fkie_cve-2022-48732
Vulnerability from fkie_nvd
Published
2024-06-20 12:15
Modified
2024-11-21 07:33
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/nouveau: fix off by one in BIOS boundary checking Bounds checking when parsing init scripts embedded in the BIOS reject access to the last byte. This causes driver initialization to fail on Apple eMac's with GeForce 2 MX GPUs, leaving the system with no working console. This is probably only seen on OpenFirmware machines like PowerPC Macs because the BIOS image provided by OF is only the used parts of the ROM, not a power-of-two blocks read from PCI directly so PCs always have empty bytes at the end that are never accessed.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1b777d4d9e383d2744fc9b3a09af6ec1893c8b1aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/909d3ec1bf9f0ec534bfc081b77c0836fea7b0e2Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/acc887ba88333f5fec49631f12d8cc7ebd95781cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b2a21669ee98aafc41c6d42ef15af4dab9e6e882Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d4b746e60fd8eaa8016e144223abe91158edcdadPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d877e814a62b7de9069aeff8bc1d979dfc996e06Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e7c36fa8a1e63b08312162179c78a0c7795ea369Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f071d9fa857582d7bd77f4906691f73d3edeab73Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/1b777d4d9e383d2744fc9b3a09af6ec1893c8b1aPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/909d3ec1bf9f0ec534bfc081b77c0836fea7b0e2Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/acc887ba88333f5fec49631f12d8cc7ebd95781cPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b2a21669ee98aafc41c6d42ef15af4dab9e6e882Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/d4b746e60fd8eaa8016e144223abe91158edcdadPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/d877e814a62b7de9069aeff8bc1d979dfc996e06Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/e7c36fa8a1e63b08312162179c78a0c7795ea369Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f071d9fa857582d7bd77f4906691f73d3edeab73Patch
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 *


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
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          "operator": "OR"
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/nouveau: fix off by one in BIOS boundary checking\n\nBounds checking when parsing init scripts embedded in the BIOS reject\naccess to the last byte. This causes driver initialization to fail on\nApple eMac\u0027s with GeForce 2 MX GPUs, leaving the system with no working\nconsole.\n\nThis is probably only seen on OpenFirmware machines like PowerPC Macs\nbecause the BIOS image provided by OF is only the used parts of the ROM,\nnot a power-of-two blocks read from PCI directly so PCs always have\nempty bytes at the end that are never accessed."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/nouveau: solucionado por uno en la comprobaci\u00f3n de los l\u00edmites del BIOS. La comprobaci\u00f3n de los l\u00edmites al analizar los scripts de inicio integrados en el BIOS rechaza el acceso al \u00faltimo byte. Esto hace que la inicializaci\u00f3n del controlador falle en Apple eMac con GPU GeForce 2 MX, dejando el sistema sin consola funcional. Probablemente esto solo se vea en m\u00e1quinas OpenFirmware como PowerPC Mac porque la imagen del BIOS proporcionada por OF es solo las partes utilizadas de la ROM, no una potencia de dos bloques le\u00edda directamente desde PCI, por lo que las PC siempre tienen bytes vac\u00edos al final que son nunca accedido."
    }
  ],
  "id": "CVE-2022-48732",
  "lastModified": "2024-11-21T07:33:53.200",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2024-06-20T12:15:11.607",
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  "vulnStatus": "Modified",
  "weaknesses": [
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          "lang": "en",
          "value": "CWE-193"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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