CVE-2019-19332

Se encontró un problema de escritura de memoria fuera de límites en el kernel de Linux, versiones 3.13 hasta 5.4, en la manera en que el hipervisor KVM del kernel de Linux manejó la petición "KVM_GET_EMULATED_CPUID" ioctl(2) para obtener las funcionalidades de CPUID emuladas por el hipervisor KVM. Un usuario o proceso capaz de acceder al dispositivo "/dev/kvm" podría usar este fallo para bloquear el sistema, resultando en una denegación de servicio.

An out-of-bounds memory write issue was found in the way the Linux kernel's KVM hypervisor handled the 'KVM_GET_EMULATED_CPUID' ioctl(2) request to get CPUID features emulated by the KVM hypervisor. A user or process able to access the '/dev/kvm' device could use this flaw to crash the system, resulting in a denial of service.

It was discovered that the Atheros 802.11ac wireless USB device driver in the Linux kernel did not properly validate device metadata. A physically proximate attacker could use this to cause a denial of service. It was discovered that a race condition existed in the Virtual Video Test Driver in the Linux kernel. An attacker with write access to /dev/video0 on a system with the vivid module loaded could possibly use this to gain administrative privileges. Various other issues were also addressed.