« Volver al listado

CVE-2025-68792

Estado: AplazadaAlta (7.8)—

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

tpm2-sessions: Fix out of range indexing in name_size

'name_size' does not have any range checks, and it just directly indexes with TPM_ALG_ID, which could lead into memory corruption at worst.

Address the issue by only processing known values and returning -EINVAL for unrecognized values.

Make also 'tpm_buf_append_name' and 'tpm_buf_fill_hmac_session' fallible so that errors are detected before causing any spurious TPM traffic.

End also the authorization session on failure in both of the functions, as the session state would be then by definition corrupted.

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.

Vulnerabilidad local sin interacción (AV:L, PR:L, UI:N) en kernel Linux que corrompe memoria por indexación fuera de rango; permite escalada de privilegios y potencial manipulación de datos o denegación de servicio.

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

Threat Intelligence ProgramRestrict File and Directory PermissionsRemote Data StorageFilter Network TrafficExecution PreventionEncrypt Sensitive Information

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-2025-68792",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "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": "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": "1085b8276bb4239daa7008f0dcd5c973e4bd690f",
              "lessThan": "47e676ce4d68f461dfcab906f6aeb254f7276deb",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "1085b8276bb4239daa7008f0dcd5c973e4bd690f",
              "lessThan": "04a3aa6e8c5f878cc51a8a1c90b6d3c54079bc43",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "1085b8276bb4239daa7008f0dcd5c973e4bd690f",
              "lessThan": "6e9722e9a7bfe1bbad649937c811076acf86e1fd",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/char/tpm/tpm2-cmd.c",
            "drivers/char/tpm/tpm2-sessions.c",
            "include/linux/tpm.h",
            "security/keys/trusted-keys/trusted_tpm2.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.10"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.10",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.12.66",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.3",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/char/tpm/tpm2-cmd.c",
            "drivers/char/tpm/tpm2-sessions.c",
            "include/linux/tpm.h",
            "security/keys/trusted-keys/trusted_tpm2.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-01-13T16:16:01.090",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/04a3aa6e8c5f878cc51a8a1c90b6d3c54079bc43",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/47e676ce4d68f461dfcab906f6aeb254f7276deb",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6e9722e9a7bfe1bbad649937c811076acf86e1fd",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Deferred",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntpm2-sessions: Fix out of range indexing in name_size\n\n'name_size' does not have any range checks, and it just directly indexes\nwith TPM_ALG_ID, which could lead into memory corruption at worst.\n\nAddress the issue by only processing known values and returning -EINVAL for\nunrecognized values.\n\nMake also 'tpm_buf_append_name' and 'tpm_buf_fill_hmac_session' fallible so\nthat errors are detected before causing any spurious TPM traffic.\n\nEnd also the authorization session on failure in both of the functions, as\nthe session state would be then by definition corrupted."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ntpm2-sessions: Corrección de indexación fuera de rango en name_size\n\n'name_size' no tiene ninguna comprobación de rango, y simplemente indexa directamente con TPM_ALG_ID, lo que podría llevar a corrupción de memoria en el peor de los casos.\n\nAbordar el problema procesando solo valores conocidos y devolviendo -EINVAL para valores no reconocidos.\n\nHacer también 'tpm_buf_append_name' y 'tpm_buf_fill_hmac_session' falibles para que los errores sean detectados antes de causar cualquier tráfico TPM espurio.\n\nFinalizar también la sesión de autorización en caso de fallo en ambas funciones, ya que el estado de la sesión estaría entonces por definición corrupto."
    }
  ],
  "lastModified": "2026-07-30T06:24:44.653",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}