{"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","slug":"RUSTSEC-2026-0384","body":"## Overview\n\n## Summary\n\nOn the multi-threaded runtime, there is a race condition between `Interval::poll_tick` and the runtime's time driver.\n\nThis affects `Interval` only. `Sleep` and `Timeout` are **not** affected.\n\n## Details\n\nIn 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.\n\nThis 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.\n\n## Impact\n\nThis may lead to crashes and use-after-frees in applications using `Interval` on a multi-threaded runtime.\n\nSince this issue is known to lead to crashes in production systems, the v1.54.0 release of Tokio has been yanked.\n\n## Credits\n\nThank 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.\n\n## Affected packages\n\n- `tokio >= 1.54.0, < 1.54.1`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `tokio 1.54.1`","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}