{
  "threat_severity" : "Important",
  "public_date" : "2023-02-23T06:30:00Z",
  "bugzilla" : {
    "description" : "kernel: tcindex: use-after-free vulnerability in traffic control index filter allows privilege escalation",
    "id" : "2181847",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2181847"
  },
  "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" : [ "Use After Free vulnerability in Linux kernel traffic control index filter (tcindex) allows Privilege Escalation. The imperfect hash area can be updated while packets are traversing, which will cause a use-after-free when 'tcf_exts_exec()' is called with the destroyed tcf_ext. A local attacker user can use this vulnerability to elevate its privileges to root.\nThis issue affects Linux Kernel: from 4.14 before git commit ee059170b1f7e94e55fa6cadee544e176a6e59c2.", "A use-after-free vulnerability was found in the traffic control index filter (tcindex) in the Linux kernel. The imperfect hash area can be updated while packets are traversing. This issue could allow a local attacker to cause a use-after-free problem, leading to privilege escalation." ],
  "statement" : "For the Red Hat Enterprise Linux 7, please use mitigation to disable module cls_tcindex, because some other bugs exists in the Linux Kernel traffic control index filter too that not going to be fixed before Red Hat Enterprise Linux 8.",
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2023-08-08T00:00:00Z",
    "advisory" : "RHSA-2023:4541",
    "cpe" : "cpe:/a:redhat:enterprise_linux:8::nfv",
    "package" : "kernel-rt-0:4.18.0-477.21.1.rt7.284.el8_8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2023-08-08T00:00:00Z",
    "advisory" : "RHSA-2023:4517",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8",
    "package" : "kernel-0:4.18.0-477.21.1.el8_8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2023-08-08T00:00:00Z",
    "advisory" : "RHSA-2023:4531",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8",
    "package" : "kpatch-patch"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions",
    "release_date" : "2023-06-27T00:00:00Z",
    "advisory" : "RHSA-2023:3852",
    "cpe" : "cpe:/o:redhat:rhel_e4s:8.1",
    "package" : "kernel-0:4.18.0-147.85.1.el8_1"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions",
    "release_date" : "2023-06-27T00:00:00Z",
    "advisory" : "RHSA-2023:3853",
    "cpe" : "cpe:/o:redhat:rhel_e4s:8.1",
    "package" : "kpatch-patch"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.2 Advanced Update Support",
    "release_date" : "2023-07-18T00:00:00Z",
    "advisory" : "RHSA-2023:4125",
    "cpe" : "cpe:/o:redhat:rhel_aus:8.2",
    "package" : "kernel-0:4.18.0-193.109.1.el8_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.2 Telecommunications Update Service",
    "release_date" : "2023-07-18T00:00:00Z",
    "advisory" : "RHSA-2023:4126",
    "cpe" : "cpe:/a:redhat:rhel_tus:8.2::nfv",
    "package" : "kernel-rt-0:4.18.0-193.109.1.rt13.160.el8_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.2 Telecommunications Update Service",
    "release_date" : "2023-07-18T00:00:00Z",
    "advisory" : "RHSA-2023:4125",
    "cpe" : "cpe:/o:redhat:rhel_tus:8.2",
    "package" : "kernel-0:4.18.0-193.109.1.el8_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions",
    "release_date" : "2023-07-18T00:00:00Z",
    "advisory" : "RHSA-2023:4125",
    "cpe" : "cpe:/o:redhat:rhel_e4s:8.2",
    "package" : "kernel-0:4.18.0-193.109.1.el8_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions",
    "release_date" : "2023-07-18T00:00:00Z",
    "advisory" : "RHSA-2023:4146",
    "cpe" : "cpe:/o:redhat:rhel_e4s:8.2",
    "package" : "kpatch-patch"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support",
    "release_date" : "2023-07-25T00:00:00Z",
    "advisory" : "RHSA-2023:4256",
    "cpe" : "cpe:/o:redhat:rhel_aus:8.4",
    "package" : "kernel-0:4.18.0-305.97.1.el8_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.4 Telecommunications Update Service",
    "release_date" : "2023-07-25T00:00:00Z",
    "advisory" : "RHSA-2023:4255",
    "cpe" : "cpe:/a:redhat:rhel_tus:8.4::nfv",
    "package" : "kernel-rt-0:4.18.0-305.97.1.rt7.172.el8_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.4 Telecommunications Update Service",
    "release_date" : "2023-07-25T00:00:00Z",
    "advisory" : "RHSA-2023:4256",
    "cpe" : "cpe:/o:redhat:rhel_tus:8.4",
    "package" : "kernel-0:4.18.0-305.97.1.el8_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions",
    "release_date" : "2023-07-25T00:00:00Z",
    "advisory" : "RHSA-2023:4256",
    "cpe" : "cpe:/o:redhat:rhel_e4s:8.4",
    "package" : "kernel-0:4.18.0-305.97.1.el8_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions",
    "release_date" : "2023-07-25T00:00:00Z",
    "advisory" : "RHSA-2023:4262",
    "cpe" : "cpe:/o:redhat:rhel_e4s:8.4",
    "package" : "kpatch-patch"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.6 Extended Update Support",
    "release_date" : "2023-07-18T00:00:00Z",
    "advisory" : "RHSA-2023:4130",
    "cpe" : "cpe:/o:redhat:rhel_eus:8.6",
    "package" : "kernel-0:4.18.0-372.64.1.el8_6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.6 Extended Update Support",
    "release_date" : "2023-07-18T00:00:00Z",
    "advisory" : "RHSA-2023:4145",
    "cpe" : "cpe:/o:redhat:rhel_eus:8.6",
    "package" : "kpatch-patch"
  }, {
    "product_name" : "Red Hat Virtualization 4 for Red Hat Enterprise Linux 8",
    "release_date" : "2023-07-18T00:00:00Z",
    "advisory" : "RHSA-2023:4130",
    "cpe" : "cpe:/o:redhat:rhev_hypervisor:4.4::el8",
    "package" : "kernel-0:4.18.0-372.64.1.el8_6"
  } ],
  "package_state" : [ {
    "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 7",
    "fix_state" : "Will not fix",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Will not fix",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2023-1281\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-1281\nhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ee059170b1f7e94e55fa6cadee544e176a6e59c2" ],
  "name" : "CVE-2023-1281",
  "mitigation" : {
    "value" : "This flaw can be mitigated by preventing the affected traffic control index filter (cls_tcindex) kernel module from loading during the boot time, ensure the module is added into the blacklist file.\n~~~\nRefer:  \nHow do I blacklist a kernel module to prevent it from loading automatically? \nhttps://access.redhat.com/solutions/41278\n~~~",
    "lang" : "en:us"
  },
  "csaw" : false
}