CVE-2026-115567

Description

Tokio is a runtime for writing applications with Rust. In 1.54.0, a race condition between tokio::time::Interval::poll_tick (including .tick().await) and the multi-threaded runtime's time driver could drop an internal timer entry without synchronizing with the driver thread that was firing it. The race caused a use-after-free on the timer's waker and task state in safe Rust, which could produce assertion panics, task reference-count corruption, or heap memory corruption. This issue is fixed in 1.54.1.

References

https://github.com/tokio-rs/tokio/security/advisories/GHSA-5wjr-9356-4wc8

https://github.com/tokio-rs/tokio/releases/tag/tokio-1.54.1

https://github.com/tokio-rs/tokio/pull/8692

https://github.com/tokio-rs/tokio/pull/8458

https://github.com/tokio-rs/tokio/commit/5ed619bbaba87357ee5103d71b75e7c84cad99c9

https://github.com/tokio-rs/tokio/commit/2b4eba7833864c04ecd2f3e5f4a97ff4f6fa28d0

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-109110

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

CVSS v4