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CVE-2023-54280

Estado: AplazadaCrítica (9.8)—

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

cifs: fix potential race when tree connecting ipc

Protect access of TCP_Server_Info::hostname when building the ipc tree name as it might get freed in cifsd thread and thus causing an use-after-free bug in __tree_connect_dfs_target(). Also, while at it, update status of IPC tcon on success and then avoid any extra tree connects.

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 en kernel Linux con acceso remoto sin autenticación (AV:N/PR:N) que causa use-after-free. Impacta disponibilidad (DoS) y confidencialidad por lectura de memoria 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

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.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

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{
  "id": "CVE-2023-54280",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "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": "c88f7dcd6d6429197fc2fd87b54a894ffcd48e8e",
              "lessThan": "536ec71ba060a02fabe8e22cecb82fe7b3a8708b",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "c88f7dcd6d6429197fc2fd87b54a894ffcd48e8e",
              "lessThan": "553476df55a111e6a66ad9155256aec0ec1b7ad0",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "c88f7dcd6d6429197fc2fd87b54a894ffcd48e8e",
              "lessThan": "ee20d7c6100752eaf2409d783f4f1449c29ea33d",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "81d583baa5f1abd73c755ce1992929debd20b687",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5.15.81",
              "lessThan": "5.16",
              "versionType": "semver"
            }
          ],
          "programFiles": [
            "fs/cifs/dfs.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.16"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "5.16",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.2.15",
              "versionType": "semver",
              "lessThanOrEqual": "6.2.*"
            },
            {
              "status": "unaffected",
              "version": "6.3.2",
              "versionType": "semver",
              "lessThanOrEqual": "6.3.*"
            },
            {
              "status": "unaffected",
              "version": "6.4",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "fs/cifs/dfs.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-12-30T13:16:16.970",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/536ec71ba060a02fabe8e22cecb82fe7b3a8708b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/553476df55a111e6a66ad9155256aec0ec1b7ad0",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ee20d7c6100752eaf2409d783f4f1449c29ea33d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Deferred",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: fix potential race when tree connecting ipc\n\nProtect access of TCP_Server_Info::hostname when building the ipc tree\nname as it might get freed in cifsd thread and thus causing an\nuse-after-free bug in __tree_connect_dfs_target().  Also, while at it,\nupdate status of IPC tcon on success and then avoid any extra tree\nconnects."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ncifs: corregir una posible condición de carrera al conectar el árbol ipc\n\nProteger el acceso a TCP_Server_Info::hostname al construir el nombre del árbol ipc, ya que podría ser liberado en el hilo cifsd y así causar un error de uso después de liberación en __tree_connect_dfs_target(). Además, ya que estamos en ello, actualizar el estado de IPC tcon en caso de éxito y luego evitar cualquier conexión de árbol adicional."
    }
  ],
  "lastModified": "2026-08-04T11:16:39.007",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}