CVE-2026-68296 | Linux Kernel up to 6.12.100/6.18.41/7.1.5/7.2-rc4 GRE Tunnels __gre_tunnel_init/ip6gre_tnl_init_features deadlock

A vulnerability marked as critical has been reported in Linux Kernel up to 6.12.100/6.18.41/7.1.5/7.2-rc4. Affected by this vulnerability is the function __gre_tunnel_init/ip6gre_tnl_init_features of the component GRE Tunnels. The manipulation leads to deadlock.

This vulnerability is traded as CVE-2026-68296. It is possible to initiate the attack remotely. There is no exploit available.

It is suggested to upgrade the affected component.