CVE-2021-38206

El subsistema mac80211 en el kernel de Linux versiones anteriores a 5.12.13, cuando se utiliza un dispositivo que sólo soporta 5 GHz, permite a atacantes causar una denegación de servicio (desreferencia de puntero NULL en el analizador de radiotap) al inyectar una trama con tasas 802.11a

Maxim Levitsky and Paolo Bonzini discovered that the KVM hypervisor implementation for AMD processors in the Linux kernel allowed a guest VM to disable restrictions on VMLOAD/VMSAVE in a nested guest. An attacker in a guest VM could use this to read or write portions of the host's physical memory. Maxim Levitsky discovered that the KVM hypervisor implementation for AMD processors in the Linux kernel did not properly prevent a guest VM from enabling AVIC in nested guest VMs. An attacker in a guest VM could use this to write to portions of the host's physical memory. Various other issues were also addressed.