How to install openssl35-libs on Ubuntu

Shared libraries for openssl35 (OpenSSL 3.5 LTS with ECH)

Vendor: GetPageSpeed LLC https://github.com/openssl/openssl

Availability

Compare package tracks by distribution and architecture. Checkmarks show the architectures available in each repository channel.

Distro	Channel	Version
Ubuntu 26.04 (resolute)	Base	3.5.8
Ubuntu 24.04 (noble)	Base	3.5.8
Ubuntu 22.04 (jammy)	Base	3.5.8
Ubuntu 20.04 (focal)	Base	3.5.8

Description

An ABI-isolated build of the OpenSSL 3.5 LTS line carrying the Encrypted Client Hello (ECH, RFC 9849) backport from the DEfO project, plus TLS certificate compression (zlib, brotli, zstd), kTLS and post-quantum key exchange (X25519MLKEM768). It is installed alongside the system OpenSSL and does not replace libssl3. This package provides the shared libraries libssl.so.35.3 and libcrypto.so.35.3, along with engine and provider modules, installed under /usr/lib//openssl35/. The renamed SONAMEs guarantee a process can never accidentally resolve these symbols against the system libssl.so.3, even when both are loaded. An ld.so.conf.d snippet is shipped so the runtime linker can find them without rpath.

Built for Ubuntu.

Install

Base Ubuntu 20.04, 22.04, 24.04, 26.04

openssl35-libs on Ubuntu 20.04 (focal), 22.04 (jammy), 24.04 (noble), 26.04 (resolute)

curl -fsSL https://extras.getpagespeed.com/release-latest.deb -o /tmp/getpagespeed-release.deb
sudo apt-get install -y /tmp/getpagespeed-release.deb
rm /tmp/getpagespeed-release.deb
sudo apt-get update
sudo apt-get install -y openssl35-libs

Frequently asked questions

How do I install openssl35-libs on Ubuntu?

Add the GetPageSpeed repository, then install the openssl35-libs package with your system package manager.

Which Ubuntu versions is openssl35-libs available for?

openssl35-libs is available for Ubuntu 20.04, 22.04, 24.04, 26.04.