{
  "id": "CVE-2024-39462",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2024-06-25T15:15:14.580",
  "lastModified": "2024-11-21T09:27:42.857",
  "vulnStatus": "Awaiting Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nclk: bcm: dvp: Assign ->num before accessing ->hws\n\nCommit f316cdff8d67 (\"clk: Annotate struct clk_hw_onecell_data with\n__counted_by\") annotated the hws member of 'struct clk_hw_onecell_data'\nwith __counted_by, which informs the bounds sanitizer about the number\nof elements in hws, so that it can warn when hws is accessed out of\nbounds. As noted in that change, the __counted_by member must be\ninitialized with the number of elements before the first array access\nhappens, otherwise there will be a warning from each access prior to the\ninitialization because the number of elements is zero. This occurs in\nclk_dvp_probe() due to ->num being assigned after ->hws has been\naccessed:\n\n  UBSAN: array-index-out-of-bounds in drivers/clk/bcm/clk-bcm2711-dvp.c:59:2\n  index 0 is out of range for type 'struct clk_hw *[] __counted_by(num)' (aka 'struct clk_hw *[]')\n\nMove the ->num initialization to before the first access of ->hws, which\nclears up the warning."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: clk: bcm: dvp: Assign ->num before accessing ->hws Commit f316cdff8d67 (\"clk: Annotate struct clk_hw_onecell_data with __counted_by\") anot\u00f3 el miembro hws de 'struct clk_hw_onecell_data' con __counted_by, que informa al sanitizante de los l\u00edmites sobre la cantidad de elementos en hws, para que pueda advertir cuando se accede a hws fuera de los l\u00edmites. Como se se\u00f1al\u00f3 en ese cambio, el miembro __counted_by debe inicializarse con la cantidad de elementos antes de que ocurra el primer acceso a la matriz; de lo contrario, habr\u00e1 una advertencia de cada acceso antes de la inicializaci\u00f3n porque la cantidad de elementos es cero. Esto ocurre en clk_dvp_probe() debido a que ->num se asigna despu\u00e9s de que se haya accedido a ->hws: UBSAN: array-index-out-of-bounds in drivers/clk/bcm/clk-bcm2711-dvp.c:59:2 El \u00edndice 0 est\u00e1 fuera del rango para el tipo 'struct clk_hw *[] __counted_by(num)' (tambi\u00e9n conocido como 'struct clk_hw *[]'). Mueva la inicializaci\u00f3n ->num antes del primer acceso de ->hws, lo que borra la advertencia. ."
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9
      }
    ]
  },
  "weaknesses": [
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/0dc913217fb79096597005bba9ba738e2db5cd02",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/9368cdf90f52a68120d039887ccff74ff33b4444",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/a1dd92fca0d6b58b55ed0484f75d4205dbb77010",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/0dc913217fb79096597005bba9ba738e2db5cd02",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://git.kernel.org/stable/c/9368cdf90f52a68120d039887ccff74ff33b4444",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://git.kernel.org/stable/c/a1dd92fca0d6b58b55ed0484f75d4205dbb77010",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ]
}