{
  "id": "CVE-2024-40966",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2024-07-12T13:15:18.420",
  "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\ntty: add the option to have a tty reject a new ldisc\n\n... and use it to limit the virtual terminals to just N_TTY.  They are\nkind of special, and in particular, the \"con_write()\" routine violates\nthe \"writes cannot sleep\" rule that some ldiscs rely on.\n\nThis avoids the\n\n   BUG: sleeping function called from invalid context at kernel/printk/printk.c:2659\n\nwhen N_GSM has been attached to a virtual console, and gsmld_write()\ncalls con_write() while holding a spinlock, and con_write() then tries\nto get the console lock."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: tty: agregue la opci\u00f3n para que un tty rechace un nuevo ldisc... y util\u00edcelo para limitar las terminales virtuales a solo N_TTY. Son algo especiales y, en particular, la rutina \"con_write()\" viola la regla \"las escrituras no pueden dormir\" en la que se basan algunos ldiscs. Esto evita el ERROR: funci\u00f3n de suspensi\u00f3n llamada desde un contexto no v\u00e1lido en kernel/printk/printk.c:2659 cuando N_GSM se ha conectado a una consola virtual, y gsmld_write() llama a con_write() mientras mantiene un spinlock, y con_write() luego intenta para obtener el bloqueo de la consola."
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/287b569a5b914903ba7c438a3c0dbc3410ebb409",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/3c6332f3bb1578b5b10ac2561247b1d6272ae937",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/5920ac19964f9e20181f63b410d9200ddbf8dc86",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6bd23e0c2bb6c65d4f5754d1456bc9a4427fc59b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}