AIKIDO-2026-10900
ruby is vulnerable to Use-After-Free
75
High Risk
This Affects:
rubyTL;DR
Ruby contains a use-after-free vulnerability in the pthread-based getaddrinfo timeout handler used by Addrinfo.getaddrinfo(..., timeout:) and Socket.tcp(..., resolv_timeout:). A remote attacker able to delay DNS responses near the configured timeout may trigger a race condition causing the Ruby process to crash.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range.
Background info
ruby is vulnerable to Use-After-Free in versions 4.0.0 - 4.0.4.
How to fix this
Upgrade the ruby library to the patch version.
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