{
  "id": "CVE-2021-47153",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2024-03-25T09:15:09.407",
  "lastModified": "2024-03-25T13:47:14.087",
  "vulnStatus": "Awaiting Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ni2c: i801: Don't generate an interrupt on bus reset\n\nNow that the i2c-i801 driver supports interrupts, setting the KILL bit\nin a attempt to recover from a timed out transaction triggers an\ninterrupt. Unfortunately, the interrupt handler (i801_isr) is not\nprepared for this situation and will try to process the interrupt as\nif it was signaling the end of a successful transaction. In the case\nof a block transaction, this can result in an out-of-range memory\naccess.\n\nThis condition was reproduced several times by syzbot:\nhttps://syzkaller.appspot.com/bug?extid=ed71512d469895b5b34e\nhttps://syzkaller.appspot.com/bug?extid=8c8dedc0ba9e03f6c79e\nhttps://syzkaller.appspot.com/bug?extid=c8ff0b6d6c73d81b610e\nhttps://syzkaller.appspot.com/bug?extid=33f6c360821c399d69eb\nhttps://syzkaller.appspot.com/bug?extid=be15dc0b1933f04b043a\nhttps://syzkaller.appspot.com/bug?extid=b4d3fd1dfd53e90afd79\n\nSo disable interrupts while trying to reset the bus. Interrupts will\nbe enabled again for the following transaction."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: i2c: i801: no genera una interrupci\u00f3n al restablecer el bus Ahora que el controlador i2c-i801 admite interrupciones, configurar el bit KILL en un intento de recuperarse de una transacci\u00f3n con tiempo de espera agotado se activa una interrupci\u00f3n. Desafortunadamente, el controlador de interrupciones (i801_isr) no est\u00e1 preparado para esta situaci\u00f3n e intentar\u00e1 procesar la interrupci\u00f3n como si estuviera indicando el final de una transacci\u00f3n exitosa. En el caso de una transacci\u00f3n en bloque, esto puede resultar en un acceso a la memoria fuera de rango. Esta condici\u00f3n fue reproducida varias veces por syzbot: https://syzkaller.appspot.com/bug?extid=ed71512d469895b5b34e https://syzkaller.appspot.com/bug?extid=8c8dedc0ba9e03f6c79e https://syzkaller.appspot.com/bug ?extid=c8ff0b6d6c73d81b610e https://syzkaller.appspot.com/bug?extid=33f6c360821c399d69eb https://syzkaller.appspot.com/bug?extid=be15dc0b1933f04b043a https://syzkaller.appspot.com/bug?extid=b 4d3fd1dfd53e90afd79 Entonces deshabilite las interrupciones al intentar restablecer el bus. Las interrupciones se habilitar\u00e1n nuevamente para la siguiente transacci\u00f3n."
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/04cc05e3716ae31b17ecdab7bc55c8170def1b8b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/09c9e79f4c10cfb6b9e0e1b4dd355232e4b5a3b3",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/1f583d3813f204449037cd2acbfc09168171362a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b523feb7e8e44652f92f3babb953a976e7ccbbef",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/c70e1ba2e7e65255a0ce004f531dd90dada97a8c",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/dfa8929e117b0228a7765f5c3f5988a4a028f3c6",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e4d8716c3dcec47f1557024add24e1f3c09eb24b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/f9469082126cebb7337db3992d143f5e4edfe629",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}