FKIE_CVE-2024-38575

Vulnerability from fkie_nvd - Published: 2024-06-19 14:15 - Updated: 2025-01-31 16:01
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: wifi: brcmfmac: pcie: handle randbuf allocation failure The kzalloc() in brcmf_pcie_download_fw_nvram() will return null if the physical memory has run out. As a result, if we use get_random_bytes() to generate random bytes in the randbuf, the null pointer dereference bug will happen. In order to prevent allocation failure, this patch adds a separate function using buffer on kernel stack to generate random bytes in the randbuf, which could prevent the kernel stack from overflow.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0eb2c0528e232b3c32cde9d5e1c9f80ba2996e49Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/316f790ebcf94bdf59f794b7cdea4068dc676d4cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3729ca9e48d19a03ae049e2bde510e161c2f3720Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7c15eb344b0d4d3468c9b2a7591ad2b859b29b88Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c37466406f075476c2702ecc01917928af871f3bPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/0eb2c0528e232b3c32cde9d5e1c9f80ba2996e49Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/316f790ebcf94bdf59f794b7cdea4068dc676d4cPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/3729ca9e48d19a03ae049e2bde510e161c2f3720Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/7c15eb344b0d4d3468c9b2a7591ad2b859b29b88Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/c37466406f075476c2702ecc01917928af871f3bPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
To clipboard 

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  "configurations": [
    {
      "nodes": [
        {
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: brcmfmac: pcie: handle randbuf allocation failure\n\nThe kzalloc() in brcmf_pcie_download_fw_nvram() will return null\nif the physical memory has run out. As a result, if we use\nget_random_bytes() to generate random bytes in the randbuf, the\nnull pointer dereference bug will happen.\n\nIn order to prevent allocation failure, this patch adds a separate\nfunction using buffer on kernel stack to generate random bytes in\nthe randbuf, which could prevent the kernel stack from overflow."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: wifi: brcmfmac: pcie: manejar fallo de asignaci\u00f3n de randbuf El kzalloc() en brcmf_pcie_download_fw_nvram() devolver\u00e1 nulo si la memoria f\u00edsica se ha agotado. Como resultado, si usamos get_random_bytes() para generar bytes aleatorios en randbuf, se producir\u00e1 el error de desreferencia del puntero nulo. Para evitar fallas en la asignaci\u00f3n, este parche agrega una funci\u00f3n separada que utiliza el b\u00fafer en la pila del kernel para generar bytes aleatorios en randbuf, lo que podr\u00eda evitar que la pila del kernel se desborde."
    }
  ],
  "id": "CVE-2024-38575",
  "lastModified": "2025-01-31T16:01:08.540",
  "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"
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  "published": "2024-06-19T14:15:17.603",
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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