fkie_cve-2024-44992
Vulnerability from fkie_nvd
Published
2024-09-04 20:15
Modified
2024-09-06 16:29
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: smb/client: avoid possible NULL dereference in cifs_free_subrequest() Clang static checker (scan-build) warning: cifsglob.h:line 890, column 3 Access to field 'ops' results in a dereference of a null pointer. Commit 519be989717c ("cifs: Add a tracepoint to track credits involved in R/W requests") adds a check for 'rdata->server', and let clang throw this warning about NULL dereference. When 'rdata->credits.value != 0 && rdata->server == NULL' happens, add_credits_and_wake_if() will call rdata->server->ops->add_credits(). This will cause NULL dereference problem. Add a check for 'rdata->server' to avoid NULL dereference.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/74c2ab6d653b4c2354df65a7f7f2df1925a40a51Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fead60a6d5f84b472b928502a42c419253afe6c1Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel 6.11
linux linux_kernel 6.11
linux linux_kernel 6.11


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "E55C1263-DF43-41EF-8DA8-2BA68DF4FFFD",
              "versionEndExcluding": "6.10.7",
              "versionStartIncluding": "6.10",
              "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/client: avoid possible NULL dereference in cifs_free_subrequest()\n\nClang static checker (scan-build) warning:\n\tcifsglob.h:line 890, column 3\n\tAccess to field \u0027ops\u0027 results in a dereference of a null pointer.\n\nCommit 519be989717c (\"cifs: Add a tracepoint to track credits involved in\nR/W requests\") adds a check for \u0027rdata-\u003eserver\u0027, and let clang throw this\nwarning about NULL dereference.\n\nWhen \u0027rdata-\u003ecredits.value != 0 \u0026\u0026 rdata-\u003eserver == NULL\u0027 happens,\nadd_credits_and_wake_if() will call rdata-\u003eserver-\u003eops-\u003eadd_credits().\nThis will cause NULL dereference problem. Add a check for \u0027rdata-\u003eserver\u0027\nto avoid NULL dereference."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: smb/client: evitar posible desreferencia NULL en cifs_free_subrequest() Advertencia del verificador est\u00e1tico de Clang (scan-build): cifsglob.h:l\u00ednea 890, columna 3 El acceso al campo \u0027ops\u0027 da como resultado una desreferencia de un puntero nulo. El commit 519be989717c (\"cifs: Agregar un punto de seguimiento para rastrear cr\u00e9ditos involucrados en solicitudes R/W\") agrega una verificaci\u00f3n para \u0027rdata-\u0026gt;server\u0027 y permite que clang lance esta advertencia sobre la desreferencia NULL. Cuando sucede \u0027rdata-\u0026gt;credits.value != 0 \u0026amp;\u0026amp; rdata-\u0026gt;server == NULL\u0027, add_credits_and_wake_if() llamar\u00e1 a rdata-\u0026gt;server-\u0026gt;ops-\u0026gt;add_credits(). Esto causar\u00e1 un problema de desreferencia NULL. Agregue una verificaci\u00f3n para \u0027rdata-\u0026gt;server\u0027 para evitar la desreferencia NULL."
    }
  ],
  "id": "CVE-2024-44992",
  "lastModified": "2024-09-06T16:29:28.963",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2024-09-04T20:15:08.207",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/74c2ab6d653b4c2354df65a7f7f2df1925a40a51"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/fead60a6d5f84b472b928502a42c419253afe6c1"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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