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CVE-2026-88816

Estado: AplazadaAlta (7.5)—

DBI versions before 1.654 for Perl incorrectly treat numeric values as strings in FetchHashKeyName.

fetchrow_hashref uses the string pointer of the FetchHashKeyName attribute as the key name without stringifying it first. When FetchHashKeyName has been set to an integer (IV) or floating-point (NV) value, that pointer is invalid, so reading the key name triggers a segmentation fault.

This can be triggered with the following code:

Detalles técnicos trazas, registros y código del informe original
   my $dbh = DBI->connect( "dbi:ExampleP:", "", "",
       { RaiseError => 0, PrintError => 0 } );
   $dbh->{FetchHashKeyName} = 42;

   my $sth = $dbh->prepare("select mode, size, name from .");
   $sth->execute;
   $sth->fetchrow_hashref;

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:N sin autenticación permite explotación remota de aplicación (T1190). La lectura de puntero inválido causa crash del proceso → DoS de aplicación (T1499.004).

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

Filter Network TrafficVulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkApplication 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.

Perl — DBIAI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-88816",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-88816",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-09-30T19:51:15.598426Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "affectedData": [
        {
          "repo": "https://github.com/perl5-dbi/dbi",
          "modules": [
            "DBI"
          ],
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "1.654",
              "versionType": "custom"
            }
          ],
          "packageURL": "pkg:cpan/DBI",
          "packageName": "DBI",
          "programFiles": [
            "DBI.xs"
          ],
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "programRoutines": [
            {
              "name": "DBD::_::st::fetchrow_hashref"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-09-28T17:17:52.203",
  "references": [
    {
      "url": "https://github.com/perl5-dbi/dbi/commit/70962570212dc60a5428098cf2a0462ad5945851.patch",
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    },
    {
      "url": "https://github.com/perl5-dbi/dbi/security/advisories/GHSA-f4qx-mr9m-q2hq",
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    },
    {
      "url": "https://metacpan.org/release/HMBRAND/DBI-1.654/changes",
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2026/09/28/13",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/perl5-dbi/dbi/security/advisories/GHSA-f4qx-mr9m-q2hq",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "description": [
        {
          "lang": "en",
          "value": "CWE-843"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "DBI versions before 1.654 for Perl incorrectly treat numeric values as strings in FetchHashKeyName.\n\nfetchrow_hashref uses the string pointer of the FetchHashKeyName attribute as the key name without stringifying it first. When FetchHashKeyName has been set to an integer (IV) or floating-point (NV) value, that pointer is invalid, so reading the key name triggers a segmentation fault.\n\nThis can be triggered with the following code:\n\n   my $dbh = DBI->connect( \"dbi:ExampleP:\", \"\", \"\",\n       { RaiseError => 0, PrintError => 0 } );\n   $dbh->{FetchHashKeyName} = 42;\n\n   my $sth = $dbh->prepare(\"select mode, size, name from .\");\n   $sth->execute;\n   $sth->fetchrow_hashref;"
    }
  ],
  "lastModified": "2026-09-30T20:17:35.557",
  "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
}