« Volver al listado

CVE-2026-72320

Estado: RecibidaCrítica (9.1)—

In the Linux kernel, the following vulnerability has been resolved:

netfilter: nft_lookup: fix catchall element handling with inverted lookups

nft_lookup_eval() decides whether a lookup matched (`found`) from the direct set lookup and priv->invert before falling back to the catchall element used by interval sets (e.g. nft_set_rbtree) for the open-ended default range. Since `found` is never recomputed after `ext` is replaced by the catchall lookup, inverted lookups (NFT_LOOKUP_F_INV, "!= @set") can wrongly match or wrongly skip the catchall element, producing the wrong verdict. Fold the catchall lookup into `ext` before computing `found`, matching the order already used by nft_objref_map_eval().

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Inferido por reglas deterministas a partir del vector CVSS y la CWE. Solo orientativo.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Vulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkFilter Network TrafficApplication Isolation and Sandboxing

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-72320",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.1,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.2,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "aaa31047a6d25da0fa101da1ed544e1247949b40",
              "lessThan": "0ab8880865f9678eb6174e72c1fc4712e44c745c",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "aaa31047a6d25da0fa101da1ed544e1247949b40",
              "lessThan": "238c612357b5a25f03eacf356f95034f8551f218",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "aaa31047a6d25da0fa101da1ed544e1247949b40",
              "lessThan": "ef0c7d4b04a0e6ad175323c24bc84e11470dd79d",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "aaa31047a6d25da0fa101da1ed544e1247949b40",
              "lessThan": "e6107a4c74b54cb33e3bce162a63048ae5a6b198",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "net/netfilter/nft_lookup.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.13"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "5.13",
              "versionType": "semver"
            },
            {
              "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/nft_lookup.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-15T06:22:04.993",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/0ab8880865f9678eb6174e72c1fc4712e44c745c",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/238c612357b5a25f03eacf356f95034f8551f218",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e6107a4c74b54cb33e3bce162a63048ae5a6b198",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ef0c7d4b04a0e6ad175323c24bc84e11470dd79d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nft_lookup: fix catchall element handling with inverted lookups\n\nnft_lookup_eval() decides whether a lookup matched (`found`) from the\ndirect set lookup and priv->invert before falling back to the\ncatchall element used by interval sets (e.g. nft_set_rbtree) for the\nopen-ended default range. Since `found` is never recomputed after\n`ext` is replaced by the catchall lookup, inverted lookups\n(NFT_LOOKUP_F_INV, \"!= @set\") can wrongly match or wrongly skip the\ncatchall element, producing the wrong verdict. Fold the catchall\nlookup into `ext` before computing `found`, matching the order\nalready used by nft_objref_map_eval()."
    }
  ],
  "lastModified": "2026-08-17T06:18:35.467",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}