CVE-2019-19068

Una pérdida de memoria en la función rtl8xxxu_submit_int_urb() en el archivo drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.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 usb_submit_urb(), también se conoce como CID-a2cdd07488e6.

A flaw was found in the Linux kernel. A memory leak in the realtek driver allows an attacker to cause a denial of service through memory consumption. The highest threat from this vulnerability is to system availability.

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.