nvd-json-data-feeds/CVE-2022/CVE-2022-489xx/CVE-2022-48931.json

{
  "id": "CVE-2022-48931",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2024-08-22T04:15:16.010",
  "lastModified": "2024-08-23T01:54:11.640",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nconfigfs: fix a race in configfs_{,un}register_subsystem()\n\nWhen configfs_register_subsystem() or configfs_unregister_subsystem()\nis executing link_group() or unlink_group(),\nit is possible that two processes add or delete list concurrently.\nSome unfortunate interleavings of them can cause kernel panic.\n\nOne of cases is:\nA --> B --> C --> D\nA <-- B <-- C <-- D\n\n     delete list_head *B        |      delete list_head *C\n--------------------------------|-----------------------------------\nconfigfs_unregister_subsystem   |   configfs_unregister_subsystem\n  unlink_group                  |     unlink_group\n    unlink_obj                  |       unlink_obj\n      list_del_init             |         list_del_init\n        __list_del_entry        |           __list_del_entry\n          __list_del            |             __list_del\n            // next == C        |\n            next->prev = prev   |\n                                |               next->prev = prev\n            prev->next = next   |\n                                |                 // prev == B\n                                |                 prev->next = next\n\nFix this by adding mutex when calling link_group() or unlink_group(),\nbut parent configfs_subsystem is NULL when config_item is root.\nSo I create a mutex configfs_subsystem_mutex."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: configfs: arregla una ejecuci\u00f3n en configfs_{,un}register_subsystem() Cuando configfs_register_subsystem() o configfs_unregister_subsystem() est\u00e1 ejecutando link_group() o unlink_group(), es posible que dos procesos agregar o eliminar la lista al mismo tiempo. Algunas intercalaciones desafortunadas de ellos pueden causar p\u00e1nico en el kernel. Uno de los casos es: A --&gt; B --&gt; C --&gt; DA &lt;-- B &lt;-- C &lt;-- D eliminar list_head *B | eliminar list_head *C --------------------------------|------------- ---------------------- configfs_unregister_subsystem | configfs_unregister_subsystem unlink_group | desvincular_grupo desvincular_obj | unlink_obj list_del_init | list_del_init __list_del_entry | __list_del_entry __list_del | __list_del // siguiente == C | siguiente-&gt;anterior = anterior | | siguiente-&gt;anterior = anterior anterior-&gt;siguiente = siguiente | | // anterior == B | prev-&gt;next = next Solucione esto agregando mutex al llamar a link_group() o unlink_group(), pero el configfs_subsystem principal es NULL cuando config_item es root. Entonces creo un mutex configfs_subsystem_mutex."
    }
  ],
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      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "baseScore": 4.7,
          "baseSeverity": "MEDIUM",
          "attackVector": "LOCAL",
          "attackComplexity": "HIGH",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.0,
        "impactScore": 3.6
      }
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      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
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          "lang": "en",
          "value": "CWE-362"
        }
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