FKIE_CVE-2022-48933

Vulnerability from fkie_nvd - Published: 2024-08-22 04:15 - Updated: 2024-08-23 01:50
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: netfilter: nf_tables: fix memory leak during stateful obj update stateful objects can be updated from the control plane. The transaction logic allocates a temporary object for this purpose. The ->init function was called for this object, so plain kfree() leaks resources. We must call ->destroy function of the object. nft_obj_destroy does this, but it also decrements the module refcount, but the update path doesn't increment it. To avoid special-casing the update object release, do module_get for the update case too and release it via nft_obj_destroy().
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/34bb90e407e3288f610558beaae54ecaa32b11c4Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/53026346a94c43f35c32b18804041bc483271d87Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7e9880e81d3fd6a43c202f205717485290432826Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dad3bdeef45f81a6e90204bcc85360bb76eccec7Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e96e204ee6fa46702f6c94c3c69a09e69e0eac52Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
To clipboard 

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  "descriptions": [
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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_tables: fix memory leak during stateful obj update\n\nstateful objects can be updated from the control plane.\nThe transaction logic allocates a temporary object for this purpose.\n\nThe -\u003einit function was called for this object, so plain kfree() leaks\nresources. We must call -\u003edestroy function of the object.\n\nnft_obj_destroy does this, but it also decrements the module refcount,\nbut the update path doesn\u0027t increment it.\n\nTo avoid special-casing the update object release, do module_get for\nthe update case too and release it via nft_obj_destroy()."
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      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfilter: nf_tables: corrige la p\u00e9rdida de memoria durante la actualizaci\u00f3n de objetos con estado. Los objetos con estado se pueden actualizar desde el plano de control. La l\u00f3gica de transacci\u00f3n asigna un objeto temporal para este prop\u00f3sito. La funci\u00f3n -\u0026gt;init fue llamada para este objeto, por lo que kfree() simple pierde recursos. Debemos llamar a la funci\u00f3n -\u0026gt;destruir del objeto. nft_obj_destroy hace esto, pero tambi\u00e9n disminuye el recuento del m\u00f3dulo, pero la ruta de actualizaci\u00f3n no lo incrementa. Para evitar usar may\u00fasculas y min\u00fasculas especiales en la versi\u00f3n del objeto de actualizaci\u00f3n, utilice module_get para el caso de actualizaci\u00f3n tambi\u00e9n y lib\u00e9rela mediante nft_obj_destroy()."
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  "id": "CVE-2022-48933",
  "lastModified": "2024-08-23T01:50:09.313",
  "metrics": {
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          "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",
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}


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