this is related to an issue in the Linux kernel before 2.6.31, when the kernel routing cache is disabled, involving an uninitialized pointer and a panic." ],
  "statement" : "This issue did not affect the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 3, 4 and Red Hat Enterprise MRG. Shipped kernels do not include upstream commits c6153b5b and 1080d709 that introduced the problem.",
  "affected_release" : [ {
    "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"
  }, {
    "product_name" : "Red Hat Enterprise Virtualization for RHEL-5",
    "release_date" : "2010-02-09T00:00:00Z",
    "advisory" : "RHSA-2010:0095",
    "cpe" : "cpe:/o:redhat:enterprise_linux:5::hypervisor",
    "package" : "rhev-hypervisor-0:5.4-2.1.8.el5_4rhev2_1"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2009-4272\nhttps://nvd.nist.gov/vuln/detail/CVE-2009-4272" ],
  "name" : "CVE-2009-4272",
  "csaw" : false
}