fkie_cve-2021-47153
Vulnerability from fkie_nvd
Published
2024-03-25 09:15
Modified
2025-09-16 16:24
Severity ?
7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
6.0 (Medium) - CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: i2c: i801: Don't generate an interrupt on bus reset Now that the i2c-i801 driver supports interrupts, setting the KILL bit in a attempt to recover from a timed out transaction triggers an interrupt. Unfortunately, the interrupt handler (i801_isr) is not prepared for this situation and will try to process the interrupt as if it was signaling the end of a successful transaction. In the case of a block transaction, this can result in an out-of-range memory access. This condition was reproduced several times by 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=b4d3fd1dfd53e90afd79 So disable interrupts while trying to reset the bus. Interrupts will be enabled again for the following transaction.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/04cc05e3716ae31b17ecdab7bc55c8170def1b8bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/09c9e79f4c10cfb6b9e0e1b4dd355232e4b5a3b3Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1f583d3813f204449037cd2acbfc09168171362aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b523feb7e8e44652f92f3babb953a976e7ccbbefPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c70e1ba2e7e65255a0ce004f531dd90dada97a8cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dfa8929e117b0228a7765f5c3f5988a4a028f3c6Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e4d8716c3dcec47f1557024add24e1f3c09eb24bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f9469082126cebb7337db3992d143f5e4edfe629Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/04cc05e3716ae31b17ecdab7bc55c8170def1b8bPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/09c9e79f4c10cfb6b9e0e1b4dd355232e4b5a3b3Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/1f583d3813f204449037cd2acbfc09168171362aPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b523feb7e8e44652f92f3babb953a976e7ccbbefPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/c70e1ba2e7e65255a0ce004f531dd90dada97a8cPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/dfa8929e117b0228a7765f5c3f5988a4a028f3c6Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/e4d8716c3dcec47f1557024add24e1f3c09eb24bPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f9469082126cebb7337db3992d143f5e4edfe629Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 5.13
linux linux_kernel 5.13
linux linux_kernel 5.13


To clipboard 

{
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ni2c: i801: Don\u0027t 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."
    }
  ],
  "id": "CVE-2021-47153",
  "lastModified": "2025-09-16T16:24:46.947",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
          "version": "3.1"
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        "impactScore": 5.2,
        "source": "nvd@nist.gov",
        "type": "Primary"
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          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 6.0,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H",
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
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  "published": "2024-03-25T09:15:09.407",
  "references": [
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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          "lang": "en",
          "value": "CWE-125"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
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}


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