CVE-2026-93801

Estado: RecibidaAlta (7)—

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

smb/client: zero-initialize stack-allocated cifs_open_info_data

Stack-allocated cifs_open_info_data may contain random data. This can make some fields have wrong value if they are not set later.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Puntuación base: 7

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.12%
Percentil entre todas las CVEs puntuadas: 2
Fecha de la puntuación: 6/10/2026

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.

ExplotaciónT1068 Exploitation for Privilege Escalationprivilege escalation85 %
Impacto principalT1005 Data from Local Systemcollection60 %
Impacto secundarioT1078 Valid Accountsstealth · persistence · privilege escalation · initial access50 %

Fallo de inicialización en kernel (AV:L, PR:L) permite escalada de privilegios. Lectura de memoria no inicializada puede exponer datos o credenciales 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

Application Developer Guidance Active Directory Configuration User Training User Account Management Threat Intelligence Program Privileged Account Management

Tecnologías afectadas (1)

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

Linux — Linux Kernel^AI

Referencias

JSON original (NVD)

Mostrar

{
  "id": "CVE-2026-93801",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1
      }
    ]
  },
  "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": "fc2f2011d3d84b56f536b4a25a4bb2fa1b13d520",
              "lessThan": "74ff47e6c4213fcfeba2de448d9cbda200507d22",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "057ac50638bcece64b3b436d3a61b70ed6c01a34",
              "lessThan": "22532dd88694ed20bdd47523ffa709f166ce776b",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "057ac50638bcece64b3b436d3a61b70ed6c01a34",
              "lessThan": "8fce4cf4369c766a3293a05419500cbfde72e60d",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "436cfdbc57d98808fce427d9a8d97691374989b3",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "83d3bc866530a36a465b47cce4d2a9def2411960",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6.12.54",
              "lessThan": "6.12.111",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "6.6.113",
              "lessThan": "6.7",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "6.17.4",
              "lessThan": "6.18",
              "versionType": "semver"
            }
          ],
          "programFiles": [
            "fs/smb/client/link.c",
            "fs/smb/client/smb1ops.c",
            "fs/smb/client/smb2ops.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.18"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.18",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.12.111",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "fs/smb/client/link.c",
            "fs/smb/client/smb1ops.c",
            "fs/smb/client/smb2ops.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-24T17:17:13.017",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/22532dd88694ed20bdd47523ffa709f166ce776b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/74ff47e6c4213fcfeba2de448d9cbda200507d22",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/8fce4cf4369c766a3293a05419500cbfde72e60d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb/client: zero-initialize stack-allocated cifs_open_info_data\n\nStack-allocated cifs_open_info_data may contain random data.\nThis can make some fields have wrong value if they are not set later."
    }
  ],
  "lastModified": "2026-09-25T13:17:20.957",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}