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.

Attack Vector Local

Attack Complexity High

Privileges Required Low

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
tokio-rs tokio affected
Version Status Constraints
= 1.54.0 affected —

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Advisories

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/tokio-rs/tokio/commit/2b4eba7833864c04ecd2f3e5f4a97ff4f6fa28d0 cve-icon cve-icon
https://github.com/tokio-rs/tokio/commit/5ed619bbaba87357ee5103d71b75e7c84cad99c9 cve-icon cve-icon
https://github.com/tokio-rs/tokio/pull/8458 cve-icon cve-icon
https://github.com/tokio-rs/tokio/pull/8692 cve-icon cve-icon
https://github.com/tokio-rs/tokio/releases/tag/tokio-1.54.1 cve-icon cve-icon
https://github.com/tokio-rs/tokio/security/advisories/GHSA-5wjr-9356-4wc8 cve-icon cve-icon
History

Fri, 23 Oct 2026 17:30:00 +0000

Type Values Removed Values Added
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.
Title Tokio: Race condition in `tokio::time::Interval`
Weaknesses CWE-362
References
Metrics cvssV4_0

{'score': 5.8, 'vector': 'CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-10-23T17:13:16.161Z

Reserved: 2026-10-22T22:53:15.237Z

Link: CVE-2026-115567

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-23T18:17:21.303

Modified: 2026-10-23T19:42:24.553

Link: CVE-2026-115567

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-23T19:30:18Z

Weaknesses