CVE-2026-31814

HIGH

7.5

Description

Yamux is a stream multiplexer over reliable, ordered connections such as TCP/IP. From 0.13.0 to before 0.13.9, a specially crafted WindowUpdate can cause arithmetic overflow in send-window accounting, which triggers a panic in the connection state machine. This is remotely reachable over a normal network connection and does not require authentication. This vulnerability is fixed in 0.13.9.

CVE Details

CVSS v3.1 Score7.5

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published3/13/2026

Last Modified3/19/2026

Sourcenvd

Honeypot Sightings0

Affected Products

protocol:yamux

Weaknesses (CWE)

CWE-190

References

https://github.com/libp2p/rust-yamux/security/advisories/GHSA-4w32-2493-32g7(security-advisories@github.com)

IOC Correlations

No correlations recorded

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