{
  "threat_severity" : "Important",
  "public_date" : "2026-06-03T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: netfilter: nft_inner: Fix IPv6 inner_thoff desync",
    "id" : "2484451",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2484451"
  },
  "cvss3" : {
    "cvss3_base_score" : "7.3",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-823",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\nnetfilter: nft_inner: Fix IPv6 inner_thoff desync\nIn nft_inner_parse_l2l3(), when processing inner IPv6 packets,\nipv6_find_hdr() correctly computes the transport header offset\ntraversing all extension headers, but the result is immediately\noverwritten with nhoff + sizeof(_ip6h) (40 bytes), which only\naccounts for the IPv6 base header. This creates a desync between\ninner_thoff (wrong — points to extension header start) and l4proto\n(correct — e.g., IPPROTO_TCP), enabling transport header forgery\nand potential firewall bypass. This issue affects stable versions\nfrom Linux 6.2.\nFor comparison, the normal (non-inner) IPv6 path correctly\npreserves ipv6_find_hdr()'s result. Removing the incorrect overwrite\nensures that ipv6_find_hdr()'s calculated transport header offset is\npreserved, thereby fixing the desynchronization.", "A flaw was found in the Linux kernel's netfilter subsystem, specifically within the nft_inner module. This vulnerability arises from an incorrect handling of IPv6 inner packet processing, where the transport header offset (inner_thoff) becomes desynchronized from the Layer 4 protocol (l4proto). A remote attacker could exploit this desynchronization to perform transport header forgery, potentially leading to a firewall bypass and allowing unauthorized network access." ],
  "statement" : "This is an Important flaw in the Linux kernel's netfilter subsystem, affecting Red Hat Enterprise Linux systems that process IPv6 inner packets. A remote attacker could exploit a desynchronization issue in the `nft_inner` module to forge transport headers, potentially bypassing firewall rules and gaining unauthorized network access.",
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "release_date" : "2026-07-02T00:00:00Z",
    "advisory" : "RHSA-2026:34911",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10.2",
    "package" : "kernel-0:6.12.0-211.30.1.el10_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 10.0 Extended Update Support",
    "release_date" : "2026-06-29T00:00:00Z",
    "advisory" : "RHSA-2026:33215",
    "cpe" : "cpe:/o:redhat:enterprise_linux_eus:10.0",
    "package" : "kernel-0:6.12.0-55.84.1.el10_0"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2026-07-06T00:00:00Z",
    "advisory" : "RHSA-2026:36018",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-687.22.1.el9_8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2026-07-06T00:00:00Z",
    "advisory" : "RHSA-2026:36018",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-687.22.1.el9_8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions",
    "release_date" : "2026-07-01T00:00:00Z",
    "advisory" : "RHSA-2026:34443",
    "cpe" : "cpe:/a:redhat:rhel_e4s:9.4",
    "package" : "kernel-0:5.14.0-427.135.1.el9_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.6 Extended Update Support",
    "release_date" : "2026-07-01T00:00:00Z",
    "advisory" : "RHSA-2026:34094",
    "cpe" : "cpe:/a:redhat:rhel_eus:9.6",
    "package" : "kernel-0:5.14.0-570.125.1.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" : "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 8",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Fix deferred",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2026-46244\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-46244\nhttps://lore.kernel.org/linux-cve-announce/2026060309-CVE-2026-46244-e8d7@gregkh/T" ],
  "name" : "CVE-2026-46244",
  "csaw" : false
}