Integer overflow in Libp2p Rust-yamux

CVE-2026-31814

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 connecti…

Vulnerability class: Integer Overflow

EPSS: 0.000 (10.8th percentile) — read the EPSS interpretation.

Affected products

Libp2p Rust-yamux — versions >= 0.13.0, < 0.13.9

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

References

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