---
id: RUSTSEC-2026-0384
aliases:
  - GHSA-5wjr-9356-4wc8
title: 'Race condition in `tokio::time::Interval` on Tokio v1.54.0'
summary: 'Race condition in `tokio::time::Interval` on Tokio v1.54.0'
severity: none
vendor: tokio
product: tokio
ecosystem: rust
affected:
  - 'tokio >= 1.54.0, < 1.54.1'
patched:
  - tokio 1.54.1
published: '2026-10-21'
updated: '2026-10-22'
sourceUpdated: '2026-10-22T11:00:02.571101820Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/RUSTSEC-2026-0384'
references:
  - url: 'https://crates.io/crates/tokio'
  - url: 'https://rustsec.org/advisories/RUSTSEC-2026-0384.html'
  - url: 'https://github.com/tokio-rs/tokio/pull/8692'
tags:
  - osv
  - rust
ingestedAt: '2026-10-22T11:56:43.884Z'
---

## Overview

## Summary

On the multi-threaded runtime, there is a race condition between `Interval::poll_tick` and the runtime's time driver.

This affects `Interval` only. `Sleep` and `Timeout` are **not** affected.

## Details

In Tokio v1.54.0, a race condition between `tokio::time::Interval::poll_tick` (including `.tick().await`) and the runtime time driver can drop an internal timer entry without synchronizing with the driver thread that is firing it. This causes a data race and use-after-free on the timer's waker and task state in safe Rust, leading to assertion panics, task reference-count corruption, or heap memory corruption.

This bug was introduced by https://github.com/tokio-rs/tokio/pull/8458, and it was fixed by https://github.com/tokio-rs/tokio/pull/8692.

## Impact

This may lead to crashes and use-after-frees in applications using `Interval` on a multi-threaded runtime.

Since this issue is known to lead to crashes in production systems, the v1.54.0 release of Tokio has been yanked.

## Credits

Thank you to [creepycode](https://github.com/ByteZ1337) and [carabistouille](https://github.com/carabistouflette) for reporting this privately using the procedure outlined in our security policy. They both reported the issue independently of each other.

## Affected packages

- `tokio >= 1.54.0, < 1.54.1`

## Remediation

Upgrade to a patched release:

- `tokio 1.54.1`