{
  "threat_severity" : "Moderate",
  "public_date" : "2015-12-21T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: potential division by zero in TCP code",
    "id" : "1302219",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=1302219"
  },
  "cvss" : {
    "cvss_base_score" : "5.4",
    "cvss_scoring_vector" : "AV:N/AC:H/Au:N/C:N/I:N/A:C",
    "status" : "draft"
  },
  "cwe" : "CWE-369",
  "details" : [ "The tcp_cwnd_reduction function in net/ipv4/tcp_input.c in the Linux kernel before 4.3.5 allows remote attackers to cause a denial of service (divide-by-zero error and system crash) via crafted TCP traffic.", "A divide-by-zero vulnerability was found in a way the kernel processes TCP connections. The error can occur if a connection starts another cwnd reduction phase by setting tp->prior_cwnd to the current cwnd (0) in tcp_init_cwnd_reduction(). A remote, unauthenticated attacker could use this flaw to crash the kernel (denial of service)." ],
  "statement" : "This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5, 6, 7 and MRG-2 as the code with the flaw is not present in the products listed.",
  "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-2016-2070\nhttps://nvd.nist.gov/vuln/detail/CVE-2016-2070" ],
  "name" : "CVE-2016-2070",
  "csaw" : false
}