{
  "id": "CVE-2024-47141",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2025-01-11T13:15:21.830",
  "lastModified": "2025-01-31T15:52:41.007",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npinmux: Use sequential access to access desc->pinmux data\n\nWhen two client of the same gpio call pinctrl_select_state() for the\nsame functionality, we are seeing NULL pointer issue while accessing\ndesc->mux_owner.\n\nLet's say two processes A, B executing in pin_request() for the same pin\nand process A updates the desc->mux_usecount but not yet updated the\ndesc->mux_owner while process B see the desc->mux_usecount which got\nupdated by A path and further executes strcmp and while accessing\ndesc->mux_owner it crashes with NULL pointer.\n\nSerialize the access to mux related setting with a mutex lock.\n\n\tcpu0 (process A)\t\t\tcpu1(process B)\n\npinctrl_select_state() {\t\t  pinctrl_select_state() {\n  pin_request() {\t\t\t\tpin_request() {\n  ...\n\t\t\t\t\t\t ....\n    } else {\n         desc->mux_usecount++;\n    \t\t\t\t\t\tdesc->mux_usecount && strcmp(desc->mux_owner, owner)) {\n\n         if (desc->mux_usecount > 1)\n               return 0;\n         desc->mux_owner = owner;\n\n  }\t\t\t\t\t\t}"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: pinmux: usar acceso secuencial para acceder a los datos de desc->pinmux Cuando dos clientes del mismo gpio llaman a pinctrl_select_state() para la misma funcionalidad, vemos un problema de puntero NULL al acceder a desc->mux_owner. Digamos que dos procesos A, B se ejecutan en pin_request() para el mismo pin y el proceso A actualiza desc->mux_usecount pero a\u00fan no actualiza desc->mux_owner mientras que el proceso B ve desc->mux_usecount que fue actualizado por la ruta A y luego ejecuta strcmp y mientras accede a desc->mux_owner se bloquea con el puntero NULL. Serialice el acceso a la configuraci\u00f3n relacionada con mux con un bloqueo de mutex. cpu0 (proceso A) cpu1 (proceso B) pinctrl_select_state() { pinctrl_select_state() { pin_request() { pin_request() { ... .... } de lo contrario { desc->mux_usecount++; desc->mux_usecount && strcmp(desc->mux_owner, propietario)) { si (desc->mux_usecount > 1) devuelve 0; desc->mux_owner = propietario; } }"
    }
  ],
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    "cvssMetricV31": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6
      }
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  "weaknesses": [
    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
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          "lang": "en",
          "value": "CWE-667"
        }
      ]
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      "url": "https://git.kernel.org/stable/c/2da32aed4a97ca1d70fb8b77926f72f30ce5fb4b",
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