FKIE_CVE-2024-36912

Vulnerability from fkie_nvd - Published: 2024-05-30 16:15 - Updated: 2025-11-18 16:23
Severity ?
8.1 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: Drivers: hv: vmbus: Track decrypted status in vmbus_gpadl In CoCo VMs it is possible for the untrusted host to cause set_memory_encrypted() or set_memory_decrypted() to fail such that an error is returned and the resulting memory is shared. Callers need to take care to handle these errors to avoid returning decrypted (shared) memory to the page allocator, which could lead to functional or security issues. In order to make sure callers of vmbus_establish_gpadl() and vmbus_teardown_gpadl() don't return decrypted/shared pages to allocators, add a field in struct vmbus_gpadl to keep track of the decryption status of the buffers. This will allow the callers to know if they should free or leak the pages.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1999644d95194d4a58d3e80ad04ce19220a01a81Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/211f514ebf1ef5de37b1cf6df9d28a56cfd242caPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8e62341f5c45b27519b7d193bcc32ada416ad9d8Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bfae56be077ba14311509e70706a13458f87ea99Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/1999644d95194d4a58d3e80ad04ce19220a01a81Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/211f514ebf1ef5de37b1cf6df9d28a56cfd242caPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/8e62341f5c45b27519b7d193bcc32ada416ad9d8Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/bfae56be077ba14311509e70706a13458f87ea99Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.9
linux linux_kernel 6.9
linux linux_kernel 6.9
To clipboard 

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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nDrivers: hv: vmbus: Track decrypted status in vmbus_gpadl\n\nIn CoCo VMs it is possible for the untrusted host to cause\nset_memory_encrypted() or set_memory_decrypted() to fail such that an\nerror is returned and the resulting memory is shared. Callers need to\ntake care to handle these errors to avoid returning decrypted (shared)\nmemory to the page allocator, which could lead to functional or security\nissues.\n\nIn order to make sure callers of vmbus_establish_gpadl() and\nvmbus_teardown_gpadl() don\u0027t return decrypted/shared pages to\nallocators, add a field in struct vmbus_gpadl to keep track of the\ndecryption status of the buffers. This will allow the callers to\nknow if they should free or leak the pages."
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      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: Controladores: hv: vmbus: Seguimiento del estado descifrado en vmbus_gpadl En m\u00e1quinas virtuales CoCo, es posible que el host que no es de confianza provoque que set_memory_encrypted() o set_memory_decrypted() falle de manera que se devuelva un error y la memoria resultante se comparte. Las personas que llaman deben tener cuidado al manejar estos errores para evitar devolver memoria descifrada (compartida) al asignador de p\u00e1ginas, lo que podr\u00eda provocar problemas funcionales o de seguridad. Para asegurarse de que las personas que llaman a vmbus_establish_gpadl() y vmbus_teardown_gpadl() no devuelvan p\u00e1ginas descifradas/compartidas a los asignadores, agregue un campo en la estructura vmbus_gpadl para realizar un seguimiento del estado de descifrado de los b\u00faferes. Esto permitir\u00e1 a quienes llaman saber si deben liberar o filtrar las p\u00e1ginas."
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  "id": "CVE-2024-36912",
  "lastModified": "2025-11-18T16:23:46.257",
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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