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CVE-2024-36476

Estado: ModificadaMedia (5.5)—

In the Linux kernel, the following vulnerability has been resolved:

RDMA/rtrs: Ensure 'ib_sge list' is accessible

Move the declaration of the 'ib_sge list' variable outside the 'always_invalidate' block to ensure it remains accessible for use throughout the function.

This change ensures the variable is available for subsequent operations that require it.

[1] https://lore.kernel.org/linux-rdma/6a1f3e8f-deb0-49f9-bc69-a9b03ecfcda7@fujitsu.com/

Detalles técnicos trazas, registros y código del informe original
Previously, 'ib_sge list' was declared within the 'always_invalidate'
block, limiting its accessibility, then caused a
'BUG: kernel NULL pointer dereference'[1].
 ? __die_body.cold+0x19/0x27
 ? page_fault_oops+0x15a/0x2d0
 ? search_module_extables+0x19/0x60
 ? search_bpf_extables+0x5f/0x80
 ? exc_page_fault+0x7e/0x180
 ? asm_exc_page_fault+0x26/0x30
 ? memcpy_orig+0xd5/0x140
 rxe_mr_copy+0x1c3/0x200 [rdma_rxe]
 ? rxe_pool_get_index+0x4b/0x80 [rdma_rxe]
 copy_data+0xa5/0x230 [rdma_rxe]
 rxe_requester+0xd9b/0xf70 [rdma_rxe]
 ? finish_task_switch.isra.0+0x99/0x2e0
 rxe_sender+0x13/0x40 [rdma_rxe]
 do_task+0x68/0x1e0 [rdma_rxe]
 process_one_work+0x177/0x330
 worker_thread+0x252/0x390
 ? __pfx_worker_thread+0x10/0x10

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

Mostrar
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  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/rtrs: Ensure 'ib_sge list' is accessible\n\nMove the declaration of the 'ib_sge list' variable outside the\n'always_invalidate' block to ensure it remains accessible for use\nthroughout the function.\n\nPreviously, 'ib_sge list' was declared within the 'always_invalidate'\nblock, limiting its accessibility, then caused a\n'BUG: kernel NULL pointer dereference'[1].\n ? __die_body.cold+0x19/0x27\n ? page_fault_oops+0x15a/0x2d0\n ? search_module_extables+0x19/0x60\n ? search_bpf_extables+0x5f/0x80\n ? exc_page_fault+0x7e/0x180\n ? asm_exc_page_fault+0x26/0x30\n ? memcpy_orig+0xd5/0x140\n rxe_mr_copy+0x1c3/0x200 [rdma_rxe]\n ? rxe_pool_get_index+0x4b/0x80 [rdma_rxe]\n copy_data+0xa5/0x230 [rdma_rxe]\n rxe_requester+0xd9b/0xf70 [rdma_rxe]\n ? finish_task_switch.isra.0+0x99/0x2e0\n rxe_sender+0x13/0x40 [rdma_rxe]\n do_task+0x68/0x1e0 [rdma_rxe]\n process_one_work+0x177/0x330\n worker_thread+0x252/0x390\n ? __pfx_worker_thread+0x10/0x10\n\nThis change ensures the variable is available for subsequent operations\nthat require it.\n\n[1] https://lore.kernel.org/linux-rdma/6a1f3e8f-deb0-49f9-bc69-a9b03ecfcda7@fujitsu.com/"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: RDMA/rtrs: garantizar que 'ib_sge list' sea accesible Mueva la declaración de la variable 'ib_sge list' fuera del bloque 'always_invalidate' para garantizar que permanezca accesible para su uso en toda la función. Anteriormente, 'ib_sge list' se declaraba dentro del bloque 'always_invalidate', lo que limitaba su accesibilidad y luego causaba un 'BUG: kernel NULL pointer dereference'[1]. ? __die_body.cold+0x19/0x27 ? page_fault_oops+0x15a/0x2d0 ? search_module_extables+0x19/0x60 ? search_bpf_extables+0x5f/0x80 ? exc_page_fault+0x7e/0x180 ? asm_exc_page_fault+0x26/0x30 ? rxe_pool_get_index+0x4b/0x80 [rdma_rxe] copy_data+0xa5/0x230 [rdma_rxe] rxe_requester+0xd9b/0xf70 [rdma_rxe] ? finish_task_switch.isra.0+0x99/0x2e0 rxe_sender+0x13/0x40 [rdma_rxe] do_task+0x68/0x1e0 [rdma_rxe] process_one_work+0x177/0x330 worker_thread+0x252/0x390 ? __pfx_worker_thread+0x10/0x10 Este cambio garantiza que la variable esté disponible para operaciones posteriores que la requieran. [1] https://lore.kernel.org/linux-rdma/6a1f3e8f-deb0-49f9-bc69-a9b03ecfcda7@fujitsu.com/"
    }
  ],
  "lastModified": "2026-08-04T11:18:25.513",
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      "nodes": [
        {
          "negate": false,
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}