Medium 5.8Published Oct 23, 2026

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

Updated under an hour ago (Oct 28, 2026, 4:10 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for tokio-rs tokio

Exploited in the last 30 days

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.

CVSS: 5.8 MEDIUM (v4.0, CNA)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
Weakness (CWE): CWE-362
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Awaiting Analysis
Record last updated: Oct 23, 2026
First seen by InfoSec Signals: Oct 23, 2026

Affected products

Affected products

tokio-rs tokio tokio_rs:tokio (from the name)	= 1.54.0	CNA record

References

References

https://github.com/tokio-rs/tokio/security/advisories/GHSA-5wjr-9356-4wc8	x-refsource-confirm
https://github.com/tokio-rs/tokio/pull/8458	x-refsource-misc
https://github.com/tokio-rs/tokio/pull/8692	x-refsource-misc
https://github.com/tokio-rs/tokio/commit/2b4eba7833864c04ecd2f3e5f4a97ff4f6fa28d0	x-refsource-misc
https://github.com/tokio-rs/tokio/commit/5ed619bbaba87357ee5103d71b75e7c84cad99c9	x-refsource-misc
https://github.com/tokio-rs/tokio/releases/tag/tokio-1.54.1	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.