{
  "threat_severity" : "Important",
  "public_date" : "2023-07-21T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: net/sched: cls_u32 component reference counter leak if tcf_change_indev() fails",
    "id" : "2225201",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2225201"
  },
  "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-415",
  "details" : [ "A use-after-free vulnerability in the Linux kernel's net/sched: cls_u32 component can be exploited to achieve local privilege escalation.\nIf tcf_change_indev() fails, u32_set_parms() will immediately return an error after incrementing or decrementing the reference counter in tcf_bind_filter(). If an attacker can control the reference counter and set it to zero, they can cause the reference to be freed, leading to a use-after-free vulnerability.\nWe recommend upgrading past commit 04c55383fa5689357bcdd2c8036725a55ed632bc.", "A double-free flaw was found in u32_set_parms in net/sched/cls_u32.c in the Network Scheduler component in the Linux kernel. This flaw allows a local attacker to use a failure event to mishandle the reference counter, leading to a local privilege escalation threat." ],
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 7",
    "release_date" : "2023-10-10T00:00:00Z",
    "advisory" : "RHSA-2023:5621",
    "cpe" : "cpe:/a:redhat:rhel_extras_rt:7",
    "package" : "kernel-rt-0:3.10.0-1160.102.1.rt56.1250.el7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "release_date" : "2023-10-10T00:00:00Z",
    "advisory" : "RHSA-2023:5574",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7",
    "package" : "kpatch-patch"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "release_date" : "2023-10-10T00:00:00Z",
    "advisory" : "RHSA-2023:5622",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7",
    "package" : "kernel-0:3.10.0-1160.102.1.el7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7.6 Advanced Update Support(Disable again in 2026 - SPRHEL-7118)",
    "release_date" : "2023-11-15T00:00:00Z",
    "advisory" : "RHSA-2023:7294",
    "cpe" : "cpe:/o:redhat:rhel_aus:7.6",
    "package" : "kernel-0:3.10.0-957.108.1.el7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7.7 Advanced Update Support",
    "release_date" : "2024-02-27T00:00:00Z",
    "advisory" : "RHSA-2024:0999",
    "cpe" : "cpe:/o:redhat:rhel_aus:7.7",
    "package" : "kernel-0:3.10.0-1062.85.1.el7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2023-11-14T00:00:00Z",
    "advisory" : "RHSA-2023:6901",
    "cpe" : "cpe:/a:redhat:enterprise_linux:8::nfv",
    "package" : "kernel-rt-0:4.18.0-513.5.1.rt7.307.el8_9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2023-11-14T00:00:00Z",
    "advisory" : "RHSA-2023:7077",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8",
    "package" : "kernel-0:4.18.0-513.5.1.el8_9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions",
    "release_date" : "2023-11-08T00:00:00Z",
    "advisory" : "RHSA-2023:6799",
    "cpe" : "cpe:/o:redhat:rhel_e4s:8.1",
    "package" : "kpatch-patch"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions",
    "release_date" : "2023-11-08T00:00:00Z",
    "advisory" : "RHSA-2023:6813",
    "cpe" : "cpe:/o:redhat:rhel_e4s:8.1",
    "package" : "kernel-0:4.18.0-147.94.1.el8_1"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.2 Advanced Update Support",
    "release_date" : "2023-11-21T00:00:00Z",
    "advisory" : "RHSA-2023:7434",
    "cpe" : "cpe:/o:redhat:rhel_aus:8.2",
    "package" : "kernel-0:4.18.0-193.119.1.el8_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.2 Telecommunications Update Service",
    "release_date" : "2023-11-21T00:00:00Z",
    "advisory" : "RHSA-2023:7431",
    "cpe" : "cpe:/a:redhat:rhel_tus:8.2::nfv",
    "package" : "kernel-rt-0:4.18.0-193.119.1.rt13.170.el8_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.2 Telecommunications Update Service",
    "release_date" : "2023-11-21T00:00:00Z",
    "advisory" : "RHSA-2023:7434",
    "cpe" : "cpe:/o:redhat:rhel_tus:8.2",
    "package" : "kernel-0:4.18.0-193.119.1.el8_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions",
    "release_date" : "2023-11-21T00:00:00Z",
    "advisory" : "RHSA-2023:7417",
    "cpe" : "cpe:/o:redhat:rhel_e4s:8.2",
    "package" : "kpatch-patch"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions",
    "release_date" : "2023-11-21T00:00:00Z",
    "advisory" : "RHSA-2023:7434",
    "cpe" : "cpe:/o:redhat:rhel_e4s:8.2",
    "package" : "kernel-0:4.18.0-193.119.1.el8_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support",
    "release_date" : "2023-10-10T00:00:00Z",
    "advisory" : "RHSA-2023:5628",
