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.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| libp2p | rust-yamux | affected |
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Advisories
| Source | ID | Title |
|---|---|---|
 Github GHSA |
GHSA-vxx9-2994-q338 | Yamux vulnerable to remote Panic via malformed Data frame with SYN set and len = 262145 |
Fixes
Solution
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Workaround
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References
History
Fri, 13 Mar 2026 20:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Yamux remote Panic via malformed Data frame with SYN set and len = 262145 | |
| Weaknesses | CWE-248 | |
| References |
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| Metrics |
cvssV4_0
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Projects
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MITRE
Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-03-13T19:53:08.823Z
Reserved: 2026-03-11T21:16:21.660Z
Link: CVE-2026-32314
Vulnrichment
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NVD
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Redhat
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OpenCVE Enrichment
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Weaknesses