https://bitcoincore.org/bin/bitcoin-core-27.1/
https://github.com/bitcoin/bitcoin/blob/master/doc/release-notes/release-notes-27.1.md
Issue tracking individual PRs that merge clustermempool infrastructure into master https://github.com/bitcoin/bitcoin/issues/30289
https://delvingbitcoin.org/t/cluster-mempool-definitions-theory/202
https://github.com/bitcoin/bitcoin/pull/28676
https://github.com/dogecoin/dogecoin/issues/3556
LND versions prior to 0.17.0 are vulnerable to a DoS attack where malicious onion packets cause the node to instantly run out of memory (OOM) and crash. If you are running an LND release older than this, your funds are at risk! Update to at least 0.17.0 to protect your node.
https://morehouse.github.io/lightning/lnd-onion-bomb/
Version 3 transaction relay is a proposal to allow transactions to opt-in to a modified set of transaction relay policies designed to prevent pinning attacks. Combined with package relay, these policies help enable the use of dynamic feerates with LN onchain transactions.
https://bitcoinops.org/en/topics/version-3-transaction-relay/
It also describes a type of policy with adjusted topology limits which, combined with other policy rules, helps minimize the potential pinning problems. These restrictions simplify the assessment of incentive compatibility of accepting or replacing such transactions, thus helping ensure any replacements are more profitable for the node. Within the context of nodes that implement this policy, fee-bumping is more reliable for users.
https://github.com/bitcoin/bips/blob/master/bip-0431.mediawiki
https://github.com/bitcoin/bitcoin/pull/29496
https://github.com/bitcoin/bitcoin/pull/30272