{
  "threat_severity" : "Moderate",
  "public_date" : "2023-08-28T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: Use-after-free in nft_verdict_dump due to a race between set GC and transaction",
    "id" : "2235306",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2235306"
  },
  "cvss3" : {
    "cvss3_base_score" : "7.0",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-416",
  "details" : [ "A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation.\nDue to a race condition between nf_tables netlink control plane transaction and nft_set element garbage collection, it is possible to underflow the reference counter causing a use-after-free vulnerability.\nWe recommend upgrading past commit 3e91b0ebd994635df2346353322ac51ce84ce6d8.", "A use-after-free flaw was found in the Linux kernel’s nftables sub-component due to a race problem between the set GC and transaction in the Linux Kernel. This flaw allows a local attacker to crash the system due to a missing call to `nft_set_elem_mark_busy`, causing double deactivation of the element and possibly leading to a kernel information leak problem." ],
  "statement" : "Exploiting this flaw will require CAP_NET_ADMIN access privilege in any user or network namespace.\nAnd,\nOn non-containerized deployments of Red Hat Enterprise Linux, you can disable user namespaces by setting user.max_user_namespaces to 0:\n$ echo \"user.max_user_namespaces=0\" > /etc/sysctl.d/userns.conf\n$ sysctl -p /etc/sysctl.d/userns.conf\nOn containerized deployments, such as Red Hat OpenShift Container Platform, do not use this mitigation as the functionality is needed to be enabled.",
  "acknowledgement" : "Red Hat would like to thank Bien Pham (https://sea.com) (Team Orca of Sea Security Team) for reporting this issue.",
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2024-05-22T00:00:00Z",
    "advisory" : "RHSA-2024:2950",
    "cpe" : "cpe:/a:redhat:enterprise_linux:8::nfv",
    "package" : "kernel-rt-0:4.18.0-553.rt7.342.el8_10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2024-05-22T00:00:00Z",
    "advisory" : "RHSA-2024:3138",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8",
    "package" : "kernel-0:4.18.0-553.el8_10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2024-03-12T00:00:00Z",
    "advisory" : "RHSA-2024:1248",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-362.24.1.el9_3"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2024-03-12T00:00:00Z",
    "advisory" : "RHSA-2024:1248",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-362.24.1.el9_3"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.0 Extended Update Support",
    "release_date" : "2024-05-28T00:00:00Z",
    "advisory" : "RHSA-2024:3421",
    "cpe" : "cpe:/a:redhat:rhel_eus:9.0",
    "package" : "kernel-0:5.14.0-70.101.1.el9_0"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.0 Extended Update Support",
    "release_date" : "2024-05-28T00:00:00Z",
    "advisory" : "RHSA-2024:3414",
    "cpe" : "cpe:/a:redhat:rhel_eus:9.0::nfv",
    "package" : "kernel-rt-0:5.14.0-70.101.1.rt21.173.el9_0"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.2 Extended Update Support",
    "release_date" : "2024-02-28T00:00:00Z",
    "advisory" : "RHSA-2024:1018",
    "cpe" : "cpe:/a:redhat:rhel_eus:9.2",
    "package" : "kernel-0:5.14.0-284.55.1.el9_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.2 Extended Update Support",
    "release_date" : "2024-02-28T00:00:00Z",
    "advisory" : "RHSA-2024:1019",
    "cpe" : "cpe:/a:redhat:rhel_eus:9.2::nfv",
    "package" : "kernel-rt-0:5.14.0-284.55.1.rt14.340.el9_2"
  }, {
    "product_name" : "RHOL-5.8-RHEL-9",
    "release_date" : "2024-05-01T00:00:00Z",
    "advisory" : "RHSA-2024:2094",
    "cpe" : "cpe:/a:redhat:logging:5.8::el9",
    "package" : "openshift-logging/cluster-logging-operator-bundle:v5.8.6-22"
  }, {
    "product_name" : "RHOL-5.8-RHEL-9",
    "release_date" : "2024-05-01T00:00:00Z",
    "advisory" : "RHSA-2024:2094",
    "cpe" : "cpe:/a:redhat:logging:5.8::el9",
    "package" : "openshift-logging/cluster-logging-rhel9-operator:v5.8.6-11"
  }, {
    "product_name" : "RHOL-5.8-RHEL-9",
    "release_date" : "2024-05-01T00:00:00Z",
    "advisory" : "RHSA-2024:2094",
    "cpe" : "cpe:/a:redhat:logging:5.8::el9",
