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CVE-2026-74287

Estado: RecibidaCrítica (9.1)—

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

sctp: validate embedded address parameter length

sctp_verify_asconf() and sctp_verify_param() only validate ADD_IP, DEL_IP, and SET_PRIMARY parameters against a fixed minimum size of sizeof(struct sctp_addip_param) + sizeof(struct sctp_paramhdr). This ensures the outer parameter is large enough to contain an embedded address parameter header, but does not verify that the embedded address parameter's declared length fits within the bounds of the outer parameter.

Later, sctp_process_param() and sctp_process_asconf_param() extract the embedded address parameter and pass it to af->from_addr_param(), which uses the address parameter length to parse the variable-length address payload.

Leer descripción completaMostrar menos

A malformed peer can therefore advertise an embedded address parameter length that exceeds the remaining bytes in the enclosing parameter.

Validate that addr_param->p.length does not exceed the space available after the sctp_addip_param header before processing the embedded address parameter. Reject malformed parameters when the embedded address length extends beyond the enclosing parameter bounds.

This prevents out-of-bounds reads when parsing malformed parameters carried in INIT or ASCONF processing paths.

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.

Vector CVSS AV:N/AC:L/PR:N sin UI permite explotación remota sin autenticación. La vulnerabilidad permite lecturas fuera de los límites en parámetros SCTP malformados, accediendo a memoria del kernel.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ 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)

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{
  "id": "CVE-2026-74287",
  "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:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.2,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
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              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "lessThan": "06c8bf48505f2fef265931db82d5003d302a347b",
              "versionType": "git"
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              "status": "affected",
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            {
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              "version": "5.15.212",
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            {
              "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/sctp/sm_make_chunk.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-15T06:22:28.220",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/06c8bf48505f2fef265931db82d5003d302a347b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
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      "url": "https://git.kernel.org/stable/c/0c674b20c9cdb54f8a46c88b4d00cadf82b8f0c0",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ed8605c6f39b9b84f9a4631db6deb25e7f1e973c",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: validate embedded address parameter length\n\nsctp_verify_asconf() and sctp_verify_param() only validate ADD_IP, DEL_IP,\nand SET_PRIMARY parameters against a fixed minimum size of sizeof(struct\nsctp_addip_param) + sizeof(struct sctp_paramhdr). This ensures the outer\nparameter is large enough to contain an embedded address parameter header,\nbut does not verify that the embedded address parameter's declared length\nfits within the bounds of the outer parameter.\n\nLater, sctp_process_param() and sctp_process_asconf_param() extract the\nembedded address parameter and pass it to af->from_addr_param(), which uses\nthe address parameter length to parse the variable-length address payload.\nA malformed peer can therefore advertise an embedded address parameter\nlength that exceeds the remaining bytes in the enclosing parameter.\n\nValidate that addr_param->p.length does not exceed the space available\nafter the sctp_addip_param header before processing the embedded address\nparameter. Reject malformed parameters when the embedded address length\nextends beyond the enclosing parameter bounds.\n\nThis prevents out-of-bounds reads when parsing malformed parameters carried\nin INIT or ASCONF processing paths."
    }
  ],
  "lastModified": "2026-08-17T06:19:22.580",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}