FIND-20260409-001 · 2026-04-09 · Innovation Veille
Tokio 1.51.1 — LTS release with semaphore fix and UDP improvements
release
HIGH
Tokio 1.51.x is now an LTS release (until March 2027, MSRV 1.71). Version 1.51.1 published April 8 2026 fixes a semaphore edge-case bug, improves UDP socket error handling on Linux, and adds unstable io_uring metrics improvements. LTS designation means the ODS Rust services using tokio 1.x will receive security and critical bug fixes without major version churn through 2027.
Source
https://github.com/tokio-rs/tokio/releases/tag/tokio-1.51.1
ODS Impact
All ODS Rust backend services (oid, docstore, pdf-engine, billing-engine, notification-hub, workflow-engine) depend on Tokio as their async runtime. LTS status reduces upgrade risk. Recommended: pin to tokio = '1.51' in Cargo.toml and update CI. The semaphore fix may affect concurrency-heavy services like the PDF Engine and Workflow Engine.
Security Review
License: MIT | Maintenance: ACTIVE | Risk: LOW | Recommendation: SAFE_TO_USE
Tags
rust
tokio
async
runtime
lts
release