kernel: improper input validation in tipc_nl_retrieve_key function in net/tipc/node.c

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...

The vulnerability of the `tipc_nl_retrieve_key` function in the Linux operating system allows a hacker to cause a service failure.

The vulnerability of the tipcnlretrievekey function net/tipc/node.c in the Linux kernel exists due to insufficient validation of input data. Exploiting this vulnerability could allow an attacker to cause a service failure...

An issue was discovered in the Linux kernel before 5.11.11. tipc_nl_retrieve_key in net/tipc/node.c does not properly validate certain data sizes aka CID-0217ed2848e8.

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