medium5.8
CVE-2026-115567
Tokio is a runtime for writing applications with Rust.
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| rust | tokio | = 1.54.0 | 1.54.1 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-5wjr-9356-4wc8
- https://github.com/tokio-rs/tokio/security/advisories/GHSA-5wjr-9356-4wc8
- https://nvd.nist.gov/vuln/detail/CVE-2026-115567
- https://github.com/tokio-rs/tokio/pull/8458
- https://github.com/tokio-rs/tokio/pull/8692
- https://github.com/tokio-rs/tokio/commit/2b4eba7833864c04ecd2f3e5f4a97ff4f6fa28d0
- https://github.com/tokio-rs/tokio/commit/5ed619bbaba87357ee5103d71b75e7c84cad99c9
- https://github.com/tokio-rs/tokio/releases/tag/tokio-1.54.1
- https://rustsec.org/advisories/RUSTSEC-2026-0384.html