New 28.1

Author: proxyles

_news/181.md

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+---
+layout: post
+id: 181
+title: "Erlang/OTP 28.1 Release"
+lead: "Erlang/OTP 28.1 is the first maintenance patch package for OTP 28, with mostly bug fixes."
+tags: "release, OTP, 28.1"
+date: "2025-09-17"
+author: "Henrik Nord"
+---
+## OTP 28.1
+
+Erlang/OTP 28.1 is the first maintenance patch package for OTP 28, with mostly bug fixes as well as improvements.
+
+
+### Potential incompatibilities:
+
+* The internal `inet_dns_tsig` and `inet_res` modules have been fixed to TSIG
+  verify the correct timestamp.
+  In the process two undocumented error code atoms have been corrected to
+  `notauth` and `notzone` to adhere to the DNS RFCs. Code that relied on the
+  previous incorrect values may have to be corrected.
+
+## HIGHLIGHTS
+
+* A User's Guide to `dbg` is now available in the documentation.
+* Support for quantum crypto signature algorithm ML-DSA (ssl and
+  public_key) and key exchange algorithm ML-KEM (ssl).
+
+* Support for ML-DSA and ML-KEM provided by OpenSSL 3.5 (crypto).
+
+  
+For details about bugfixes and potential incompatibilities see
+the [Erlang 28.1 README](https://erlang.org/download/OTP-28.1.README)
+
+The Erlang/OTP source can also be found at GitHub on the official Erlang repository,
+https://github.com/erlang/otp
+
+
+Download links for this and previous versions are found here:
+
+- [https://www.erlang.org/downloads](/downloads)