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CVE-2025-40103

Estado: AplazadaSin puntuar—

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

smb: client: Fix refcount leak for cifs_sb_tlink

Fix three refcount inconsistency issues related to `cifs_sb_tlink`.

Comments for `cifs_sb_tlink` state that `cifs_put_tlink()` needs to be called after successful calls to `cifs_sb_tlink()`. Three calls fail to update refcount accordingly, leading to possible resource leaks.

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

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)

⚠ 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-2025-40103",
  "cveTags": [],
  "metrics": {},
  "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": "8ceb984379462f94bdebef3288d569c6e1f912ea",
              "lessThan": "d3c8ea197055c260119a13360e8202a27e53e1e4",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "8ceb984379462f94bdebef3288d569c6e1f912ea",
              "lessThan": "790282abe9d805f08618c1c24ea2529e7259b692",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "8ceb984379462f94bdebef3288d569c6e1f912ea",
              "lessThan": "d7dd034c14928306db1b46be277ae439b84dacf9",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "8ceb984379462f94bdebef3288d569c6e1f912ea",
              "lessThan": "e15605b68b490186da2ad8029c0351a9cfb0b9af",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "8ceb984379462f94bdebef3288d569c6e1f912ea",
              "lessThan": "896bb31e1416f582503db1350cf1bd10dc64e5a6",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "8ceb984379462f94bdebef3288d569c6e1f912ea",
              "lessThan": "c2b77f42205ef485a647f62082c442c1cd69d3fc",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "fs/smb/client/inode.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": "3.7"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "3.7",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.15.203",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.158",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.114",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.55",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.17.5",
              "versionType": "semver",
              "lessThanOrEqual": "6.17.*"
            },
            {
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "fs/smb/client/inode.c",
            "fs/smb/client/smb2ops.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-10-30T10:15:34.693",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/790282abe9d805f08618c1c24ea2529e7259b692",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/896bb31e1416f582503db1350cf1bd10dc64e5a6",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/c2b77f42205ef485a647f62082c442c1cd69d3fc",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d3c8ea197055c260119a13360e8202a27e53e1e4",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d7dd034c14928306db1b46be277ae439b84dacf9",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e15605b68b490186da2ad8029c0351a9cfb0b9af",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Deferred",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: Fix refcount leak for cifs_sb_tlink\n\nFix three refcount inconsistency issues related to `cifs_sb_tlink`.\n\nComments for `cifs_sb_tlink` state that `cifs_put_tlink()` needs to be\ncalled after successful calls to `cifs_sb_tlink()`. Three calls fail to\nupdate refcount accordingly, leading to possible resource leaks."
    }
  ],
  "lastModified": "2026-06-17T09:21:16.167",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}