https://github.com/erlang/otp/security/advisories/GHSA-r5jr-mq46-vmhw reports:
A TLS/DTLS peer can crash the remote node by sending a
certificate chain containing two mutually cross-signed
certificates in unordered form. When the receiving side
attempts to build a valid chain path, it enters unbounded
recursion between the two certificates (A issues B, B issues
A) with no cycle detection or depth limit. The call stack and
chain accumulator grow without bound until the process
exhausts available memory and the BEAM node crashes.