CLEANSTART-2026-ES40374 Security fix for CVE-2026-54522 applied in: ruby-fluentd-1.18 1.18.0-r5

Security vulnerability affects the ruby-fluentd-1.18 package. This issue is resolved in later releases. See references for vulnerability details...

CVE-2026-54522 affecting package rubygem-msgpack for versions less than 1.8.4-1

CVE-2026-54522 affecting package rubygem-msgpack for versions less than 1.8.4-1. An upgraded version of the package is available that resolves this issue...

OESA-2026-3221 rubygem-msgpack security update

MessagePack is a binary-based efficient object serialization library. It enables to exchange structured objects between many languages like JSON. But unlike JSON, it is very fast and small. Security Fixes: Affected versions of this package are vulnerable to Use After Free in the clear function. A...

OESA-2026-3219 rubygem-msgpack security update

MessagePack is a binary-based efficient object serialization library. It enables to exchange structured objects between many languages like JSON. But unlike JSON, it is very fast and small. Security Fixes: Affected versions of this package are vulnerable to Use After Free in the clear function. A...

UBUNTU-CVE-2026-54522

MessagePack for Ruby is an implementation of the MessagePack binary serialization format. Prior to 1.8.2, MessagePack::Bufferclear in ext/msgpack/buffer.c leaves rmemlast, rmemend, and rmemowner stale after msgpackbuffershiftchunk returns an rmem page to the shared pool, allowing a subsequent...