Use After Free in Msgpack Msgpack-ruby
CVE-2026-54522
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…
Vulnerability class: Use-After-Free
Affected products
- Msgpack Msgpack-ruby — versions < 1.8.2
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)