    "package" : "openshift-logging/elasticsearch6-rhel9:v6.8.1-407"
  }, {
    "product_name" : "RHOL-5.8-RHEL-9",
    "release_date" : "2024-05-01T00:00:00Z",
    "advisory" : "RHSA-2024:2094",
    "cpe" : "cpe:/a:redhat:logging:5.8::el9",
    "package" : "openshift-logging/elasticsearch-operator-bundle:v5.8.6-19"
  }, {
    "product_name" : "RHOL-5.8-RHEL-9",
    "release_date" : "2024-05-01T00:00:00Z",
    "advisory" : "RHSA-2024:2094",
    "cpe" : "cpe:/a:redhat:logging:5.8::el9",
    "package" : "openshift-logging/elasticsearch-proxy-rhel9:v1.0.0-479"
  }, {
    "product_name" : "RHOL-5.8-RHEL-9",
    "release_date" : "2024-05-01T00:00:00Z",
    "advisory" : "RHSA-2024:2094",
    "cpe" : "cpe:/a:redhat:logging:5.8::el9",
    "package" : "openshift-logging/elasticsearch-rhel9-operator:v5.8.6-7"
  }, {
    "product_name" : "RHOL-5.8-RHEL-9",
    "release_date" : "2024-05-01T00:00:00Z",
    "advisory" : "RHSA-2024:2094",
    "cpe" : "cpe:/a:redhat:logging:5.8::el9",
    "package" : "openshift-logging/eventrouter-rhel9:v0.4.0-247"
  }, {
    "product_name" : "RHOL-5.8-RHEL-9",
    "release_date" : "2024-05-01T00:00:00Z",
    "advisory" : "RHSA-2024:2094",
    "cpe" : "cpe:/a:redhat:logging:5.8::el9",
    "package" : "openshift-logging/fluentd-rhel9:v5.8.6-5"
  }, {
    "product_name" : "RHOL-5.8-RHEL-9",
    "release_date" : "2024-05-01T00:00:00Z",
    "advisory" : "RHSA-2024:2094",
    "cpe" : "cpe:/a:redhat:logging:5.8::el9",
    "package" : "openshift-logging/log-file-metric-exporter-rhel9:v1.1.0-227"
  }, {
    "product_name" : "RHOL-5.8-RHEL-9",
    "release_date" : "2024-05-01T00:00:00Z",
    "advisory" : "RHSA-2024:2094",
    "cpe" : "cpe:/a:redhat:logging:5.8::el9",
    "package" : "openshift-logging/logging-curator5-rhel9:v5.8.1-470"
  }, {
    "product_name" : "RHOL-5.8-RHEL-9",
    "release_date" : "2024-05-01T00:00:00Z",
    "advisory" : "RHSA-2024:2094",
    "cpe" : "cpe:/a:redhat:logging:5.8::el9",
    "package" : "openshift-logging/logging-loki-rhel9:v2.9.6-14"
  }, {
    "product_name" : "RHOL-5.8-RHEL-9",
    "release_date" : "2024-05-01T00:00:00Z",
    "advisory" : "RHSA-2024:2094",
    "cpe" : "cpe:/a:redhat:logging:5.8::el9",
    "package" : "openshift-logging/logging-view-plugin-rhel9:v5.8.6-2"
  }, {
    "product_name" : "RHOL-5.8-RHEL-9",
    "release_date" : "2024-05-01T00:00:00Z",
    "advisory" : "RHSA-2024:2094",
    "cpe" : "cpe:/a:redhat:logging:5.8::el9",
    "package" : "openshift-logging/loki-operator-bundle:v5.8.6-24"
  }, {
    "product_name" : "RHOL-5.8-RHEL-9",
    "release_date" : "2024-05-01T00:00:00Z",
    "advisory" : "RHSA-2024:2094",
    "cpe" : "cpe:/a:redhat:logging:5.8::el9",
    "package" : "openshift-logging/loki-rhel9-operator:v5.8.6-10"
  }, {
    "product_name" : "RHOL-5.8-RHEL-9",
    "release_date" : "2024-05-01T00:00:00Z",
    "advisory" : "RHSA-2024:2094",
    "cpe" : "cpe:/a:redhat:logging:5.8::el9",
    "package" : "openshift-logging/lokistack-gateway-rhel9:v0.1.0-525"
  }, {
    "product_name" : "RHOL-5.8-RHEL-9",
    "release_date" : "2024-05-01T00:00:00Z",
    "advisory" : "RHSA-2024:2094",
    "cpe" : "cpe:/a:redhat:logging:5.8::el9",
    "package" : "openshift-logging/opa-openshift-rhel9:v0.1.0-224"
  }, {
    "product_name" : "RHOL-5.8-RHEL-9",
    "release_date" : "2024-05-01T00:00:00Z",
    "advisory" : "RHSA-2024:2094",
    "cpe" : "cpe:/a:redhat:logging:5.8::el9",
    "package" : "openshift-logging/vector-rhel9:v0.28.1-56"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Out of support scope",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Out of support scope",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Out of support scope",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2023-4244\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-4244\nhttps://lore.kernel.org/netdev/20230810070830.24064-1-pablo@netfilter.org/\nhttps://lore.kernel.org/netdev/20230815223011.7019-1-fw@strlen.de/" ],
  "name" : "CVE-2023-4244",
  "mitigation" : {
    "value" : "Mitigation for this issue is to skip loading the affected module \"nftables\" onto the system till we have a fix available, this can be done by a blacklist mechanism, this will ensure the driver is not loaded at the boot time.\n~~~\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
}