CVE-2026-32314
Yamux remote Panic via malformed Data frame with SYN set and len = 262145
Yamux is a stream multiplexer over reliable, ordered connections such as TCP/IP. Prior to 0.13.10, the Rust implementation of Yamux can panic when processing a crafted inbound Data frame that sets SYN and uses a body length greater than DEFAULT_CREDIT (e.g. 262145). On the first packet of a new inbound stream, stream state is created and a receiver is queued before oversized-body validation completes. When validation fails, the temporary stream is dropped and cleanup may call remove(...).expect("stream not found"), triggering a panic in the connection state machine. This is remotely reachable over a normal Yamux session and does not require authentication. This vulnerability is fixed in 0.13.10.
| CWE | CWE-248 |
| Vendor | libp2p |
| Product | rust-yamux |
| Published | Mar 13, 2026 |
| Last Updated | Mar 16, 2026 |
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