{
  "threat_severity" : "Important",
  "public_date" : "2021-03-22T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: use-after-free in net/bluetooth/hci_event.c when destroying an hci_chan",
    "id" : "1961305",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=1961305"
  },
  "cvss3" : {
    "cvss3_base_score" : "7.8",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-416",
  "details" : [ "In the Linux kernel before 5.12.4, net/bluetooth/hci_event.c has a use-after-free when destroying an hci_chan, aka CID-5c4c8c954409. This leads to writing an arbitrary value.", "A use-after-free flaw was found in hci_send_acl in the bluetooth host controller interface (HCI) in Linux kernel, where a local attacker with an access rights could cause a denial of service problem on the system  The issue results from the object hchan, freed in hci_disconn_loglink_complete_evt, yet still used in other places. The highest threat from this vulnerability is to data integrity, confidentiality and system availability." ],
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 7",
    "release_date" : "2021-07-21T00:00:00Z",
    "advisory" : "RHSA-2021:2726",
    "cpe" : "cpe:/a:redhat:rhel_extras_rt:7",
    "package" : "kernel-rt-0:3.10.0-1160.36.2.rt56.1179.el7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "release_date" : "2021-07-21T00:00:00Z",
    "advisory" : "RHSA-2021:2725",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7",
    "package" : "kernel-0:3.10.0-1160.36.2.el7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "release_date" : "2021-07-20T00:00:00Z",
    "advisory" : "RHSA-2021:2727",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7",
    "package" : "kpatch-patch"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7.2 Advanced Update Support",
    "release_date" : "2021-07-20T00:00:00Z",
    "advisory" : "RHSA-2021:2734",
    "cpe" : "cpe:/o:redhat:rhel_aus:7.2",
    "package" : "kernel-0:3.10.0-327.98.2.el7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7.3 Advanced Update Support",
    "release_date" : "2021-07-20T00:00:00Z",
    "advisory" : "RHSA-2021:2733",
    "cpe" : "cpe:/o:redhat:rhel_aus:7.3",
    "package" : "kernel-0:3.10.0-514.90.2.el7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7.4 Advanced Update Support",
    "release_date" : "2021-07-20T00:00:00Z",
    "advisory" : "RHSA-2021:2732",
    "cpe" : "cpe:/o:redhat:rhel_aus:7.4",
    "package" : "kernel-0:3.10.0-693.90.2.el7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7.4 Telco Extended Update Support",
    "release_date" : "2021-07-20T00:00:00Z",
    "advisory" : "RHSA-2021:2732",
    "cpe" : "cpe:/o:redhat:rhel_tus:7.4",
    "package" : "kernel-0:3.10.0-693.90.2.el7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7.4 Update Services for SAP Solutions",
    "release_date" : "2021-07-20T00:00:00Z",
    "advisory" : "RHSA-2021:2732",
    "cpe" : "cpe:/o:redhat:rhel_e4s:7.4",
    "package" : "kernel-0:3.10.0-693.90.2.el7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7.6 Advanced Update Support(Disable again in 2026 - SPRHEL-7118)",
    "release_date" : "2021-07-20T00:00:00Z",
    "advisory" : "RHSA-2021:2730",
    "cpe" : "cpe:/o:redhat:rhel_aus:7.6",
    "package" : "kernel-0:3.10.0-957.78.2.el7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7.6 Telco Extended Update Support",
    "release_date" : "2021-07-20T00:00:00Z",
    "advisory" : "RHSA-2021:2730",
    "cpe" : "cpe:/o:redhat:rhel_tus:7.6",
    "package" : "kernel-0:3.10.0-957.78.2.el7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7.6 Update Services for SAP Solutions",
    "release_date" : "2021-07-20T00:00:00Z",
    "advisory" : "RHSA-2021:2730",
    "cpe" : "cpe:/o:redhat:rhel_e4s:7.6",
