{
  "id": "CVE-2022-49076",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2025-02-26T07:00:44.943",
  "lastModified": "2025-02-27T19:15:41.213",
  "vulnStatus": "Awaiting Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/hfi1: Fix use-after-free bug for mm struct\n\nUnder certain conditions, such as MPI_Abort, the hfi1 cleanup code may\nrepresent the last reference held on the task mm.\nhfi1_mmu_rb_unregister() then drops the last reference and the mm is freed\nbefore the final use in hfi1_release_user_pages().  A new task may\nallocate the mm structure while it is still being used, resulting in\nproblems. One manifestation is corruption of the mmap_sem counter leading\nto a hang in down_write().  Another is corruption of an mm struct that is\nin use by another task."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: RDMA/hfi1: Se corrige el error de use-after-free para la estructura mm En determinadas condiciones, como MPI_Abort, el c\u00f3digo de limpieza hfi1 puede representar la \u00faltima referencia retenida en la tarea mm. Luego, hfi1_mmu_rb_unregister() elimina la \u00faltima referencia y la mm se libera antes del uso final en hfi1_release_user_pages(). Una nueva tarea puede asignar la estructura mm mientras a\u00fan se est\u00e1 utilizando, lo que genera problemas. Una manifestaci\u00f3n es la corrupci\u00f3n del contador mmap_sem que provoca un bloqueo en down_write(). Otra es la corrupci\u00f3n de una estructura mm que est\u00e1 en uso por otra tarea."
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary",
        "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
      }
    ]
  },
  "weaknesses": [
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/0b7186d657ee55e2cdefae498f07d5c1961e8023",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/2bbac98d0930e8161b1957dc0ec99de39ade1b3c",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/5a9a1b24ddb510715f8f621263938186579a965c",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/5f54364ff6cfcd14cddf5441c4a490bb28dd69f7",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/9ca11bd8222a612de0d2f54d050bfcf61ae2883f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}