{
  "threat_severity" : "Moderate",
  "public_date" : "2025-10-15T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: i40e: add validation for ring_len param",
    "id" : "2404116",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2404116"
  },
  "cvss3" : {
    "cvss3_base_score" : "7.5",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-131",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\ni40e: add validation for ring_len param\nThe `ring_len` parameter provided by the virtual function (VF)\nis assigned directly to the hardware memory context (HMC) without\nany validation.\nTo address this, introduce an upper boundary check for both Tx and Rx\nqueue lengths. The maximum number of descriptors supported by the\nhardware is 8k-32.\nAdditionally, enforce alignment constraints: Tx rings must be a multiple\nof 8, and Rx rings must be a multiple of 32.", "A flaw was identified in the Intel “i40e” Ethernet driver in the Linux Kernel where the ring_len parameter supplied by a VF (virtual function) is passed unchecked to the hardware memory context. If a malicious  Virtual function provides a too-large or misaligned ring_len, it may allow the device to configure excessive Tx/Rx queue length leading to memory corruption or other undefined behaviour in the driver context." ],
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "release_date" : "2025-12-01T00:00:00Z",
    "advisory" : "RHSA-2025:22395",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10.1",
    "package" : "kernel-0:6.12.0-124.16.1.el10_1"
  }, {
    "product_name" : "Red Hat Enterprise Linux 10.0 Extended Update Support",
    "release_date" : "2025-12-02T00:00:00Z",
    "advisory" : "RHSA-2025:22571",
    "cpe" : "cpe:/o:redhat:enterprise_linux_eus:10.0",
    "package" : "kernel-0:6.12.0-55.47.1.el10_0"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2025-11-24T00:00:00Z",
    "advisory" : "RHSA-2025:21920",
    "cpe" : "cpe:/a:redhat:enterprise_linux:8::nfv",
    "package" : "kernel-rt-0:4.18.0-553.85.1.rt7.426.el8_10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2025-11-24T00:00:00Z",
    "advisory" : "RHSA-2025:21917",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8",
    "package" : "kernel-0:4.18.0-553.85.1.el8_10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.2 Advanced Update Support",
    "release_date" : "2026-01-15T00:00:00Z",
    "advisory" : "RHSA-2026:0643",
    "cpe" : "cpe:/o:redhat:rhel_aus:8.2",
    "package" : "kernel-0:4.18.0-193.181.1.el8_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support",
    "release_date" : "2026-01-14T00:00:00Z",
    "advisory" : "RHSA-2026:0536",
    "cpe" : "cpe:/o:redhat:rhel_aus:8.6",
    "package" : "kernel-0:4.18.0-372.175.1.el8_6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.6 Telecommunications Update Service",
    "release_date" : "2026-01-14T00:00:00Z",
    "advisory" : "RHSA-2026:0536",
    "cpe" : "cpe:/o:redhat:rhel_tus:8.6",
    "package" : "kernel-0:4.18.0-372.175.1.el8_6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions",
    "release_date" : "2026-01-14T00:00:00Z",
    "advisory" : "RHSA-2026:0536",
    "cpe" : "cpe:/o:redhat:rhel_e4s:8.6",
    "package" : "kernel-0:4.18.0-372.175.1.el8_6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2025-11-17T00:00:00Z",
    "advisory" : "RHSA-2025:21469",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-611.8.1.el9_7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2025-11-17T00:00:00Z",
    "advisory" : "RHSA-2025:21469",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-611.8.1.el9_7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.4 Extended Update Support",
    "release_date" : "2026-01-07T00:00:00Z",
    "advisory" : "RHSA-2026:0173",
    "cpe" : "cpe:/a:redhat:rhel_eus:9.4",
    "package" : "kernel-0:5.14.0-427.104.1.el9_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.6 Extended Update Support",
    "release_date" : "2025-11-24T00:00:00Z",
    "advisory" : "RHSA-2025:21933",
    "cpe" : "cpe:/a:redhat:rhel_eus:9.6",
    "package" : "kernel-0:5.14.0-570.66.1.el9_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" : "Affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Affected",
    "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-2025-39973\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-39973\nhttps://lore.kernel.org/linux-cve-announce/2025101557-CVE-2025-39973-b1a3@gregkh/T" ],
  "name" : "CVE-2025-39973",
  "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
}