CVE-2022-0500

Se ha encontrado un fallo en el uso irrestricto de eBPF por parte de BPF_BTF_LOAD, que conlleva una posible escritura de memoria fuera de los límites en el subsistema BPF del kernel de Linux debido a la forma en que un usuario carga BTF. este fallo permite a un usuario local bloquear o escalar sus privilegios en el sistema

Zhenpeng Lin discovered that the network packet scheduler implementation in the Linux kernel did not properly remove all references to a route filter before freeing it in some situations. A local attacker could use this to cause a denial of service or execute arbitrary code. It was discovered that the netfilter subsystem of the Linux kernel did not prevent one nft object from referencing an nft set in another nft table, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service or execute arbitrary code.