{"id":86245,"date":"2026-04-25T22:01:40","date_gmt":"2026-04-25T22:01:40","guid":{"rendered":"https:\/\/dogewisperer.com\/?p=86245"},"modified":"2026-04-25T22:01:40","modified_gmt":"2026-04-25T22:01:40","slug":"litecoin-core-v0-21-5-4-release","status":"publish","type":"post","link":"https:\/\/dogewisperer.com\/?p=86245","title":{"rendered":"Litecoin Core v0.21.5.4 Release"},"content":{"rendered":"<div>\n<h3>Litecoin Core v0.21.5.4 Release<\/h3>\n<p><strong><em>Follow our <\/em><\/strong><a href=\"https:\/\/twitter.com\/litecoinproject\"><strong><em>Twitter<\/em><\/strong><\/a><strong><em> for the latest dev\u00a0news.<\/em><\/strong><\/p>\n<figure><img decoding=\"async\" alt=\"\" src=\"https:\/\/cdn-images-1.medium.com\/max\/1024\/1*iObMl17vRHARav3bEPuL_Q.jpeg\"><figcaption><a href=\"https:\/\/www.pexels.com\/@alesiakozik\/\">Alesia Kozik<\/a>\u200a\u2014\u200aPhysical Litecoin &amp;\u00a0Bitcoin<\/figcaption><\/figure>\n<p><a href=\"https:\/\/download.litecoin.org\/litecoin-0.21.5.4\">Litecoin Core version 0.21.5.4 is now available.<\/a><\/p>\n<p>This release includes important security updates. All node operators and wallet users are strongly encouraged to upgrade\u00a0ASAP.<\/p>\n<p>Please report bugs using the issue tracker at GitHub: <a href=\"https:\/\/github.com\/litecoin-project\/litecoin\/issues\">https:\/\/github.com\/litecoin-project\/litecoin\/issues<\/a><\/p>\n<h3>Notable changes<\/h3>\n<h4>Important Security\u00a0Updates<\/h4>\n<p>This release contains fixes for the following security\u00a0issues:<\/p>\n<ul>\n<li>e7cbf1d: Belt-and-suspenders input commitment and public key checks on MWEB inputs, providing additional defense-in-depth<br \/>during MWEB transaction validation.<\/li>\n<li>1dcbf3f: MWEB consensus fix addressing an input validation issue that could allow the MWEB kernel sum to become unbalanced.<br \/>This corrects MWEB input\/output accounting going forward and is a required upgrade for all node operators, miners, and wallet\u00a0users.<\/li>\n<li>42e7071: Prevent kernel fee overflow during MWEB transaction validation.<\/li>\n<li>742ee94: Erase block data for mutated blocks to avoid miner\u00a0DoS<\/li>\n<li>f423a84: Miners no longer include MWEB transactions when the input and output commitments in the block would sum to\u00a0zero.<\/li>\n<\/ul>\n<h4>MWEB stability and durability fixes<\/h4>\n<ul>\n<li>23e5eac: fix data corruption issue on PMMR\u00a0rewind<\/li>\n<li>bf25a7c, 3110a7e: improve file write durability for\u00a0MMRs<\/li>\n<\/ul>\n<h4>Wallet<\/h4>\n<ul>\n<li>eae9e47: add MWEB view keys to `dumpwallet` output<\/li>\n<li>3c3aedb, c882663\u00a0: fix wallet with Boost library &gt;=\u00a01.78<\/li>\n<li>1cc1cee: wallet: quick pegout accounting fix<\/li>\n<\/ul>\n<h4>RPC and\u00a0indexing<\/h4>\n<ul>\n<li>455aff8: allow `getblocktemplate` for test chains when unconnected or in\u00a0IBD<\/li>\n<li>eb7f68a: fix an issue where transaction indexes of a block could be lost when `WriteBlock` failed after\u00a0`Commit`<\/li>\n<\/ul>\n<h4>Build changes<\/h4>\n<ul>\n<li>6fc0530: fix debug build conflict with logger\u00a0symbol<\/li>\n<li>58f89ba: add missing `&lt;cstdint&gt;` include<\/li>\n<li>dcc7bc5: convert CRLF (Windows) line endings to LF (Linux) line\u00a0endings<\/li>\n<\/ul>\n<h4>Test related\u00a0fixes<\/h4>\n<ul>\n<li>0c59e99: functional