{
  "threat_severity" : "Important",
  "public_date" : "2015-12-09T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: local privesc in key management",
    "id" : "1284450",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=1284450"
  },
  "cvss" : {
    "cvss_base_score" : "7.2",
    "cvss_scoring_vector" : "AV:L/AC:L/Au:N/C:C/I:C/A:C",
    "status" : "verified"
  },
  "cvss3" : {
    "cvss3_base_score" : "7.8",
    "cvss3_scoring_vector" : "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-667",
  "details" : [ "The KEYS subsystem in the Linux kernel before 4.4 allows local users to gain privileges or cause a denial of service (BUG) via crafted keyctl commands that negatively instantiate a key, related to security/keys/encrypted-keys/encrypted.c, security/keys/trusted.c, and security/keys/user_defined.c.", "A flaw was found in the Linux kernel's key management system where it was possible for an attacker to escalate privileges or crash the machine. If a user key gets negatively instantiated, an error code is cached in the payload area. A negatively instantiated key may be then be positively instantiated by updating it with valid data. However, the ->update key type method must be aware that the error code may be there." ],
  "statement" : "This issue does not affect the Linux kernels as shipped with Red Hat Enterprise Linux 4 and 5.  This issue does affect the kernels shipped with Red Hat Enterprise Linux 6, 7, MRG-2 and realtime kernels and plans to be addressed in a future update.",
  "acknowledgement" : "Red Hat would like to thank Dmitry Vyukov (Google engineering) for reporting this issue.",
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 7",
    "release_date" : "2018-01-25T00:00:00Z",
    "advisory" : "RHSA-2018:0152",
    "cpe" : "cpe:/a:redhat:rhel_extras_rt:7",
    "package" : "kernel-rt-0:3.10.0-693.17.1.rt56.636.el7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "release_date" : "2018-01-25T00:00:00Z",
    "advisory" : "RHSA-2018:0151",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7",
    "package" : "kernel-0:3.10.0-693.17.1.el7"
  }, {
    "product_name" : "Red Hat Enterprise MRG 2",
    "release_date" : "2018-01-25T00:00:00Z",
    "advisory" : "RHSA-2018:0181",
    "cpe" : "cpe:/a:redhat:enterprise_mrg:2:server:el6",
    "package" : "kernel-rt-1:3.10.0-693.17.1.rt56.604.el6rt"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 4",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:4"
  }, {
    "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"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2015-8539\nhttps://nvd.nist.gov/vuln/detail/CVE-2015-8539\nhttps://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=096fe9eaea40a17e125569f9e657e34cdb6d73bd" ],
  "name" : "CVE-2015-8539",
  "csaw" : false
}