Linux Kernel IPv6 RCU Protection Vulnerability in Default MSS Calculation

A vulnerability in the Linux kernel's IPv6 handling has been addressed. The issue arose because the function ip6_default_advmss() lacked proper Read-Copy-Update (RCU) protection, potentially allowing the network structure it accessed to be removed prematurely. This could lead to inconsistent or erroneous behavior in network packet handling.

Impact

Exploitation of this vulnerability could cause improper handling of network packets, potentially leading to instability or unexpected behavior in network communications.