{
  "id": "CVE-2024-38667",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2024-06-24T14:15:12.790",
  "lastModified": "2024-11-21T09:26:35.473",
  "vulnStatus": "Modified",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nriscv: prevent pt_regs corruption for secondary idle threads\n\nTop of the kernel thread stack should be reserved for pt_regs. However\nthis is not the case for the idle threads of the secondary boot harts.\nTheir stacks overlap with their pt_regs, so both may get corrupted.\n\nSimilar issue has been fixed for the primary hart, see c7cdd96eca28\n(\"riscv: prevent stack corruption by reserving task_pt_regs(p) early\").\nHowever that fix was not propagated to the secondary harts. The problem\nhas been noticed in some CPU hotplug tests with V enabled. The function\nsmp_callin stored several registers on stack, corrupting top of pt_regs\nstructure including status field. As a result, kernel attempted to save\nor restore inexistent V context."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: riscv: evita la corrupci\u00f3n de pt_regs para subprocesos inactivos secundarios La parte superior de la pila de subprocesos del kernel debe reservarse para pt_regs. Sin embargo, este no es el caso de los subprocesos inactivos de los corazones de arranque secundarios. Sus pilas se superponen con sus pt_regs, por lo que ambos pueden corromperse. Se ha solucionado un problema similar para el coraz\u00f3n principal; consulte c7cdd96eca28 (\"riscv: evite la corrupci\u00f3n de la pila reservando task_pt_regs(p) anticipadamente\"). Sin embargo, esa soluci\u00f3n no se propag\u00f3 a los corazones secundarios. El problema se ha observado en algunas pruebas de conexi\u00f3n en caliente de CPU con V habilitado. La funci\u00f3n smp_callin almacen\u00f3 varios registros en la pila, corrompiendo la parte superior de la estructura pt_regs, incluido el campo de estado. Como resultado, el kernel intent\u00f3 guardar o restaurar el contexto V inexistente."
    }
  ],
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        "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:H/I:H/A:H",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9
      }
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  "weaknesses": [
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      "source": "nvd@nist.gov",
      "type": "Primary",
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          "value": "CWE-787"
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