CVE-2026-115567

Tokio: Race condition in `tokio::time::Interval`

MEDIUM
5.8
CVSS Score
Published: October 23, 2026 at 05:13 PM UTC
Updated: October 29, 2026 at 06:17 PM UTC
1 product affected across 1 vendorTokio

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Severity
MEDIUM5.8
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

= 1.54.0

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.8MEDIUMGitHub_M
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-362

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