« Volver al listado

CVE-2026-19783

Estado: AnalizadaAlta (7.8)—

IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a local attacker to cause kernel memory corruption due to insufficient validation. A crafted filesystem image can trigger an out-of-bounds kernel-stack write during directory reads, causing a system crash or potentially enabling privilege escalation.

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.

AV:L sin UI requiere T1068. El texto cita corrupción de memoria del kernel (ejecutable) y crash (DoS), potencial escalada de privilegios confirmada en el vector (I:H).

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

Tecnologías afectadas (2)

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-19783",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-19783",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-08-22T03:55:47.497825Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "psirt@us.ibm.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.7,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 0.8
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "psirt@us.ibm.com",
      "affectedData": [
        {
          "cpes": [
            "cpe:2.3:a:ibm:aix:7.2:*:*:*:*:*:*:*",
            "cpe:2.3:a:ibm:aix:7.2.0:*:*:*:*:*:*:*",
            "cpe:2.3:a:ibm:aix:7.3:*:*:*:*:*:*:*",
            "cpe:2.3:a:ibm:aix:7.3.0:*:*:*:*:*:*:*"
          ],
          "vendor": "IBM",
          "product": "AIX",
          "versions": [
            {
              "status": "affected",
              "version": "7.2"
            },
            {
              "status": "affected",
              "version": "7.3"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:a:ibm:powervm_vios:4.1:*:*:*:*:*:*:*",
            "cpe:2.3:a:ibm:powervm_vios:4.1.0:*:*:*:*:*:*:*"
          ],
          "vendor": "IBM",
          "product": "PowerVM VIOS",
          "versions": [
            {
              "status": "affected",
              "version": "4.1"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-08-20T22:17:18.773",
  "references": [
    {
      "url": "https://www.ibm.com/support/pages/node/7283858",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "psirt@us.ibm.com"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "psirt@us.ibm.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a local attacker to cause kernel memory corruption due to insufficient validation. A crafted filesystem image can trigger an out-of-bounds kernel-stack write during directory reads, causing a system crash or potentially enabling privilege escalation."
    }
  ],
  "lastModified": "2026-08-26T15:16:47.223",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:ibm:vios:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "4A14B743-DDD2-467F-90E7-3431CE35F835",
              "versionEndExcluding": "4.1.0.50",
              "versionStartIncluding": "4.1.0"
            },
            {
              "criteria": "cpe:2.3:a:ibm:vios:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "37B446F0-EE99-42EA-99EE-80E517FDCB78",
              "versionEndExcluding": "4.1.1.30",
              "versionStartIncluding": "4.1.1.0"
            },
            {
              "criteria": "cpe:2.3:a:ibm:vios:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "6245F535-1896-4CC5-8EC9-89C8EF455B8C",
              "versionEndExcluding": "4.1.2.20",
              "versionStartIncluding": "4.1.2.0"
            }
          ],
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:ibm:aix:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "EB84A37D-4C98-44FC-8B9B-E14DA7C88ED5",
              "versionEndIncluding": "7.2.5.212",
              "versionStartIncluding": "7.2.5"
            },
            {
              "criteria": "cpe:2.3:o:ibm:aix:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "EA55F75D-C50C-46D2-93CC-EABB8F49B03F",
              "versionEndIncluding": "7.3.2.5",
              "versionStartIncluding": "7.3.2"
            },
            {
              "criteria": "cpe:2.3:o:ibm:aix:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B4115FCC-1026-417E-8D30-237B2C90367E",
              "versionEndIncluding": "7.3.3.2",
              "versionStartIncluding": "7.3.3"
            },
            {
              "criteria": "cpe:2.3:o:ibm:aix:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "340ADD53-8363-4CDA-AEEB-8DC7CB0088D5",
              "versionEndIncluding": "7.3.4.1",
              "versionStartIncluding": "7.3.4"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "psirt@us.ibm.com"
}