fkie_cve-2022-49098
Vulnerability from fkie_nvd
Published
2025-02-26 07:00
Modified
2025-02-26 07:00
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: Drivers: hv: vmbus: Fix potential crash on module unload The vmbus driver relies on the panic notifier infrastructure to perform some operations when a panic event is detected. Since vmbus can be built as module, it is required that the driver handles both registering and unregistering such panic notifier callback. After commit 74347a99e73a ("x86/Hyper-V: Unload vmbus channel in hv panic callback") though, the panic notifier registration is done unconditionally in the module initialization routine whereas the unregistering procedure is conditionally guarded and executes only if HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE capability is set. This patch fixes that by unconditionally unregistering the panic notifier in the module's exit routine as well.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2133c422a103cf7c7768c37b9ac382e73b691892
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3d0078f8bddd58d9bb1ad40bbe929f8633abb276
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5ea98d0f5f035c1bcf1517ccec0e024ae35a48b2
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6b4c0149a56147b29169e07000d566162892722a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/792f232d57ff28bbd5f9c4abe0466b23d5879dc8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cf580d2e3884dbafd6b90269b03a24d661578624
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dcd6b1a624c0ffa21034d8b1e02e9d068458f596
Impacted products
Vendor Product Version


To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nDrivers: hv: vmbus: Fix potential crash on module unload\n\nThe vmbus driver relies on the panic notifier infrastructure to perform\nsome operations when a panic event is detected. Since vmbus can be built\nas module, it is required that the driver handles both registering and\nunregistering such panic notifier callback.\n\nAfter commit 74347a99e73a (\"x86/Hyper-V: Unload vmbus channel in hv panic callback\")\nthough, the panic notifier registration is done unconditionally in the module\ninitialization routine whereas the unregistering procedure is conditionally\nguarded and executes only if HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE capability\nis set.\n\nThis patch fixes that by unconditionally unregistering the panic notifier\nin the module\u0027s exit routine as well."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: Controladores: hv: vmbus: corrige un posible fallo al descargar un m\u00f3dulo El controlador vmbus depende de la infraestructura del notificador de p\u00e1nico para realizar algunas operaciones cuando se detecta un evento de p\u00e1nico. Dado que vmbus se puede crear como un m\u00f3dulo, se requiere que el controlador controle tanto el registro como la anulaci\u00f3n del registro de dicha devoluci\u00f3n de llamada del notificador de p\u00e1nico. Sin embargo, despu\u00e9s de el commit 74347a99e73a (\"x86/Hyper-V: Descargar canal vmbus en la devoluci\u00f3n de llamada de p\u00e1nico hv\"), el registro del notificador de p\u00e1nico se realiza de forma incondicional en la rutina de inicializaci\u00f3n del m\u00f3dulo, mientras que el procedimiento de anulaci\u00f3n del registro se protege de forma condicional y se ejecuta solo si se establece la capacidad HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE. Este parche corrige eso anulando incondicionalmente el registro del notificador de p\u00e1nico tambi\u00e9n en la rutina de salida del m\u00f3dulo."
    }
  ],
  "id": "CVE-2022-49098",
  "lastModified": "2025-02-26T07:00:47.247",
  "metrics": {},
  "published": "2025-02-26T07:00:47.247",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2133c422a103cf7c7768c37b9ac382e73b691892"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3d0078f8bddd58d9bb1ad40bbe929f8633abb276"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5ea98d0f5f035c1bcf1517ccec0e024ae35a48b2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6b4c0149a56147b29169e07000d566162892722a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/792f232d57ff28bbd5f9c4abe0466b23d5879dc8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/cf580d2e3884dbafd6b90269b03a24d661578624"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/dcd6b1a624c0ffa21034d8b1e02e9d068458f596"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.