{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/nft_compat.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "efc17b9240d821c424bc5191a5c6e9384a06293e",
              "status": "affected",
              "version": "0ca743a5599199152a31a7146b83213c786c2eb2",
              "versionType": "git"
            },
            {
              "lessThan": "b3f7a84540a0d014ec42343ff5909657c1bd1994",
              "status": "affected",
              "version": "0ca743a5599199152a31a7146b83213c786c2eb2",
              "versionType": "git"
            },
            {
              "lessThan": "33e1875d6b5b552a2e5652b40074c604199354ee",
              "status": "affected",
              "version": "0ca743a5599199152a31a7146b83213c786c2eb2",
              "versionType": "git"
            },
            {
              "lessThan": "c129b0185e707dce405968e21afccd5728b2ce63",
              "status": "affected",
              "version": "0ca743a5599199152a31a7146b83213c786c2eb2",
              "versionType": "git"
            },
            {
              "lessThan": "9dbba7e694ec045f21ede2f892fb42b81b4e1692",
              "status": "affected",
              "version": "0ca743a5599199152a31a7146b83213c786c2eb2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/nft_compat.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.13"
            },
            {
              "lessThan": "3.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.145",
                  "versionStartIncluding": "3.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.97",
                  "versionStartIncluding": "3.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.40",
                  "versionStartIncluding": "3.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.5",
                  "versionStartIncluding": "3.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "3.13",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nft_compat: ebtables emulation must reject non-bridge targets\n\nxtables targets return netfilter verdicts: NF_ACCEPT, NF_DROP, and so\non.  ebtables targets return incompatible verdicts: EBT_ACCEPT,\nEBT_DROP, ...   We cannot allow fallback to NFPROTO_UNSPEC.\n\nebtables doesn\u0027t permit this since\n11ff7288beb2 (\"netfilter: ebtables: reject non-bridge targets\")\nbut that commit missed the nft_compat layer."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.3,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The bug is reached by installing a bridge-family nft_compat rule through NETLINK_NETFILTER (nftables netlink), which is a local syscall path; packet evaluation on bridge hooks can be driven by traffic, but creating the vulnerable rule state requires local netfilter administration.\nAC:L - Exploitation is deterministic once CAP_NET_ADMIN is held in the target network namespace: xt_request_find_target() falls back to NFPROTO_UNSPEC targets, nft_target_eval_bridge() misinterprets xtables verdicts, and sending matching bridge traffic reliably triggers the faulty evaluation (e.g. NULL ct in nf_nat_setup_info()).\nPR:L - All nfnetlink entry points are gated by netlink_net_capable(..., CAP_NET_ADMIN), which checks the socket network namespace user namespace; unprivileged local users routinely obtain this capability via user+network namespaces (unshare -Urn), matching the reporters\u0027 nft_compat reproduction model.\nUI:N - No victim interaction is required beyond the attacker obtaining namespace-local CAP_NET_ADMIN and installing the malicious bridge nft_compat rule; subsequent packet delivery to the bridge hook is automatic once the rule is committed.\nS:U - Impact is confined to the host kernel and its network filtering state; this is not a VM escape, hypervisor boundary crossing, or IOMMU/DMA sandbox bypass, but standard in-kernel netfilter misbehavior within the same security authority.\nC:L - The primary primitive is verdict-namespace type confusion between xtables (NF_*) and ebtables (EBT_*) return conventions; while no arbitrary read is demonstrated, a triggered kernel oops from NULL ct dereference in nf_nat_setup_info() can expose kernel pointers in crash logs accessible to the local attacker.\nI:H - Incompatible verdict translation lets xtables targets run under ebtables semantics: XT_CONTINUE (0xFFFFFFFF/-1) is mapped to EBT_ACCEPT/NF_ACCEPT instead of continuing rule evaluation, and mis-instantiated targets such as SNAT/DNAT can alter connection-tracking/NAT state before faulting, constituting type-confusion integrity impact.\nA:H - Installing an IP-family UNSPEC target (e.g. SNAT/DNAT rev 1/2) in a bridge nft_compat chain and passing traffic causes nf_nat_setup_info() to dereference a NULL nf_conn from nf_ct_get(), producing a kernel oops/panic; repeated bridge traffic can retrigger the crash for sustained denial of service."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:43:56.159Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/efc17b9240d821c424bc5191a5c6e9384a06293e"
        },
        {
          "url": "https://git.kernel.org/stable/c/b3f7a84540a0d014ec42343ff5909657c1bd1994"
        },
        {
          "url": "https://git.kernel.org/stable/c/33e1875d6b5b552a2e5652b40074c604199354ee"
        },
        {
          "url": "https://git.kernel.org/stable/c/c129b0185e707dce405968e21afccd5728b2ce63"
        },
        {
          "url": "https://git.kernel.org/stable/c/9dbba7e694ec045f21ede2f892fb42b81b4e1692"
        }
      ],
      "title": "netfilter: nft_compat: ebtables emulation must reject non-bridge targets",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-72416",
    "datePublished": "2026-08-15T05:56:36.886Z",
    "dateReserved": "2026-08-09T03:40:39.927Z",
    "dateUpdated": "2026-08-17T05:43:56.159Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}