test framework fix<\/li>\n<li>7eb181b: functional test demonstrating handling of mutated\u00a0blocks<\/li>\n<\/ul>\n<h4>Misc<\/h4>\n<ul>\n<li>0f5f7d5: fix broken Transifex link from\u00a0README<\/li>\n<\/ul>\n<h4>Credits<\/h4>\n<p>Thanks to everyone who directly contributed to this\u00a0release:<\/p>\n<p>&#8211; <a href=\"https:\/\/github.com\/bitcoin\/bitcoin\/\">The Bitcoin Core Developers<\/a><br \/>&#8211; <a href=\"https:\/\/github.com\/DavidBurkett\/\">David Burkett<\/a><br \/>&#8211; <a href=\"https:\/\/github.com\/hectorchu\">Hector Chu<\/a><br \/>&#8211; <a href=\"https:\/\/github.com\/losh11\">Loshan<\/a><br \/>&#8211; <a href=\"https:\/\/github.com\/luke-mckay\">Luke E. McKay<\/a><br \/>&#8211; <a href=\"https:\/\/github.com\/sorenstoutner\">Soren Stoutner<\/a><br \/>&#8211; <a href=\"https:\/\/github.com\/jorgesumle\">Jorge Maldonado Ventura<\/a><br \/>&#8211; <a href=\"https:\/\/github.com\/yujianxian\">yujianxian<\/a><br \/>&#8211; <a href=\"https:\/\/github.com\/AleksandrRadik\">AlexRadik<\/a><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/medium.com\/_\/stat?event=post.clientViewed&amp;referrerSource=full_rss&amp;postId=902232ac8e2b\" width=\"1\" height=\"1\" alt=\"\"><\/p>\n<hr>\n<p><a href=\"https:\/\/blog.litecoin.org\/litecoin-core-v0-21-5-4-release-902232ac8e2b\">Litecoin Core v0.21.5.4 Release<\/a> was originally published in <a href=\"https:\/\/blog.litecoin.org\/\">Litecoin Project<\/a> on Medium, where people are continuing the conversation by highlighting and responding to this story.<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Litecoin Core v0.21.5.4 Release Follow our Twitter for the latest dev\u00a0news. Alesia Kozik\u200a\u2014\u200aPhysical Litecoin &amp;\u00a0Bitcoin Litecoin Core version 0.21.5.4 is now available. This release includes important security updates. All node operators and wallet users are strongly encouraged to upgrade\u00a0ASAP. Please report bugs using the issue tracker at GitHub: https:\/\/github.com\/litecoin-project\/litecoin\/issues Notable changes Important Security\u00a0Updates This release [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"iawp_total_views":0,"footnotes":""},"categories":[2],"tags":[3,4,5],"class_list":["post-86245","post","type-post","status-publish","format-standard","hentry","category-news","tag-crypto","tag-doge","tag-news"],"_links":{"self":[{"href":"https:\/\/dogewisperer.com\/index.php?rest_route=\/wp\/v2\/posts\/86245","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dogewisperer.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dogewisperer.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dogewisperer.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dogewisperer.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=86245"}],"version-history":[{"count":0,"href":"https:\/\/dogewisperer.com\/index.php?rest_route=\/wp\/v2\/posts\/86245\/revisions"}],"wp:attachment":[{"href":"https:\/\/dogewisperer.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=86245"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dogewisperer.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=86245"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dogewisperer.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=86245"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}