nvd-json-data-feeds/CVE-2024/CVE-2024-409xx/CVE-2024-40900.json

{
  "id": "CVE-2024-40900",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2024-07-12T13:15:13.433",
  "lastModified": "2024-07-12T16:34:58.687",
  "vulnStatus": "Awaiting Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncachefiles: remove requests from xarray during flushing requests\n\nEven with CACHEFILES_DEAD set, we can still read the requests, so in the\nfollowing concurrency the request may be used after it has been freed:\n\n     mount  |   daemon_thread1    |    daemon_thread2\n------------------------------------------------------------\n cachefiles_ondemand_init_object\n  cachefiles_ondemand_send_req\n   REQ_A = kzalloc(sizeof(*req) + data_len)\n   wait_for_completion(&REQ_A->done)\n            cachefiles_daemon_read\n             cachefiles_ondemand_daemon_read\n                                  // close dev fd\n                                  cachefiles_flush_reqs\n                                   complete(&REQ_A->done)\n   kfree(REQ_A)\n              xa_lock(&cache->reqs);\n              cachefiles_ondemand_select_req\n                req->msg.opcode != CACHEFILES_OP_READ\n                // req use-after-free !!!\n              xa_unlock(&cache->reqs);\n                                   xa_destroy(&cache->reqs)\n\nHence remove requests from cache->reqs when flushing them to avoid\naccessing freed requests."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: cachefiles: elimina solicitudes de xarray durante las solicitudes de vaciado Incluso con CACHEFILES_DEAD configurado, a\u00fan podemos leer las solicitudes, por lo que en la siguiente concurrencia la solicitud se puede usar despu\u00e9s de que se haya liberado: mount | daemon_thread1 | daemon_thread2 ------------------------------------------------- --------- Cachefiles_ondemand_init_object Cachefiles_ondemand_send_req req_a = kzalloc (sizeof (*req) + data_len) Wait_for_completion (& req_a-> ded) gratis (req_a ) xa_lock(&cache->reqs); cachefiles_ondemand_select_req req->msg.opcode != CACHEFILES_OP_READ // \u00a1\u00a1\u00a1requiere use-after-free !!! xa_unlock(&cache->reqs); xa_destroy(&cache->reqs) Por lo tanto, elimine las solicitudes de cache->reqs cuando las vac\u00ede para evitar acceder a las solicitudes liberadas."
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/0fc75c5940fa634d84e64c93bfc388e1274ed013",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/37e19cf86a520d65de1de9cb330415c332a40d19",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/50d0e55356ba5b84ffb51c42704126124257e598",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/9f13aacdd4ee9a7644b2a3c96d67113cd083c9c7",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}