Patch Package:           OTP 28.5.0.5
Git Tag:                 OTP-28.5.0.5
Date:                    2026-08-04
Trouble Report Id:       OTP-20137, OTP-20275
Seq num:                 GH-11402, PR-11110, PR-11409
System:                  OTP
Release:                 28
Application:             erts-16.4.0.5, ssh-5.5.2.4
Predecessor:             OTP 28.5.0.4

Check out the git tag OTP-28.5.0.5, 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.

erts-16.4.0.5

The erts-16.4.0.5 application can be applied independently of other applications
on a full OTP 28 installation.

Fixed Bugs and Malfunctions

• Fixed a regression in the previous patch release that prevented epmd from
  binding to localhost.

  Own Id: OTP-20275
  Related Id(s): GH-11402, PR-11409

Full runtime dependencies of erts-16.4.0.5

kernel-9.0, sasl-3.3, stdlib-4.1

ssh-5.5.2.4

Note! The ssh-5.5.2.4 application cannot be applied independently of other
applications on an arbitrary OTP 28 installation.

   On a full OTP 28 installation, also the following runtime
   dependency has to be satisfied:
   -- crypto-5.7 (first satisfied in OTP 28.1)

Fixed Bugs and Malfunctions

• The SSH client and server now reject incoming packets not aligned to the
  cipher block size as required by RFC 4253 §6. For CBC ciphers, a timing-safe
  “packet discard” mechanism (CVE-2008-5161 mitigation) ensures structural
  errors are indistinguishable from MAC failures before disconnecting. AEAD and
  encrypt-then-MAC modes disconnect immediately.

  Own Id: OTP-20137
  Related Id(s): PR-11110

Full runtime dependencies of ssh-5.5.2.4

crypto-5.7, erts-14.0, kernel-10.3, public_key-1.6.1, runtime_tools-1.15.1,
stdlib-5.0, stdlib-6.0

Original announcement: