nvd-json-data-feeds/CVE-2024/CVE-2024-566xx/CVE-2024-56665.json

{
  "id": "CVE-2024-56665",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2024-12-27T15:15:26.400",
  "lastModified": "2025-01-06T18:42:12.090",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf,perf: Fix invalid prog_array access in perf_event_detach_bpf_prog\n\nSyzbot reported [1] crash that happens for following tracing scenario:\n\n  - create tracepoint perf event with attr.inherit=1, attach it to the\n    process and set bpf program to it\n  - attached process forks -> chid creates inherited event\n\n    the new child event shares the parent's bpf program and tp_event\n    (hence prog_array) which is global for tracepoint\n\n  - exit both process and its child -> release both events\n  - first perf_event_detach_bpf_prog call will release tp_event->prog_array\n    and second perf_event_detach_bpf_prog will crash, because\n    tp_event->prog_array is NULL\n\nThe fix makes sure the perf_event_detach_bpf_prog checks prog_array\nis valid before it tries to remove the bpf program from it.\n\n[1] https://lore.kernel.org/bpf/Z1MR6dCIKajNS6nU@krava/T/#m91dbf0688221ec7a7fc95e896a7ef9ff93b0b8ad"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bpf,perf: Se corrige el acceso no v\u00e1lido a prog_array en perf_event_detach_bpf_prog Syzbot inform\u00f3 [1] un fallo que ocurre en el siguiente escenario de seguimiento: - crear un evento perf de tracepoint con attr.inherit=1, adjuntarlo al proceso y establecerle el programa bpf - el proceso adjunto se bifurca -> chid crea un evento heredado el nuevo evento secundario comparte el programa bpf del padre y tp_event (de ah\u00ed prog_array) que es global para tracepoint - salir tanto del proceso como de su hijo -> liberar ambos eventos - la primera llamada perf_event_detach_bpf_prog liberar\u00e1 tp_event->prog_array y la segunda perf_event_detach_bpf_prog se bloquear\u00e1, porque tp_event->prog_array es NULL La correcci\u00f3n asegura que las comprobaciones perf_event_detach_bpf_prog prog_array es v\u00e1lido antes de intentar eliminar el programa bpf de \u00e9l. [1] https://lore.kernel.org/bpf/Z1MR6dCIKajNS6nU@krava/T/#m91dbf0688221ec7a7fc95e896a7ef9ff93b0b8ad"
    }
  ],
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          "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"
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        "exploitabilityScore": 1.8,
        "impactScore": 3.6
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