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CVE-2022-49938

Estado: AnalizadaMedia (5.5)—

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

cifs: fix small mempool leak in SMB2_negotiate()

In some cases of failure (dialect mismatches) in SMB2_negotiate(), after the request is sent, the checks would return -EIO when they should be rather setting rc = -EIO and jumping to neg_exit to free the response buffer from mempool.

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-2022-49938",
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        "source": "nvd@nist.gov",
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          "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"
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        "impactScore": 3.6,
        "exploitabilityScore": 1.8
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          "programFiles": [
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  "published": "2025-06-18T11:15:20.683",
  "references": [
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      "url": "https://git.kernel.org/stable/c/27893dfc1285f80f80f46b3b8c95f5d15d2e66d0",
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "source": "nvd@nist.gov",
      "description": [
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          "lang": "en",
          "value": "CWE-401"
        }
      ]
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  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: fix small mempool leak in SMB2_negotiate()\n\nIn some cases of failure (dialect mismatches) in SMB2_negotiate(), after\nthe request is sent, the checks would return -EIO when they should be\nrather setting rc = -EIO and jumping to neg_exit to free the response\nbuffer from mempool."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: cifs: corrige una pequeña pérdida de mempool en SMB2_negotiate() En algunos casos de falla (desajustes de dialecto) en SMB2_negotiate(), después de enviar la solicitud, las verificaciones devolverían -EIO cuando deberían establecer rc = -EIO y saltar a neg_exit para liberar el búfer de respuesta de mempool."
    }
  ],
  "lastModified": "2026-06-17T05:19:34.737",
  "configurations": [
    {
      "nodes": [
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          "negate": false,
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