In the Linux kernel, the following vulnerability has been resolved:
netfilter: nf_tables: fix underflow in chain reference counter
Set element addition error path decrements reference counter on chains twice: once on element release and again via nft_data_release().
Then, d6b478666ffa (netfilter: nf_tables: fix underflow in object reference counter) incorrectly fixed this by removing the stateful object reference count decrement.
Restore the stateful object decrement as in b91d90368837 (netfilter: nf_tables: fix leaking object reference count) and let nft_data_release() decrement the chain reference counter, so this is done only once.