    "cpe" : "cpe:/o:redhat:rhel_aus:8.4",
    "package" : "kernel-0:4.18.0-305.108.1.el8_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.4 Telecommunications Update Service",
    "release_date" : "2023-10-17T00:00:00Z",
    "advisory" : "RHSA-2023:5794",
    "cpe" : "cpe:/a:redhat:rhel_tus:8.4::nfv",
    "package" : "kernel-rt-0:4.18.0-305.108.1.rt7.183.el8_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.4 Telecommunications Update Service",
    "release_date" : "2023-10-10T00:00:00Z",
    "advisory" : "RHSA-2023:5628",
    "cpe" : "cpe:/o:redhat:rhel_tus:8.4",
    "package" : "kernel-0:4.18.0-305.108.1.el8_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions",
    "release_date" : "2023-10-10T00:00:00Z",
    "advisory" : "RHSA-2023:5628",
    "cpe" : "cpe:/o:redhat:rhel_e4s:8.4",
    "package" : "kernel-0:4.18.0-305.108.1.el8_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions",
    "release_date" : "2023-10-17T00:00:00Z",
    "advisory" : "RHSA-2023:5775",
    "cpe" : "cpe:/o:redhat:rhel_e4s:8.4",
    "package" : "kpatch-patch"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.6 Extended Update Support",
    "release_date" : "2023-11-21T00:00:00Z",
    "advisory" : "RHSA-2023:7398",
    "cpe" : "cpe:/o:redhat:rhel_eus:8.6",
    "package" : "kernel-0:4.18.0-372.80.1.el8_6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.6 Extended Update Support",
    "release_date" : "2023-11-21T00:00:00Z",
    "advisory" : "RHSA-2023:7410",
    "cpe" : "cpe:/o:redhat:rhel_eus:8.6",
    "package" : "kpatch-patch"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.8 Extended Update Support",
    "release_date" : "2023-11-28T00:00:00Z",
    "advisory" : "RHSA-2023:7539",
    "cpe" : "cpe:/o:redhat:rhel_eus:8.8",
    "package" : "kernel-0:4.18.0-477.36.1.el8_8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.8 Extended Update Support",
    "release_date" : "2023-11-28T00:00:00Z",
    "advisory" : "RHSA-2023:7558",
    "cpe" : "cpe:/o:redhat:rhel_eus:8.8",
    "package" : "kpatch-patch"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2023-11-07T00:00:00Z",
    "advisory" : "RHSA-2023:6583",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-362.8.1.el9_3"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2023-11-07T00:00:00Z",
    "advisory" : "RHSA-2023:6583",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-362.8.1.el9_3"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.0 Extended Update Support",
    "release_date" : "2024-03-12T00:00:00Z",
    "advisory" : "RHSA-2024:1250",
    "cpe" : "cpe:/a:redhat:rhel_eus:9.0",
    "package" : "kernel-0:5.14.0-70.93.2.el9_0"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.0 Extended Update Support",
    "release_date" : "2024-03-13T00:00:00Z",
    "advisory" : "RHSA-2024:1306",
    "cpe" : "cpe:/a:redhat:rhel_eus:9.0::nfv",
    "package" : "kernel-rt-0:5.14.0-70.93.1.rt21.165.el9_0"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.0 Extended Update Support",
    "release_date" : "2024-03-12T00:00:00Z",
    "advisory" : "RHSA-2024:1253",
    "cpe" : "cpe:/o:redhat:rhel_eus:9.0",
    "package" : "kpatch-patch"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.2 Extended Update Support",
    "release_date" : "2023-11-21T00:00:00Z",
    "advisory" : "RHSA-2023:7370",
    "cpe" : "cpe:/a:redhat:rhel_eus:9.2",
    "package" : "kernel-0:5.14.0-284.40.1.el9_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.2 Extended Update Support",
    "release_date" : "2023-11-21T00:00:00Z",
    "advisory" : "RHSA-2023:7379",
    "cpe" : "cpe:/a:redhat:rhel_eus:9.2::nfv",
    "package" : "kernel-rt-0:5.14.0-284.40.1.rt14.325.el9_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.2 Extended Update Support",
    "release_date" : "2023-11-21T00:00:00Z",
    "advisory" : "RHSA-2023:7418",
    "cpe" : "cpe:/o:redhat:rhel_eus:9.2",
    "package" : "kpatch-patch"
  }, {
    "product_name" : "Red Hat Virtualization 4 for Red Hat Enterprise Linux 8",
    "release_date" : "2023-11-21T00:00:00Z",
    "advisory" : "RHSA-2023:7398",
    "cpe" : "cpe:/o:redhat:rhev_hypervisor:4.4::el8",
    "package" : "kernel-0:4.18.0-372.80.1.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 9",
    "fix_state" : "Affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2023-3609\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-3609\nhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=04c55383fa5689357bcdd2c8036725a55ed632bc" ],
  "name" : "CVE-2023-3609",
  "mitigation" : {
    "value" : "To mitigate this issue, prevent module cls_u32 from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.",
    "lang" : "en:us"
  },
  "csaw" : false
}