Key Takeaways: f2pool mined all 13 blocks on the valid Litecoin chain, resolving the April 25 network split. An MWEB exploit let an attacker fake an 85,034 LTC pegout, triggering a 13-block reorganization. Litecoin Core v0.21.5.4 now patches both the inflation bug and the mining node stall behind the attack. How the Exploit Unfolded On April 25, the Litecoin network began processing invalid transactions on its MWEB layer, a privacy extension that lets users obscure transaction amounts and addresses. A zero-day bug in the code enabled an attacker to manufacture a fraudulent pegout, a mechanism that moves litecoin from the …