{
  "threat_severity" : "Important",
  "public_date" : "2021-12-14T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: local privilege escalation by exploiting the fsconfig syscall parameter leads to container breakout",
    "id" : "2034514",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2034514"
  },
  "cvss3" : {
    "cvss3_base_score" : "8.8",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-416",
  "details" : [ "A use-after-free flaw was found in cgroup1_parse_param in kernel/cgroup/cgroup-v1.c in the Linux kernel's cgroup v1 parser. A local attacker with a user privilege could cause a privilege escalation by exploiting the fsconfig syscall parameter leading to a container breakout and a denial of service on the system.", "A use-after-free flaw was found in cgroup1_parse_param in kernel/cgroup/cgroup-v1.c in the Linux kernel's cgroup v1 parser. A local attacker with a user privilege could cause a privilege escalation by exploiting the fsconfig syscall parameter leading to a container breakout and a denial of service on the system." ],
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2022-03-10T00:00:00Z",
    "advisory" : "RHSA-2022:0819",
    "cpe" : "cpe:/a:redhat:enterprise_linux:8::nfv",
    "package" : "kernel-rt-0:4.18.0-348.20.1.rt7.150.el8_5"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2022-03-10T00:00:00Z",
    "advisory" : "RHSA-2022:0825",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8",
    "package" : "kernel-0:4.18.0-348.20.1.el8_5"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2022-03-14T00:00:00Z",
    "advisory" : "RHSA-2022:0849",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8",
    "package" : "kpatch-patch"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.4 Extended Update Support",
    "release_date" : "2022-01-19T00:00:00Z",
    "advisory" : "RHSA-2022:0187",
    "cpe" : "cpe:/a:redhat:rhel_eus:8.4::nfv",
    "package" : "kernel-rt-0:4.18.0-305.34.2.rt7.107.el8_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.4 Extended Update Support",
    "release_date" : "2022-01-19T00:00:00Z",
    "advisory" : "RHSA-2022:0186",
    "cpe" : "cpe:/o:redhat:rhel_eus:8.4",
    "package" : "kernel-0:4.18.0-305.34.2.el8_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.4 Extended Update Support",
    "release_date" : "2022-01-24T00:00:00Z",
    "advisory" : "RHSA-2022:0231",
    "cpe" : "cpe:/o:redhat:rhel_eus:8.4",
    "package" : "kpatch-patch"
  }, {
    "product_name" : "Red Hat Virtualization 4 for Red Hat Enterprise Linux 8",
    "release_date" : "2022-03-14T00:00:00Z",
    "advisory" : "RHSA-2022:0841",
    "cpe" : "cpe:/o:redhat:rhev_hypervisor:4.4::el8",
    "package" : "redhat-virtualization-host-0:4.4.10-202203101736_8.5"
  } ],
  "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" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "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"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2021-4154\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-4154\nhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3b0462726e7ef281c35a7a4ae33e93ee2bc9975b" ],
  "name" : "CVE-2021-4154",
  "mitigation" : {
    "value" : "Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.",
    "lang" : "en:us"
  },
  "csaw" : false
}