CVE-2026-74490

In the Linux kernel, the following vulnerability has been resolved:

tipc: avoid use-after-free in poll trace queue dumps

TIPC socket tracepoints dump queue state through tipc_sk_dump(). Most

queue-dump callsites already serialize that walk under the socket lock or

sk->sk_lock.slock, but tipc_poll() calls trace_tipc_sk_poll(...,

TIPC_DUMP_ALL, ...) without holding either lock.

That lets the poll trace path reach tipc_list_dump() and backlog head/tail

dumping while another context dequeues and frees an skb, leaving the trace

helper dereferencing a stale queue entry.

Stop the unlocked poll trace site from requesting queue dumps. Other queue

dump trace callsites keep their existing output under the locking they

already provide, while poll still emits the event itself without walking

live queue members from an unlocked context.