{
  "id": "CVE-2024-26871",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2024-04-17T11:15:09.513",
  "lastModified": "2024-04-17T12:48:07.510",
  "vulnStatus": "Awaiting Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix NULL pointer dereference in f2fs_submit_page_write()\n\nBUG: kernel NULL pointer dereference, address: 0000000000000014\nRIP: 0010:f2fs_submit_page_write+0x6cf/0x780 [f2fs]\nCall Trace:\n<TASK>\n? show_regs+0x6e/0x80\n? __die+0x29/0x70\n? page_fault_oops+0x154/0x4a0\n? prb_read_valid+0x20/0x30\n? __irq_work_queue_local+0x39/0xd0\n? irq_work_queue+0x36/0x70\n? do_user_addr_fault+0x314/0x6c0\n? exc_page_fault+0x7d/0x190\n? asm_exc_page_fault+0x2b/0x30\n? f2fs_submit_page_write+0x6cf/0x780 [f2fs]\n? f2fs_submit_page_write+0x736/0x780 [f2fs]\ndo_write_page+0x50/0x170 [f2fs]\nf2fs_outplace_write_data+0x61/0xb0 [f2fs]\nf2fs_do_write_data_page+0x3f8/0x660 [f2fs]\nf2fs_write_single_data_page+0x5bb/0x7a0 [f2fs]\nf2fs_write_cache_pages+0x3da/0xbe0 [f2fs]\n...\nIt is possible that other threads have added this fio to io->bio\nand submitted the io->bio before entering f2fs_submit_page_write().\nAt this point io->bio = NULL.\nIf is_end_zone_blkaddr(sbi, fio->new_blkaddr) of this fio is true,\nthen an NULL pointer dereference error occurs at bio_get(io->bio).\nThe original code for determining zone end was after \"out:\",\nwhich would have missed some fio who is zone end. I've moved\n this code before \"skip:\" to make sure it's done for each fio."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: f2fs: corrige la desreferencia del puntero NULL en f2fs_submit_page_write() ERROR: desreferencia del puntero NULL del kernel, direcci\u00f3n: 0000000000000014 RIP: 0010:f2fs_submit_page_write+0x6cf/0x780 [f2fs] Seguimiento de llamadas:  ? show_regs+0x6e/0x80? __morir+0x29/0x70 ? page_fault_oops+0x154/0x4a0? prb_read_valid+0x20/0x30? __irq_work_queue_local+0x39/0xd0 ? irq_work_queue+0x36/0x70? do_user_addr_fault+0x314/0x6c0? exc_page_fault+0x7d/0x190? asm_exc_page_fault+0x2b/0x30? f2fs_submit_page_write+0x6cf/0x780 [f2fs] ? f2fs_submit_page_write+0x736/0x780 [f2fs] do_write_page+0x50/0x170 [f2fs] f2fs_outplace_write_data+0x61/0xb0 [f2fs] f2fs_do_write_data_page+0x3f8/0x660 [f2fs] f2fs_write_single_data_page+0 x5bb/0x7a0 [f2fs] f2fs_write_cache_pages+0x3da/0xbe0 [f2fs] .. Es posible que otros hilos hayan agregado este fio a io-&gt;bio y hayan enviado el io-&gt;bio antes de ingresar a f2fs_submit_page_write(). En este punto io-&gt;bio = NULL. Si is_end_zone_blkaddr(sbi, fio-&gt;new_blkaddr) de este fio es verdadero, entonces se produce un error de desreferencia de puntero NULL en bio_get(io-&gt;bio). El c\u00f3digo original para determinar el final de la zona estaba despu\u00e9s de \"out:\", lo que habr\u00eda pasado por alto a alg\u00fan fio que es el final de la zona. Mov\u00ed este c\u00f3digo antes de \"omitir:\" para asegurarme de que est\u00e9 hecho para cada fio."
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/4c122a32582b67bdd44ca8d25f894ee2dc54f566",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6d102382a11d5e6035f6c98f6e508a38541f7af3",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/8e2ea8b04cb8d976110c4568509e67d6a39b2889",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/c2034ef6192a65a986a45c2aa2ed05824fdc0e9f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}