CVE-2019-19053

Una pérdida de memoria en la función rpmsg_eptdev_write_iter() en el archivo drivers/rpmsg/rpmsg_char.c en el kernel de Linux versiones hasta la versión 5.3.11, permite a atacantes causar una denegación de servicio (consumo de memoria) al desencadenar fallos de la función copy_from_iter_full(), también se conoce como CID-bbe692e349e2.

It was discovered that the KVM implementation in the Linux kernel, when paravirtual TLB flushes are enabled in guests, the hypervisor in some situations could miss deferred TLB flushes or otherwise mishandle them. An attacker in a guest VM could use this to expose sensitive information. Paulo Bonzini discovered that the KVM hypervisor implementation in the Linux kernel could improperly let a nested guest access the resources of a parent guest in certain situations. An attacker could use this to expose sensitive information. Various other issues were also addressed.