Skip to content
Heist/ feed
High

netfilter: xt_nat: reject unsupported target families

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_nat: reject unsupported target families xt_nat SNAT and DNAT target handlers assume IP-family conntrack state is present and can dereference a NULL pointer when instantiated from an unsupported family through nft_compat. A bridge-family compat rule can therefore trigger a NULL-dereference in nf_nat_setup_info(). Reject non-IP families in xt_nat_checkentry() so unsupported targets cannot be installed. Keep NFPROTO_INET allowed for valid inet NAT compat users and leave the runtime fast path unchanged. [ The crash was fixed via 9dbba7e694ec ("netfilter: nft_compat: ebtables emulation must reject non-bridge targets"), so this patch is no longer critical. Nevertheless, NAT is only relevant for ipv4/ipv6, so this extra family check is a good idea in any case. ]

Announced Source revision 1
Original source ↗

CVE-2026-80664

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-80664

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "c7232c9979cba684c50b64c513c4a83c9aa70563",
        "lessThan": "49abe564391411057a26a9a943c8e17867c3b9b4",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c7232c9979cba684c50b64c513c4a83c9aa70563",
        "lessThan": "0afc9ad987c0faa80ab5f8d6e7815085ac8dbb82",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c7232c9979cba684c50b64c513c4a83c9aa70563",
        "lessThan": "4fbc2bac02edabb665beb2aa87ca6f1e1d4c4777",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c7232c9979cba684c50b64c513c4a83c9aa70563",
        "lessThan": "a842dab87cab29f2a5798a47b2dc5e6a449950bf",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c7232c9979cba684c50b64c513c4a83c9aa70563",
        "lessThan": "e35c048d7511e9d4c2a537b8a231c49606e97c16",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c7232c9979cba684c50b64c513c4a83c9aa70563",
        "lessThan": "679ced28a9dc2f6dc679eb05027d779693e60902",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c7232c9979cba684c50b64c513c4a83c9aa70563",
        "lessThan": "ec88fa71c82072e9189983b05b499d3507550271",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c7232c9979cba684c50b64c513c4a83c9aa70563",
        "lessThan": "5d1a2240935ea47e2673d0ea17fdb058e4dc91dd",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/netfilter/xt_nat.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.7"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.7",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.261",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.212",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.178",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.145",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.97",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.40",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.5",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/netfilter/xt_nat.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-80664

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#34352 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement