CVE-2026-31814 — Yamux remote Panic via malformed WindowUpdate credit

CVE-2026-31814

Yamux remote Panic via malformed WindowUpdate credit PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
libp2p / rust-yamux	affected >= 0.13.0, < 0.13.9

CWE

CWE-190

References

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

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.