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CVE-2026-115567— Tokio: Race condition in `tokio::time::Interval`

Quick assessment

Affected
tokio-rs tokio
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Tokio 是一个用于使用 Rust 编写应用程序的运行时环境。在版本 1.54.0 中， （包括 ）与多线程运行时中的时间驱动组件之间存在竞态条件，导致内部定时器条目在未与正在触发该定时器的驱动线程进行同步的情况下被丢弃。该竞态条件在安全 Rust 代码中引发了定时器唤醒器（waker）和任务状态的释放后使用（use-after-free）问题，可能引发断言恐慌（assertion panic）、任务引用计数损坏或堆内存损坏。此问题已在版本 1.54.1 中修复。

CVSS 5.8 · Medium

Affected Version Matrix 1

VendorProduct Version RangeStatus
tokio-rs tokio = 1.54.0 affected
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I. Basic Information for CVE-2026-115567

Vulnerability Information
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Vulnerability Title
Tokio: Race condition in `tokio::time::Interval`
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
使用共享资源的并发执行不恰当同步问题(竞争条件)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
tokio-rs tokio = 1.54.0 -

II. Public POCs for CVE-2026-115567

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III. Intelligence Information for CVE-2026-115567

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Patches & Fixes for CVE-2026-115567 (3)

Vendor Advisories for CVE-2026-115567 (1)

Vendor Pages for CVE-2026-115567 (1)

IV. Related Vulnerabilities

Same product: tokio
Same vendor: tokio-rs
Same weakness: CWE-362

V. Comments for CVE-2026-115567

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