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Vulnerability Change Records for CVE-2021-46907

Change History

CVE Translated by kernel.org 3/19/2024 9:15:06 AM

Action Type Old Value New Value
Removed Translation
Title: kernel de Linux
Description: En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: KVM: VMX: No use vcpu->run->internal.ndata como índice de matriz __vmx_handle_exit() usa vcpu->run->internal.ndata como índice para un acceso a la matriz. Dado que vcpu->run está (puede) asignarse a un espacio de direcciones de usuario con permiso de escritor, el proceso de usuario podría actualizar el 'ndata' en cualquier momento (el proceso de usuario puede configurarlo fuera de los límites de la matriz). Por lo tanto, no es seguro que __vmx_handle_exit() use 'ndata' de esa manera.

								
						

CVE Modified by kernel.org 3/19/2024 9:15:06 AM

Action Type Old Value New Value
Changed Description
In the Linux kernel, the following vulnerability has been resolved:

KVM: VMX: Don't use vcpu->run->internal.ndata as an array index

__vmx_handle_exit() uses vcpu->run->internal.ndata as an index for
an array access.  Since vcpu->run is (can be) mapped to a user address
space with a writer permission, the 'ndata' could be updated by the
user process at anytime (the user process can set it to outside the
bounds of the array).
So, it is not safe that __vmx_handle_exit() uses the 'ndata' that way.
Rejected reason: This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.
Removed Reference
kernel.org https://git.kernel.org/stable/c/04c4f2ee3f68c9a4bf1653d15f1a9a435ae33f7a

								
						
Removed Reference
kernel.org https://git.kernel.org/stable/c/7f64753835a78c7d2cc2932a5808ef3b7fd4c050

								
						
Removed Reference
kernel.org https://git.kernel.org/stable/c/ce541d7b59566a0d94c7c99bfb5d34b050e6af70

								
						

CVE Rejected by kernel.org 3/19/2024 9:15:06 AM

Action Type Old Value New Value