This release of Erlang/OTP can be built from source or installed using pre-built packages for your OS or third-party tools (such as kerl or asdf).

docker run -it erlang:
Patch Package OTP
Git Tag OTP-
Date 2020-02-03
Issue Id
System OTP
Release 21

erts- #

Note! The erts- application *cannot* be applied independently of other applications on an arbitrary OTP 21 installation. On a full OTP 21 installation, also the following runtime dependencies have to be satisfied: -- kernel-6.1 (first satisfied in OTP 21.1) -- sasl-3.3 (first satisfied in OTP 21.2)

Related Id(s):

A process could end up in a state where it got endlessly rescheduled without making any progress. This occurred when a system task, such as check of process code (part of a code purge), was scheduled on a high priority process trying to execute on a dirty scheduler.


Fixed bug in erlang:list_to_ref/1 when called with a reference created by a remote note. Function list_to_ref/1 is intended for debugging and not to be used in application programs. Bug exist since OTP 20.0.

Full runtime dependencies of erts- kernel-6.1, sasl-3.3, stdlib-3.5

stdlib- #

The stdlib- application can be applied independently of other applications on a full OTP 21 installation.


A directory traversal vulnerability has been eliminated in erl_tar. erl_tar will now refuse to extract symlinks that points outside the targeted extraction directory and will return {error,{Path,unsafe_symlink}}. (Thanks to Eric Meadows-J├Ânsson for the bug report and for suggesting a fix.)

Full runtime dependencies of stdlib- compiler-5.0, crypto-3.3, erts-10.0, kernel-6.0, sasl-3.0