CVE-2018-19407

La función vcpu_scan_ioapic en arch/x86/kvm/x86.c en el kernel de Linux hasta la versión 4.19.2 permite que usuarios locales provoquen una denegación de servicio (desreferencia de puntero NULLy error) mediante llamadas del sistema manipuladas que alcanzan una situación donde ioapic no está inicializado.

It was discovered that a race condition existed in the vsock address family implementation of the Linux kernel that could lead to a use-after-free condition. A local attacker in a guest virtual machine could use this to expose sensitive information. Cfir Cohen discovered that a use-after-free vulnerability existed in the KVM implementation of the Linux kernel, when handling interrupts in environments where nested virtualization is in use. A local attacker in a guest VM could possibly use this to gain administrative privileges in a host machine. Various other issues were also addressed.