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CVE-2022-49822

Estado: ModificadaMedia (5.5)—

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

cifs: Fix connections leak when tlink setup failed

If the tlink setup failed, lost to put the connections, then the module refcnt leak since the cifsd kthread not exit.

Also leak the fscache info, and for next mount with fsc, it will print the follow errors: CIFS: Cache volume key already in use (cifs,127.0.0.1:445,TEST)

Let's check the result of tlink setup, and do some cleanup.

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-2022-49822",
  "cveTags": [],
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          "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",
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          ],
          "programFiles": [
            "fs/cifs/connect.c"
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          "defaultStatus": "affected"
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  ],
  "published": "2025-05-01T15:16:05.623",
  "references": [
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      "url": "https://git.kernel.org/stable/c/0a087842d10b5daa123ee5291e386cdd78413705",
      "tags": [
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-401"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: Fix connections leak when tlink setup failed\n\nIf the tlink setup failed, lost to put the connections, then\nthe module refcnt leak since the cifsd kthread not exit.\n\nAlso leak the fscache info, and for next mount with fsc, it will\nprint the follow errors:\n  CIFS: Cache volume key already in use (cifs,127.0.0.1:445,TEST)\n\nLet's check the result of tlink setup, and do some cleanup."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: cifs: Se corrige la fuga de conexiones al fallar la configuración de Tlink. Si la configuración de Tlink falla, se pierden las conexiones y se produce una fuga de referencia del módulo, ya que el kthread de cifsd no finaliza. También se filtra la información de fscache, y en el siguiente montaje con fsc, se mostrarán los siguientes errores: CIFS: La clave del volumen de caché ya está en uso (cifs,127.0.0.1:445,TEST). Revisemos el resultado de la configuración de Tlink y realicemos una limpieza."
    }
  ],
  "lastModified": "2026-06-17T05:19:13.877",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
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