libp2p rust-yamux up to 0.13.9 uncaught exception

Summaryinfo

A vulnerability classified as problematic has been found in libp2p rust-yamux up to 0.13.9. This vulnerability affects unknown code. The manipulation leads to uncaught exception. This vulnerability is referenced as CVE-2026-32314. Remote exploitation of the attack is possible. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in libp2p rust-yamux up to 0.13.9. It has been rated as problematic. This issue affects some unknown processing. The manipulation with an unknown input leads to a uncaught exception vulnerability. Using CWE to declare the problem leads to CWE-248. An exception is thrown from a function, but it is not caught. Impacted is availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-32314 since 03/11/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 302263 (Linux Distros Unpatched Vulnerability : CVE-2026-32314), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 0.13.10 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (302263) and EUVD (EUVD-2026-12095). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• libp2p

Name

• rust-yamux

Version

• 0.13.0
• 0.13.1
• 0.13.2
• 0.13.3
• 0.13.4
• 0.13.5
• 0.13.6
• 0.13.7
• 0.13.8
• 0.13.9

Website

• Product: https://github.com/libp2p/rust-yamux/

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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