nvd-json-data-feeds/CVE-2024/CVE-2024-395xx/CVE-2024-39508.json

{
  "id": "CVE-2024-39508",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2024-07-12T13:15:13.130",
  "lastModified": "2024-11-21T09:27:52.240",
  "vulnStatus": "Awaiting Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/io-wq: Use set_bit() and test_bit() at worker->flags\n\nUtilize set_bit() and test_bit() on worker->flags within io_uring/io-wq\nto address potential data races.\n\nThe structure io_worker->flags may be accessed through various data\npaths, leading to concurrency issues. When KCSAN is enabled, it reveals\ndata races occurring in io_worker_handle_work and\nio_wq_activate_free_worker functions.\n\n\t BUG: KCSAN: data-race in io_worker_handle_work / io_wq_activate_free_worker\n\t write to 0xffff8885c4246404 of 4 bytes by task 49071 on cpu 28:\n\t io_worker_handle_work (io_uring/io-wq.c:434 io_uring/io-wq.c:569)\n\t io_wq_worker (io_uring/io-wq.c:?)\n<snip>\n\n\t read to 0xffff8885c4246404 of 4 bytes by task 49024 on cpu 5:\n\t io_wq_activate_free_worker (io_uring/io-wq.c:? io_uring/io-wq.c:285)\n\t io_wq_enqueue (io_uring/io-wq.c:947)\n\t io_queue_iowq (io_uring/io_uring.c:524)\n\t io_req_task_submit (io_uring/io_uring.c:1511)\n\t io_handle_tw_list (io_uring/io_uring.c:1198)\n<snip>\n\nLine numbers against commit 18daea77cca6 (\"Merge tag 'for-linus' of\ngit://git.kernel.org/pub/scm/virt/kvm/kvm\").\n\nThese races involve writes and reads to the same memory location by\ndifferent tasks running on different CPUs. To mitigate this, refactor\nthe code to use atomic operations such as set_bit(), test_bit(), and\nclear_bit() instead of basic \"and\" and \"or\" operations. This ensures\nthread-safe manipulation of worker flags.\n\nAlso, move `create_index` to avoid holes in the structure."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: io_uring/io-wq: use set_bit() y test_bit() en trabajador-&gt;flags Utilice set_bit() y test_bit() en trabajador-&gt;flags dentro de io_uring/io-wq para abordar posibles ejecuci\u00f3ns de datos. Se puede acceder a la estructura io_worker-&gt;flags a trav\u00e9s de varias rutas de datos, lo que genera problemas de concurrencia. Cuando KCSAN est\u00e1 habilitado, revela ejecuci\u00f3ns de datos que ocurren en las funciones io_worker_handle_work y io_wq_activate_free_worker. ERROR: KCSAN: ejecuci\u00f3n de datos en io_worker_handle_work/io_wq_activate_free_worker escribe en 0xffff8885c4246404 de 4 bytes por tarea 49071 en la CPU 28: io_worker_handle_work (io_uring/io-wq.c:434 io_uring/io-wq.c:569) (io_durante/io -wq.c:?)  leer en 0xffff8885c4246404 de 4 bytes por tarea 49024 en la CPU 5: io_wq_activate_free_worker (io_uring/io-wq.c:? io_uring/io-wq.c:285) io_wq_enqueue (io_uring/io- wq.c:947) io_queue_iowq (io_uring/io_uring.c:524) io_req_task_submit (io_uring/io_uring.c:1511) io_handle_tw_list (io_uring/io_uring.c:1198)  N\u00fameros de l\u00ednea contra El commit 18daea77cca6 (\"Etiqueta de combinaci\u00f3n 'para -linus' de git://git.kernel.org/pub/scm/virt/kvm/kvm\"). Estas ejecuciones implican escrituras y lecturas en la misma ubicaci\u00f3n de memoria mediante diferentes tareas que se ejecutan en diferentes CPU. Para mitigar esto, refactorice el c\u00f3digo para usar operaciones at\u00f3micas como set_bit(), test_bit() y clear_bit() en lugar de operaciones b\u00e1sicas \"y\" y \"o\". Esto garantiza una manipulaci\u00f3n segura para subprocesos de los indicadores de los trabajadores. Adem\u00e1s, mueva `create_index` para evitar agujeros en la estructura."
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/1cbb0affb15470a9621267fe0a8568007553a4bf",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/8a565304927fbd28c9f028c492b5c1714002cbab",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ab702c3483db9046bab9f40306f1a28b22dbbdc0",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/1cbb0affb15470a9621267fe0a8568007553a4bf",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://git.kernel.org/stable/c/8a565304927fbd28c9f028c492b5c1714002cbab",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://git.kernel.org/stable/c/ab702c3483db9046bab9f40306f1a28b22dbbdc0",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ]
}