FKIE_CVE-2024-56729

Vulnerability from fkie_nvd - Published: 2024-12-29 12:15 - Updated: 2025-10-01 20:17
Severity ?
4.7 (Medium) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
4.7 (Medium) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: smb: Initialize cfid->tcon before performing network ops Avoid leaking a tcon ref when a lease break races with opening the cached directory. Processing the leak break might take a reference to the tcon in cached_dir_lease_break() and then fail to release the ref in cached_dir_offload_close, since cfid->tcon is still NULL.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1b9ab6b648f89441c8a13cb3fd8ca83ffebc5262Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4b216c8f9c7d84ef7de33ca60b97e08e03ef3292Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/625e2357c8fcfae6e66dcc667dc656fe390bab15Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c353ee4fb119a2582d0e011f66a76a38f5cf984dPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "7081676E-4D8A-48BF-AAF4-73B8F49078AE",
              "versionEndExcluding": "6.6.64",
              "versionStartIncluding": "6.1",
              "vulnerable": true
            },
            {
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          "operator": "OR"
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: Initialize cfid-\u003etcon before performing network ops\n\nAvoid leaking a tcon ref when a lease break races with opening the\ncached directory. Processing the leak break might take a reference to\nthe tcon in cached_dir_lease_break() and then fail to release the ref in\ncached_dir_offload_close, since cfid-\u003etcon is still NULL."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: smb: inicializar cfid-\u0026gt;tcon antes de realizar operaciones de red Evitar la fuga de una referencia tcon cuando una interrupci\u00f3n de arrendamiento se ejecuta con la apertura del directorio en cach\u00e9. El procesamiento de la interrupci\u00f3n de la fuga puede tomar una referencia al tcon en cached_dir_lease_break() y luego no liberar la referencia en cached_dir_offload_close, ya que cfid-\u0026gt;tcon sigue siendo NULL."
    }
  ],
  "id": "CVE-2024-56729",
  "lastModified": "2025-10-01T20:17:45.740",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 4.7,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
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        "source": "nvd@nist.gov",
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          "attackVector": "LOCAL",
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          "baseScore": 4.7,
          "baseSeverity": "MEDIUM",
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          "integrityImpact": "NONE",
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          "scope": "UNCHANGED",
          "userInteraction": "NONE",
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  "published": "2024-12-29T12:15:07.023",
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      "tags": [
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  "vulnStatus": "Modified",
  "weaknesses": [
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          "lang": "en",
          "value": "CWE-401"
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      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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