CVE-2016-7039

La pila IP en el kernel de Linux hasta la versión 4.8.2 permite a atacantes remotos provocar una denegación de servicio (consumo de pila y pánico) o tener otro posible impacto no especificado desencadenando uso de la ruta GRO para paquetes grandes manipulados, como se demuestra por los paquetes que contienen solo cabeceras VLAN, un problema relacionado con CVE-2016-8666.

Linux kernel built with the 802.1Q/802.1ad VLAN(CONFIG_VLAN_8021Q) OR Virtual eXtensible Local Area Network(CONFIG_VXLAN) with Transparent Ethernet Bridging(TEB) GRO support, is vulnerable to a stack overflow issue. It could occur while receiving large packets via GRO path, as an unlimited recursion could unfold in both VLAN and TEB modules, leading to a stack corruption in the kernel.

It was discovered that an unbounded recursion in the VLAN and TEB Generic Receive Offload processing implementations in the Linux kernel, A remote attacker could use this to cause a stack corruption, leading to a denial of service. Marco Grassi discovered a use-after-free condition could occur in the TCP retransmit queue handling code in the Linux kernel. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. Various other issues were also addressed.