    "package" : "kernel-0:3.10.0-957.78.2.el7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7.6 Update Services for SAP Solutions",
    "release_date" : "2021-07-21T00:00:00Z",
    "advisory" : "RHSA-2021:2731",
    "cpe" : "cpe:/o:redhat:rhel_e4s:7.6",
    "package" : "kpatch-patch"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7.7 Extended Update Support",
    "release_date" : "2021-07-21T00:00:00Z",
    "advisory" : "RHSA-2021:2728",
    "cpe" : "cpe:/o:redhat:rhel_eus:7.7",
    "package" : "kernel-0:3.10.0-1062.52.2.el7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7.7 Extended Update Support",
    "release_date" : "2021-07-21T00:00:00Z",
    "advisory" : "RHSA-2021:2729",
    "cpe" : "cpe:/o:redhat:rhel_eus:7.7",
    "package" : "kpatch-patch"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2021-06-29T00:00:00Z",
    "advisory" : "RHSA-2021:2599",
    "cpe" : "cpe:/a:redhat:enterprise_linux:8::nfv",
    "package" : "kernel-rt-0:4.18.0-305.7.1.rt7.79.el8_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2021-06-29T00:00:00Z",
    "advisory" : "RHSA-2021:2563",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8",
    "package" : "kpatch-patch"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2021-06-29T00:00:00Z",
    "advisory" : "RHSA-2021:2570",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8",
    "package" : "kernel-0:4.18.0-305.7.1.el8_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.1 Extended Update Support",
    "release_date" : "2021-07-07T00:00:00Z",
    "advisory" : "RHSA-2021:2666",
    "cpe" : "cpe:/o:redhat:rhel_eus:8.1",
    "package" : "kernel-0:4.18.0-147.51.1.el8_1"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.1 Extended Update Support",
    "release_date" : "2021-07-07T00:00:00Z",
    "advisory" : "RHSA-2021:2668",
    "cpe" : "cpe:/o:redhat:rhel_eus:8.1",
    "package" : "kpatch-patch"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.2 Extended Update Support",
    "release_date" : "2021-07-20T00:00:00Z",
    "advisory" : "RHSA-2021:2719",
    "cpe" : "cpe:/a:redhat:rhel_eus:8.2::nfv",
    "package" : "kernel-rt-0:4.18.0-193.60.2.rt13.112.el8_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.2 Extended Update Support",
    "release_date" : "2021-07-20T00:00:00Z",
    "advisory" : "RHSA-2021:2718",
    "cpe" : "cpe:/o:redhat:rhel_eus:8.2",
    "package" : "kernel-0:4.18.0-193.60.2.el8_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.2 Extended Update Support",
    "release_date" : "2021-07-21T00:00:00Z",
    "advisory" : "RHSA-2021:2720",
    "cpe" : "cpe:/o:redhat:rhel_eus:8.2",
    "package" : "kpatch-patch"
  }, {
    "product_name" : "Red Hat Migration Toolkit for Containers 1.4",
    "release_date" : "2021-07-21T00:00:00Z",
    "advisory" : "RHBA-2021:2854",
    "cpe" : "cpe:/a:redhat:rhmt:1.4::el7",
    "package" : "rhmtc/openshift-migration-controller-rhel8:v1.4.6-4"
  }, {
    "product_name" : "Red Hat Migration Toolkit for Containers 1.4",
    "release_date" : "2021-07-21T00:00:00Z",
    "advisory" : "RHBA-2021:2854",
    "cpe" : "cpe:/a:redhat:rhmt:1.4::el7",
    "package" : "rhmtc/openshift-migration-log-reader-rhel8:v1.4.6-4"
  }, {
    "product_name" : "Red Hat Migration Toolkit for Containers 1.4",
    "release_date" : "2021-07-21T00:00:00Z",
    "advisory" : "RHBA-2021:2854",
    "cpe" : "cpe:/a:redhat:rhmt:1.4::el7",
    "package" : "rhmtc/openshift-migration-must-gather-rhel8:v1.4.6-4"
  }, {
    "product_name" : "Red Hat Migration Toolkit for Containers 1.4",
    "release_date" : "2021-07-21T00:00:00Z",
    "advisory" : "RHBA-2021:2854",
    "cpe" : "cpe:/a:redhat:rhmt:1.4::el7",
    "package" : "rhmtc/openshift-migration-operator-bundle:v1.4.6-5"
  }, {
    "product_name" : "Red Hat Migration Toolkit for Containers 1.4",
    "release_date" : "2021-07-21T00:00:00Z",
