{
  "threat_severity" : "Moderate",
  "public_date" : "2017-10-11T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: Use-after-free in snd_seq_ioctl_create_port()",
    "id" : "1501878",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=1501878"
  },
  "cvss3" : {
    "cvss3_base_score" : "5.5",
    "cvss3_scoring_vector" : "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-416",
  "details" : [ "Race condition in the ALSA subsystem in the Linux kernel before 4.13.8 allows local users to cause a denial of service (use-after-free) or possibly have unspecified other impact via crafted /dev/snd/seq ioctl calls, related to sound/core/seq/seq_clientmgr.c and sound/core/seq/seq_ports.c.", "A use-after-free vulnerability was found when issuing an ioctl to a sound device. This could allow a user to exploit a race condition and create memory corruption or possibly privilege escalation." ],
  "statement" : "This issue affects the Linux kernel packages as shipped with Red Hat\nEnterprise Linux 5,6, 7, realtime and MRG-2.\nRed Hat Enterprise Linux 5 has transitioned to Production phase 3.  \nDuring the Production 3 Phase, Critical impact Security Advisories (RHSAs) \nand selected Urgent Priority Bug Fix Advisories (RHBAs) may be released \nas they become available.\nThe official life cycle policy can be reviewed here:\nhttp://redhat.com/rhel/lifecycle\nFuture Linux kernel updates for the respective releases may address this issue.",
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 5.9 Long Life",
    "release_date" : "2018-12-13T00:00:00Z",
    "advisory" : "RHSA-2018:3823",
    "cpe" : "cpe:/o:redhat:rhel_aus:5.9",
    "package" : "kernel-0:2.6.18-348.42.1.el5"
  }, {
    "product_name" : "Red Hat Enterprise Linux 5 Extended Lifecycle Support",
    "release_date" : "2018-12-13T00:00:00Z",
    "advisory" : "RHSA-2018:3822",
    "cpe" : "cpe:/o:redhat:rhel_els:5",
    "package" : "kernel-0:2.6.18-436.el5"
  }, {
    "product_name" : "Red Hat Enterprise Linux 6",
    "release_date" : "2018-08-14T00:00:00Z",
    "advisory" : "RHSA-2018:2390",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6",
    "package" : "kernel-0:2.6.32-754.3.5.el6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "release_date" : "2018-04-10T00:00:00Z",
    "advisory" : "RHSA-2018:0676",
    "cpe" : "cpe:/a:redhat:rhel_extras_rt:7",
    "package" : "kernel-rt-0:3.10.0-862.rt56.804.el7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "release_date" : "2018-04-10T00:00:00Z",
    "advisory" : "RHSA-2018:1062",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7",
    "package" : "kernel-0:3.10.0-862.el7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7.4 Extended Update Support",
    "release_date" : "2018-04-17T00:00:00Z",
    "advisory" : "RHSA-2018:1130",
    "cpe" : "cpe:/o:redhat:rhel_eus:7.4",
    "package" : "kernel-0:3.10.0-693.25.2.el7"
  }, {
    "product_name" : "Red Hat Enterprise MRG 2",
    "release_date" : "2018-04-17T00:00:00Z",
    "advisory" : "RHSA-2018:1170",
    "cpe" : "cpe:/a:redhat:enterprise_mrg:2:server:el6",
    "package" : "kernel-rt-1:3.10.0-693.25.2.rt56.612.el6rt"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Affected",
    "package_name" : "kernel-alt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2017-15265\nhttps://nvd.nist.gov/vuln/detail/CVE-2017-15265" ],
  "name" : "CVE-2017-15265",
  "mitigation" : {
    "value" : "It is possible to prevent the affected code from being loaded by blacklisting the kernel module snd_seq.  Instructions relating to how to blacklist a kernel module are shown here: https://access.redhat.com/solutions/41278 \nAlternatively a custom permission set can be created by udev, the correct permissions will depend on your use case.  Please contact Red Hat customer support for creating a rule set that can minimize flaw exposure.",
    "lang" : "en:us"
  },
  "csaw" : false
}