CVE-2026-115567

5.8 MEDIUM 0.1% exploit odds Fix listed Memory safety Library

What it is

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.

At a glance

Exploitability: Can be exploited locally on the machine with a low-privilege account. High risk of service disruption.
Exploit odds: 0.1% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2026-10-22 22:53 UTC ReservedThe CVE id was reserved by its CNA
2026-10-23 18:17 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-10-29 18:17 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 0.1% in the next 30 days (EPSS).
Severity: 5.8 MEDIUM (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2026-10-23 18:17 UTC
Last modified: 2026-10-29 18:17 UTC
Exploit probability: 0.1% · EPSS, next 30 days
Weakness: CWE-362 · Race condition
Record status: Awaiting Analysis

Attack profile CVSS 4.0 · 5.8

Attack vector: Local
Complexity: High
Attack requirements: Present
Privileges needed: Low
User interaction: None
Confidentiality: None
Integrity: Low
Availability: High

Raw 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2026-115567.md and follow it. Check whether this project is affected by CVE-2026-115567. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record