CVE-2017-14156

La función atyfb_ioctl en drivers/video/fbdev/aty/atyfb_base.c en las versiones de Linux kernel hasta la 4.12.10 no inicializa una estructura de datos específica. Esto permite a los usuarios locales obtener información sensible de la memoria de pila del kernel leyendo ubicaciones relacionadas con bytes de relleno.

Anthony Perard discovered that the Xen virtual block driver did not properly initialize some data structures before passing them to user space. A local attacker in a guest VM could use this to expose sensitive information from the host OS or other guest VMs. Bo Zhang discovered that the netlink wireless configuration interface in the Linux kernel did not properly validate attributes when handling certain requests. A local attacker with the CAP_NET_ADMIN could use this to cause a denial of service. Various other issues were also addressed.