CVE-2021-29646

Se ha descubierto un problema en el kernel de Linux en versiones anteriores a la 5.11.11. tipc_nl_retrieve_key en net/tipc/node.c no valida correctamente ciertos tamaños de datos, también conocido como CID-0217ed2848e8.

A flaw buffer overflow in the Linux kernel TIPC protocol functionality was found in the way user uses protocol with encryption enabled. A local user could use this flaw to crash the system.

Ryota Shiga discovered that the eBPF implementation in the Linux kernel did not properly verify that a BPF program only reserved as much memory for a ring buffer as was allocated. A local attacker could use this to cause a denial of service or execute arbitrary code. Manfred Paul discovered that the eBPF implementation in the Linux kernel did not properly track bounds on bitwise operations. A local attacker could use this to cause a denial of service or execute arbitrary code. Various other issues were also addressed.