{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "c7232c9979cba684c50b64c513c4a83c9aa70563"
            },
            {
              "fixed": "49abe564391411057a26a9a943c8e17867c3b9b4"
            },
            {
              "fixed": "0afc9ad987c0faa80ab5f8d6e7815085ac8dbb82"
            },
            {
              "fixed": "4fbc2bac02edabb665beb2aa87ca6f1e1d4c4777"
            },
            {
              "fixed": "a842dab87cab29f2a5798a47b2dc5e6a449950bf"
            },
            {
              "fixed": "e35c048d7511e9d4c2a537b8a231c49606e97c16"
            },
            {
              "fixed": "679ced28a9dc2f6dc679eb05027d779693e60902"
            },
            {
              "fixed": "ec88fa71c82072e9189983b05b499d3507550271"
            },
            {
              "fixed": "5d1a2240935ea47e2673d0ea17fdb058e4dc91dd"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.7.0"
            },
            {
              "fixed": "5.10.261"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.212"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.178"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.145"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.97"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.40"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80664.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: xt_nat: reject unsupported target families\n\nxt_nat SNAT and DNAT target handlers assume IP-family conntrack state\nis present and can dereference a NULL pointer when instantiated from an\nunsupported family through nft_compat. A bridge-family compat rule can\ntherefore trigger a NULL-dereference in nf_nat_setup_info().\n\nReject non-IP families in xt_nat_checkentry() so unsupported targets\ncannot be installed. Keep NFPROTO_INET allowed for valid inet NAT\ncompat users and leave the runtime fast path unchanged.\n\n[ The crash was fixed via\n  9dbba7e694ec (\"netfilter: nft_compat: ebtables emulation must reject non-bridge targets\"),\n  so this patch is no longer critical.\n  Nevertheless, NAT is only relevant for ipv4/ipv6, so this extra\n  family check is a good idea in any case. ]",
  "id": "CVE-2026-80664",
  "modified": "2026-08-31T03:30:30.632553524Z",
  "published": "2026-08-28T06:49:07.478Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0afc9ad987c0faa80ab5f8d6e7815085ac8dbb82"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/49abe564391411057a26a9a943c8e17867c3b9b4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4fbc2bac02edabb665beb2aa87ca6f1e1d4c4777"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5d1a2240935ea47e2673d0ea17fdb058e4dc91dd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/679ced28a9dc2f6dc679eb05027d779693e60902"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a842dab87cab29f2a5798a47b2dc5e6a449950bf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e35c048d7511e9d4c2a537b8a231c49606e97c16"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ec88fa71c82072e9189983b05b499d3507550271"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80664.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80664"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "netfilter: xt_nat: reject unsupported target families"
}