CVE-2026-31814

HIGH

libp2p rust-yamux 0.13.0-0.13.8 - Unauthenticated Denial of Service via WindowUpdate Integer Overflow

Title source: llm
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v3 7.5
EPSS 0.0046
EPSS Percentile 36.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-190
Status published
Products (3)
crates.io/yamux 0.13.0 - 0.13.9crates.io
libp2p/rust-yamux >= 0.13.0, < 0.13.9
protocol/yamux 0.13.0 - 0.13.9
Published Mar 13, 2026
Tracked Since Mar 14, 2026