fkie_cve-2024-46774
Vulnerability from fkie_nvd
Published
2024-09-18 08:15
Modified
2025-05-02 07:15
Severity ?
7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: powerpc/rtas: Prevent Spectre v1 gadget construction in sys_rtas() Smatch warns: arch/powerpc/kernel/rtas.c:1932 __do_sys_rtas() warn: potential spectre issue 'args.args' [r] (local cap) The 'nargs' and 'nret' locals come directly from a user-supplied buffer and are used as indexes into a small stack-based array and as inputs to copy_to_user() after they are subject to bounds checks. Use array_index_nospec() after the bounds checks to clamp these values for speculative execution.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0974d03eb479384466d828d65637814bee6b26d7Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1f1feff02e9da0dd0cdb195c428c42b5f9b6c771
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/68d8156480940b79227d58865ec5d2947b9384a8Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a262c2dc833f2fe1bd5c53a4d899e7077d3b1da9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b137af795399d8b657bad1646c18561530f35ed1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d2834ff1d9641a8695a09ea79cd901c7b6d4d05f
Impacted products
Vendor Product Version
linux linux_kernel *


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "75C6119D-9E8D-431D-813F-FE84579072CB",
              "versionEndExcluding": "6.10.10",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/rtas: Prevent Spectre v1 gadget construction in sys_rtas()\n\nSmatch warns:\n\n  arch/powerpc/kernel/rtas.c:1932 __do_sys_rtas() warn: potential\n  spectre issue \u0027args.args\u0027 [r] (local cap)\n\nThe \u0027nargs\u0027 and \u0027nret\u0027 locals come directly from a user-supplied\nbuffer and are used as indexes into a small stack-based array and as\ninputs to copy_to_user() after they are subject to bounds checks.\n\nUse array_index_nospec() after the bounds checks to clamp these values\nfor speculative execution."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: powerpc/rtas: Impedir la construcci\u00f3n del gadget Spectre v1 en sys_rtas() Smatch advierte: arch/powerpc/kernel/rtas.c:1932 __do_sys_rtas() advierte: posible problema de Spectre \u0027args.args\u0027 [r] (cap local) Las variables locales \u0027nargs\u0027 y \u0027nret\u0027 provienen directamente de un b\u00fafer proporcionado por el usuario y se usan como \u00edndices en una peque\u00f1a matriz basada en pila y como entradas para copy_to_user() despu\u00e9s de que est\u00e9n sujetas a verificaciones de l\u00edmites. Utilice array_index_nospec() despu\u00e9s de las verificaciones de l\u00edmites para fijar estos valores para la ejecuci\u00f3n especulativa."
    }
  ],
  "id": "CVE-2024-46774",
  "lastModified": "2025-05-02T07:15:55.190",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.2,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2024-09-18T08:15:05.180",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/0974d03eb479384466d828d65637814bee6b26d7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1f1feff02e9da0dd0cdb195c428c42b5f9b6c771"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/68d8156480940b79227d58865ec5d2947b9384a8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a262c2dc833f2fe1bd5c53a4d899e7077d3b1da9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b137af795399d8b657bad1646c18561530f35ed1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d2834ff1d9641a8695a09ea79cd901c7b6d4d05f"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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