CVE-2023-42752

Se encontró una falla de desbordamiento de enteros en el kernel de Linux. Este problema lleva a que el kernel asigne `skb_shared_info` en el espacio de usuario, lo cual es explotable en sistemas sin protección SMAP ya que `skb_shared_info` contiene referencias a punteros de función.

Ross Lagerwall discovered that the Xen netback backend driver in the Linux kernel did not properly handle certain unusual packets from a paravirtualized network frontend, leading to a buffer overflow. An attacker in a guest VM could use this to cause a denial of service or possibly execute arbitrary code. It was discovered that the netfilter subsystem in the Linux kernel did not properly handle PIPAPO element removal, leading to a use-after-free vulnerability. A local attacker could possibly use this to cause a denial of service or execute arbitrary code.