{"id":82749,"date":"2026-07-30T20:46:33","date_gmt":"2026-07-30T17:16:33","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/cve-2026-54522-messagepackbufferclear-use-after-free-that-enables-cross-buffer-disclosure\/"},"modified":"2026-07-30T20:46:33","modified_gmt":"2026-07-30T17:16:33","slug":"cve-2026-54522-messagepackbufferclear-use-after-free-that-enables-cross-buffer-disclosure","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/cve-2026-54522-messagepackbufferclear-use-after-free-that-enables-cross-buffer-disclosure\/","title":{"rendered":"CVE-2026-54522 &#8211; MessagePack::Buffer#clear Use-After-Free that Enables Cross-Buffer Disclosure"},"content":{"rendered":"<p>CVE ID :CVE-2026-54522<\/p>\n<p>  Published : July 30, 2026, 5:16 p.m. | 28\u00a0minutes ago<\/p>\n<p>  Description :MessagePack for Ruby is an implementation of the MessagePack binary serialization format. Prior to 1.8.2, MessagePack::Buffer#clear in ext\/msgpack\/buffer.c leaves rmem_last, rmem_end, and rmem_owner stale after _msgpack_buffer_shift_chunk returns an rmem page to the shared pool, allowing a subsequent Buffer#write and a second MessagePack::Buffer to alias the page and disclose or corrupt cross-buffer data. This issue is fixed in version 1.8.2.<\/p>\n<p>  Severity: 2.1 | LOW<\/p>\n<p>  Visit the link for more details, such as CVSS details, affected products, timeline, and more&#8230;\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"<p>CVE ID :CVE-2026-54522 Published : July 30, 2026, 5:16 p.m. | 28\u00a0minutes ago Description :MessagePack for Ruby is an implementation of the MessagePack binary serialization format. Prior to 1.8.2, MessagePack::Buffer#clear in ext\/msgpack\/buffer.c leaves rmem_last, rmem_end, and rmem_owner stale after _msgpack_buffer_shift_chunk returns an rmem page to the shared pool, allowing a subsequent Buffer#write and a second &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-82749","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/82749","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/comments?post=82749"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/82749\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=82749"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=82749"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=82749"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}