CVE-2025-21759

CVE-2025-21759: In the Linux kernel, ipv6 mcast path igmp6_send() could be invoked without RTNL/RCU held, risking use-after-free of the net pointer. The fix extends RCU protection to safely fetch the net pointer and avoid UAF, and replaces sock_alloc_send_skb usage with alloc_skb under RCU protec...