    "advisory" : "RHBA-2021:2854",
    "cpe" : "cpe:/a:redhat:rhmt:1.4::el7",
    "package" : "rhmtc/openshift-migration-registry-rhel8:v1.4.6-4"
  }, {
    "product_name" : "Red Hat Migration Toolkit for Containers 1.4",
    "release_date" : "2021-07-21T00:00:00Z",
    "advisory" : "RHBA-2021:2854",
    "cpe" : "cpe:/a:redhat:rhmt:1.4::el7",
    "package" : "rhmtc/openshift-migration-rsync-transfer-rhel8:v1.4.6-4"
  }, {
    "product_name" : "Red Hat Migration Toolkit for Containers 1.4",
    "release_date" : "2021-07-21T00:00:00Z",
    "advisory" : "RHBA-2021:2854",
    "cpe" : "cpe:/a:redhat:rhmt:1.4::el7",
    "package" : "rhmtc/openshift-migration-ui-rhel8:v1.4.6-4"
  }, {
    "product_name" : "Red Hat Migration Toolkit for Containers 1.4",
    "release_date" : "2021-07-21T00:00:00Z",
    "advisory" : "RHBA-2021:2854",
    "cpe" : "cpe:/a:redhat:rhmt:1.4::el7",
    "package" : "rhmtc/openshift-migration-velero-plugin-for-aws-rhel8:v1.4.6-4"
  }, {
    "product_name" : "Red Hat Migration Toolkit for Containers 1.4",
    "release_date" : "2021-07-21T00:00:00Z",
    "advisory" : "RHBA-2021:2854",
    "cpe" : "cpe:/a:redhat:rhmt:1.4::el7",
    "package" : "rhmtc/openshift-migration-velero-plugin-for-gcp-rhel8:v1.4.6-3"
  }, {
    "product_name" : "Red Hat Migration Toolkit for Containers 1.4",
    "release_date" : "2021-07-21T00:00:00Z",
    "advisory" : "RHBA-2021:2854",
    "cpe" : "cpe:/a:redhat:rhmt:1.4::el7",
    "package" : "rhmtc/openshift-migration-velero-plugin-for-microsoft-azure-rhel8:v1.4.6-4"
  }, {
    "product_name" : "Red Hat Migration Toolkit for Containers 1.4",
    "release_date" : "2021-07-21T00:00:00Z",
    "advisory" : "RHBA-2021:2854",
    "cpe" : "cpe:/a:redhat:rhmt:1.4::el7",
    "package" : "rhmtc/openshift-migration-velero-restic-restore-helper-rhel8:v1.4.6-5"
  }, {
    "product_name" : "Red Hat Migration Toolkit for Containers 1.4",
    "release_date" : "2021-07-21T00:00:00Z",
    "advisory" : "RHBA-2021:2854",
    "cpe" : "cpe:/a:redhat:rhmt:1.4::el7",
    "package" : "rhmtc/openshift-migration-velero-rhel8:v1.4.6-5"
  }, {
    "product_name" : "Red Hat Migration Toolkit for Containers 1.4",
    "release_date" : "2021-07-21T00:00:00Z",
    "advisory" : "RHBA-2021:2854",
    "cpe" : "cpe:/a:redhat:rhmt:1.4::el7",
    "package" : "rhmtc/openshift-velero-plugin-rhel8:v1.4.6-4"
  }, {
    "product_name" : "Red Hat Virtualization 4 for Red Hat Enterprise Linux 7",
    "release_date" : "2021-07-21T00:00:00Z",
    "advisory" : "RHSA-2021:2737",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7::hypervisor",
    "package" : "redhat-virtualization-host-0:4.3.17-20210713.0.el7_9",
    "impact" : "moderate"
  }, {
    "product_name" : "Red Hat Virtualization 4 for Red Hat Enterprise Linux 8",
    "release_date" : "2021-07-22T00:00:00Z",
    "advisory" : "RHSA-2021:2736",
    "cpe" : "cpe:/o:redhat:rhev_hypervisor:4.4::el8",
    "package" : "redhat-virtualization-host-0:4.4.7-20210715.1.el8_4",
    "impact" : "moderate"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 5",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:5",
    "impact" : "moderate"
  }, {
    "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 9",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2021-33034\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-33034\nhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5c4c8c9544099bb9043a10a5318130a943e32fc3\nhttps://sites.google.com/view/syzscope/kasan-use-after-free-read-in-hci_send_acl\nhttps://syzkaller.appspot.com/bug?id=2e1943a94647f7732dd6fc60368642d6e8dc91b1" ],
  "name" : "CVE-2021-33034",
  "mitigation" : {
    "value" : "Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.",
    "lang" : "en:us"
  },
  "csaw" : false
}