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CVE-2025-38208

Estado: AnalizadaMedia (5.5)—

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

smb: client: add NULL check in automount_fullpath

page is checked for null in __build_path_from_dentry_optional_prefix when tcon->origin_fullpath is not set. However, the check is missing when it is set. Add a check to prevent a potential NULL pointer dereference.

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).

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2025-38208",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "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": "d5a863a153e90996ab2aef6b9e08d509f4d5662b",
              "lessThan": "37166d63e42c34846a16001950ecec96229a8d17",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d5a863a153e90996ab2aef6b9e08d509f4d5662b",
              "lessThan": "a9e916fa5c7d0ec2256aa44aa24ddd92f529ce35",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d5a863a153e90996ab2aef6b9e08d509f4d5662b",
              "lessThan": "cce8e71ca1f7ad9045707f0d22490c1e9ed1df6c",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d5a863a153e90996ab2aef6b9e08d509f4d5662b",
              "lessThan": "f1e7a277a1736e12cc4bd6d93b8a5c439b8ca20c",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e91802036b3e6e6e803a17ddf5783a6354fe5380",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6.2.13",
              "lessThan": "6.3",
              "versionType": "semver"
            }
          ],
          "programFiles": [
            "fs/smb/client/namespace.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.3"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.3",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.6.95",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.35",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.15.4",
              "versionType": "semver",
              "lessThanOrEqual": "6.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.16",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "fs/smb/client/namespace.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-07-04T14:15:28.950",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/37166d63e42c34846a16001950ecec96229a8d17",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/a9e916fa5c7d0ec2256aa44aa24ddd92f529ce35",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/cce8e71ca1f7ad9045707f0d22490c1e9ed1df6c",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/f1e7a277a1736e12cc4bd6d93b8a5c439b8ca20c",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: add NULL check in automount_fullpath\n\npage is checked for null in __build_path_from_dentry_optional_prefix\nwhen tcon->origin_fullpath is not set. However, the check is missing when\nit is set.\nAdd a check to prevent a potential NULL pointer dereference."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: smb: cliente: Se comprueba si la comprobación de añadir NULL en la página automount_fullpath contiene valores nulos en __build_path_from_dentry_optional_prefix cuando tcon->origin_fullpath no está configurado. Sin embargo, la comprobación no se encuentra disponible cuando sí lo está. Se ha añadido una comprobación para evitar una posible desreferencia de punteros NULL."
    }
  ],
  "lastModified": "2026-06-17T09:16:23.467",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "866FF7CF-AE64-422E-8A7D-4CEF857AA4B7",
              "versionEndExcluding": "6.6.95"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E569FD34-0076-4428-BE17-EECCF867611C",
              "versionEndExcluding": "6.12.35",
              "versionStartIncluding": "6.7"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "DFD174C5-1AA2-4671-BDDC-1A9FCC753655",
              "versionEndExcluding": "6.15.4",
              "versionStartIncluding": "6.13"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}