{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-05-11T22:29:36.883","vulnerabilities":[{"cve":{"id":"CVE-2021-3656","sourceIdentifier":"secalert@redhat.com","published":"2022-03-04T19:15:08.677","lastModified":"2024-11-21T06:22:05.187","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when processing the VMCB (virtual machine control block) provided by the L1 guest to spawn/handle a nested guest (L2). Due to improper validation of the \"virt_ext\" field, this issue could allow a malicious L1 to disable both VMLOAD/VMSAVE intercepts and VLS (Virtual VMLOAD/VMSAVE) for the L2 guest. As a result, the L2 guest would be allowed to read/write physical pages of the host, resulting in a crash of the entire system, leak of sensitive data or potential guest-to-host escape."},{"lang":"es","value":"Se ha encontrado un fallo en el código AMD de KVM para soportar la virtualización anidada SVM. El fallo es producido cuando es procesado el VMCB (bloque de control de la máquina virtual) proporcionado por el huésped L1 para generar/manejar un huésped anidado (L2). Debido a que no es comprobado apropiadamente el campo \"virt_ext\", este problema podría permitir a un L1 malicioso deshabilitar tanto las intercepciones VMLOAD/VMSAVE como el VLS (Virtual VMLOAD/VMSAVE) para el huésped L2. Como resultado, el invitado L2 podría leer/escribir páginas físicas del anfitrión, resultando en un bloqueo de todo el sistema, un filtrado de datos confidenciales o un potencial escape del invitado al 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