{
  "threat_severity" : "Moderate",
  "public_date" : "2026-06-03T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP",
    "id" : "2484456",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2484456"
  },
  "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" : "draft"
  },
  "cwe" : "CWE-1287",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\ninet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP\nYizhou Zhao reported that simply having one RAW socket on protocol\nIPPROTO_RAW (255) was dangerous.\nsocket(AF_INET, SOCK_RAW, 255);\nA malicious incoming ICMP packet can set the protocol field to 255\nand match this socket, leading to FNHE cache changes.\ninner = IP(src=\"192.168.2.1\", dst=\"8.8.8.8\", proto=255)/Raw(\"TEST\")\npkt = IP(src=\"192.168.1.1\", dst=\"192.168.2.1\")/ICMP(type=3, code=4, nexthopmtu=576)/inner\n\"man 7 raw\" states:\nA protocol of IPPROTO_RAW implies enabled IP_HDRINCL and is able\nto send any IP protocol that is specified in the passed header.\nReceiving of all IP protocols via IPPROTO_RAW is not possible\nusing raw sockets.\nMake sure we drop these malicious packets.", "A flaw was found in the Linux kernel's handling of RAW sockets using IPPROTO_RAW. A remote attacker could send a specially crafted ICMP (Internet Control Message Protocol) packet. This malicious packet could set the protocol field to 255, causing it to be processed by a RAW socket configured for IPPROTO_RAW. This leads to unintended FNHE (Flow N-tuple Hash Entry) cache changes, which could result in unexpected network behavior." ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "fix_state" : "Affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10"
  }, {
    "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" : "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 8",
    "fix_state" : "Affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "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-2026-46266\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-46266\nhttps://lore.kernel.org/linux-cve-announce/2026060337-CVE-2026-46266-1e5e@gregkh/T" ],
  "name" : "CVE-2026-46266",
  "csaw" : false
}