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On April 8th, 2025 OpenSSL 3.5 was released, the latest OpenSSL LTS: https://openssl-library.org/post/2025-04-08-openssl-35-final-release/
Here is a table of the OpenSSL release roadmap and deprecation schedule from1:
| Version | Release Type | Release Date | Supported Until |
|---|---|---|---|
| 3.0 | LTS | Sep 2021 | Sep 2026 |
| 3.1 | Non-LTS | Mar 2023 | Mar 2025 |
| 3.2 | Non-LTS | Nov 2023 | Nov 2025 |
| 3.3 | Non-LTS | Apr 2024 | Apr 2026 |
| 3.4 | Non-LTS | Oct 2024 | Oct 2026 |
| 3.5 | LTS | Apr 2025 | Apr 2030 |
| 3.6 | Non-LTS | Oct 2025 | Nov 2026 |
| 4.0 | Non-LTS | Apr 2026 | May 2027 |
OpenSSL 3.5 is the only version with free public support beyond 2026, and lining up this with the Python release schedules, it looks like ideally 3.11—3.14 would all support OpenSSL 3.5 to overlap the OpenSSL window. I haven't assessed how complicated the internal changes, but wanted to start the process based on the discussion in #131423.
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The build process and cross-buildThe build process and cross-buildC modules in the Modules dirC modules in the Modules dirA feature request or enhancementA feature request or enhancementA security issueA security issue