Patch Package:           OTP 28.0.1
Git Tag:                 OTP-28.0.1
Date:                    2025-06-16
Trouble Report Id:       OTP-19634, OTP-19635, OTP-19637, OTP-19638,
                         OTP-19641, OTP-19644, OTP-19645, OTP-19650,
                         OTP-19653, OTP-19658, OTP-19662, OTP-19665,
                         OTP-19675, OTP-19676
Seq num:                 CVE-2025-4748, ERIERL-1225, ERIERL-1235,
                         GH-6463, GH-9102, GH-9841, GH-9858, GH-9863,
                         GH-9872, PR-9103, PR-9691, PR-9838, PR-9846,
                         PR-9849, PR-9859, PR-9861, PR-9870, PR-9878,
                         PR-9880, PR-9892, PR-9905, PR-9926, PR-9941
System:                  OTP
Release:                 28
Application:             asn1-5.4.1, debugger-6.0.1, eldap-1.2.16,
                         erts-16.0.1, kernel-10.3.1,
                         public_key-1.18.1, ssh-5.3.1, ssl-11.3.1,
                         stdlib-7.0.1, xmerl-2.1.5
Predecessor:             OTP 28.0

Check out the git tag OTP-28.0.1, and build a full OTP system including
documentation. Apply one or more applications from this build as patches to your
installation using the ‘otp_patch_apply’ tool. For information on install
requirements, see descriptions for each application version below.

asn1-5.4.1

The asn1-5.4.1 application can be applied independently of other applications on
a full OTP 28 installation.

Fixed Bugs and Malfunctions

• The ASN.1 compiler could generate code that would cause Dialyzer with the
  unmatched_returns option to emit warnings.

  Own Id: OTP-19638
  Related Id(s): GH-9841, PR-9846

Full runtime dependencies of asn1-5.4.1

erts-14.0, kernel-9.0, stdlib-5.0

debugger-6.0.1

The debugger-6.0.1 application can be applied independently of other
applications on a full OTP 28 installation.

Fixed Bugs and Malfunctions

• Restore deleted icon so that debugger does not crash on startup.

  Own Id: OTP-19641
  Related Id(s): GH-9858, PR-9861

Full runtime dependencies of debugger-6.0.1

compiler-8.0, erts-15.0, kernel-10.0, stdlib-7.0, wx-2.0

eldap-1.2.16

The eldap-1.2.16 application can be applied independently of other applications
on a full OTP 28 installation.

Fixed Bugs and Malfunctions

• With this change eldap’s ‘not’ function will have specs fixed.

  Own Id: OTP-19658
  Related Id(s): PR-9859

Full runtime dependencies of eldap-1.2.16

asn1-3.0, erts-6.0, kernel-3.0, ssl-5.3.4, stdlib-3.4

erts-16.0.1

The erts-16.0.1 application can be applied independently of other applications
on a full OTP 28 installation.

Fixed Bugs and Malfunctions

• Fix Erlang to not crash when io:standard_error/0 is a terminal but
  io:standard_io/0 is not. This bug has existed since Erlang/OTP 28.0 and only
  effects Windows.

  Own Id: OTP-19650
  Related Id(s): GH-9872, PR-9878

• In a debug build, the BIFs for the native debugger could cause a lock order
  violation diagnostic from the lock checker.

  Own Id: OTP-19665
  Related Id(s): PR-9926

• When building ERTS make sure correct pcre2.h file is included even if CFLAGS
  contains extra include paths.

  Own Id: OTP-19675
  Related Id(s): PR-9892

Full runtime dependencies of erts-16.0.1

kernel-9.0, sasl-3.3, stdlib-4.1

kernel-10.3.1

The kernel-10.3.1 application can be applied independently of other applications
on a full OTP 28 installation.

Fixed Bugs and Malfunctions

• Fix bug where calling io:setopts/1 in a shell without the line_history
  option would always disable line_history. This bug was introduced in
  Erlang/OTP 28.0.

  Own Id: OTP-19645
  Related Id(s): GH-9863, PR-9870

Full runtime dependencies of kernel-10.3.1

crypto-5.0, erts-15.2.5, sasl-3.0, stdlib-6.0

public_key-1.18.1

The public_key-1.18.1 application can be applied independently of other
applications on a full OTP 28 installation.

Fixed Bugs and Malfunctions

• Add back some ASN-1 macros and definitions that should be included in API.

  Own Id: OTP-19644
  Related Id(s): PR-9880

Full runtime dependencies of public_key-1.18.1

asn1-5.0, crypto-5.0, erts-13.0, kernel-8.0, stdlib-4.0

ssh-5.3.1

The ssh-5.3.1 application can be applied independently of other applications on
a full OTP 28 installation.

Fixed Bugs and Malfunctions

• Various channel closing robustness improvements. Avoid crashes when channel
  handling process closes channel and immediately exits. Avoid breaking the
  protocol by sending duplicated channel-close messages. Cleanup channels which
  timeout during closing procedure.

  Own Id: OTP-19634
  Related Id(s): GH-9102, PR-9103

• Improved interoperability with clients acting as Paramiko.

  Own Id: OTP-19637
  Related Id(s): GH-6463, PR-9838

Full runtime dependencies of ssh-5.3.1

crypto-5.0, erts-14.0, kernel-10.3, public_key-1.6.1, runtime_tools-1.15.1,
stdlib-5.0, stdlib-6.0

ssl-11.3.1

The ssl-11.3.1 application can be applied independently of other applications on
a full OTP 28 installation.

Fixed Bugs and Malfunctions

• hs_keylog callback properly handle alert in initial states, where encryption
  is not yet used. Also add keylog callback invocation for corner-case where
  server alert is encrypted with application secrets as client is already in
  connection state.

  Own Id: OTP-19635
  Related Id(s): ERIERL-1235, PR-9849

Improvements and New Features

• The documentation for SSL option verify_fun has been improved.

  Own Id: OTP-19676
  Related Id(s): PR-9691

Full runtime dependencies of ssl-11.3.1

crypto-5.6, erts-16.0, inets-5.10.7, kernel-10.3, public_key-1.16.4,
runtime_tools-1.15.1, stdlib-7.0

stdlib-7.0.1

The stdlib-7.0.1 application can be applied independently of other applications
on a full OTP 28 installation.

Fixed Bugs and Malfunctions

• Properly strip the leading / and drive letter from filepaths when zipping
  and unzipping archives.

  Thanks to Wander Nauta for finding and responsibly disclosing this
  vulnerability to the Erlang/OTP project.

  Own Id: OTP-19653
  Related Id(s): PR-9941, CVE-2025-4748

Full runtime dependencies of stdlib-7.0.1

compiler-5.0, crypto-4.5, erts-16.0, kernel-10.0, sasl-3.0, syntax_tools-3.2.1

xmerl-2.1.5

The xmerl-2.1.5 application can be applied independently of other applications
on a full OTP 28 installation.

Fixed Bugs and Malfunctions

• The type specs of xmerl_scan:file/2 and xmerl_scan:string/2 has been
  updated to return dynamic/0. Due to hook functions they can return any user
  defined term.

  Own Id: OTP-19662
  Related Id(s): ERIERL-1225, PR-9905

Full runtime dependencies of xmerl-2.1.5

erts-6.0, kernel-8.4, stdlib-2.5

Thanks to

Dan Janowski, Ilya Averyanov, Mikael Pettersson, Yaroslav Maslennikov

Original announcement: