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Kernel versions before 4.14.91 and before 4.19.13 are vulnerable."},{"lang":"es","value":"Se ha detectado un uso de memoria previamente liberada en la manera en la que el hypervisor KVM del kernel de Linux procesa las interrupciones publicadas cuando la virtualización \"nested(=1)\" se encuentra habilitada. En caso de que se produzca un error durante el procesamiento de las direcciones de las interrupciones publicadas, nested_get_vmcs12_pages() desmapea \"pi_desc_page\" sin restablecer la dirección del descriptor \"pi_desc\", la cual se utiliza posteriormente en pi_test_and_clear_on(). Un usuario invitado/proceso podría aprovechar este fallo para forzar un cierre inesperado en el kernel del host, lo que resultaría en DoS o en el acceso privilegiado a un sistema. Las versiones del kernel anteriores a la 4.14.91 y la 4.19.13 son vulnerables."}],"affected":[{"source":"secalert@redhat.com","affectedData":[{"vendor":"The Linux Foundation","product":"kernel:","versions":[{"version":"before 4.14.91","status":"affected"},{"version":"before 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