{
  "threat_severity" : "Important",
  "public_date" : "2016-04-28T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: bpf: refcnt overflow",
    "id" : "1334303",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=1334303"
  },
  "cvss" : {
    "cvss_base_score" : "7.2",
    "cvss_scoring_vector" : "AV:L/AC:L/Au:N/C:C/I:C/A:C",
    "status" : "draft"
  },
  "cwe" : "CWE-122",
  "details" : [ "The BPF subsystem in the Linux kernel before 4.5.5 mishandles reference counts, which allows local users to cause a denial of service (use-after-free) or possibly have unspecified other impact via a crafted application on (1) a system with more than 32 Gb of memory, related to the program reference count or (2) a 1 Tb system, related to the map reference count.", "A flaw was found in the Linux kernel's implementation of BPF in which systems can application can overflow a 32 bit refcount in both program and map refcount.  This refcount can wrap and end up a user after free." ],
  "statement" : "This issue does not affect the Linux kernels as shipped with Red Hat Enterprise Linux 4, 5, 6, 7 and Red Hat Enterprise MRG 2.",
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 5",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:5"
  }, {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise MRG 2",
    "fix_state" : "Not affected",
    "package_name" : "realtime-kernel",
    "cpe" : "cpe:/a:redhat:enterprise_mrg:2"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2016-4558\nhttps://nvd.nist.gov/vuln/detail/CVE-2016-4558" ],
  "name" : "CVE-2016-4558",
  "csaw" : false
}