CVE-2026-43451

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> netfilter: nfnetlink_queue: fix entry leak in bridge verdict error path<br /> <br /> nfqnl_recv_verdict() calls find_dequeue_entry() to remove the queue<br /> entry from the queue data structures, taking ownership of the entry.<br /> For PF_BRIDGE packets, it then calls nfqa_parse_bridge() to parse VLAN<br /> attributes. If nfqa_parse_bridge() returns an error (e.g. NFQA_VLAN<br /> present but NFQA_VLAN_TCI missing), the function returns immediately<br /> without freeing the dequeued entry or its sk_buff.<br /> <br /> This leaks the nf_queue_entry, its associated sk_buff, and all held<br /> references (net_device refcounts, struct net refcount). Repeated<br /> triggering exhausts kernel memory.<br /> <br /> Fix this by dropping the entry via nfqnl_reinject() with NF_DROP verdict<br /> on the error path, consistent with other error handling in this file.