{
  "threat_severity" : "Moderate",
  "public_date" : "2007-07-15T00:00:00Z",
  "bugzilla" : {
    "description" : "NULL pointer dereference triggered by ptrace",
    "id" : "248324",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=248324"
  },
  "cwe" : "CWE-476",
  "details" : [ "The Linux kernel 2.6.20 and 2.6.21 does not properly handle an invalid LDT segment selector in %cs (the xcs field) during ptrace single-step operations, which allows local users to cause a denial of service (NULL dereference and OOPS) via certain code that makes ptrace PTRACE_SETREGS and PTRACE_SINGLESTEP requests, related to the TRACE_IRQS_ON function, and possibly related to the arch_ptrace function." ],
  "statement" : "This issue did not affect the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 2.1, 3, or 4.",
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 5",
    "release_date" : "2007-10-22T00:00:00Z",
    "advisory" : "RHSA-2007:0940",
    "cpe" : "cpe:/o:redhat:enterprise_linux:5",
    "package" : "kernel-0:2.6.18-8.1.15.el5"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2007-3731\nhttps://nvd.nist.gov/vuln/detail/CVE-2007-3731" ],
  "name" : "CVE-2007-3731",
  "csaw" : false
}