{
  "threat_severity" : "Moderate",
  "public_date" : "2012-01-25T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: jbd2: unmapped buffer with _Unwritten or _Delay flags set can lead to DoS",
    "id" : "749143",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=749143"
  },
  "cvss" : {
    "cvss_base_score" : "4.9",
    "cvss_scoring_vector" : "AV:L/AC:L/Au:N/C:N/I:N/A:C",
    "status" : "verified"
  },
  "details" : [ "The journal_unmap_buffer function in fs/jbd2/transaction.c in the Linux kernel before 3.3.1 does not properly handle the _Delay and _Unwritten buffer head states, which allows local users to cause a denial of service (system crash) by leveraging the presence of an ext4 filesystem that was mounted with a journal." ],
  "statement" : "This has been addressed in Red Hat Enterprise Linux 5, 6, and Red Hat Enterprise MRG via https://rhn.redhat.com/errata/RHSA-2012-0107.html, https://rhn.redhat.com/errata/RHSA-2012-0571.html, and https://rhn.redhat.com/errata/RHSA-2012-0670.html. Red Hat Enterprise Linux 4 is now in Production 3 of the maintenance life-cycle, https://access.redhat.com/support/policy/updates/errata/, therefore the fix for this issue is not currently planned to be included in the future updates.",
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 5",
    "release_date" : "2012-02-09T00:00:00Z",
    "advisory" : "RHSA-2012:0107",
    "cpe" : "cpe:/o:redhat:enterprise_linux:5",
    "package" : "kernel-0:2.6.18-274.18.1.el5"
  }, {
    "product_name" : "Red Hat Enterprise Linux 6",
    "release_date" : "2012-05-15T00:00:00Z",
    "advisory" : "RHSA-2012:0571",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6",
    "package" : "kernel-0:2.6.32-220.17.1.el6"
  }, {
    "product_name" : "Red Hat Enterprise MRG 2",
    "release_date" : "2012-05-15T00:00:00Z",
    "advisory" : "RHSA-2012:0670",
    "cpe" : "cpe:/a:redhat:enterprise_mrg:2:server:el6",
    "package" : "kernel-rt-0:3.0.30-rt50.62.el6rt"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2011-4086\nhttps://nvd.nist.gov/vuln/detail/CVE-2011-4086" ],
  "name" : "CVE-2011-4086",
  "csaw" : false
}