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CVE-2026-32314

Yamux remote Panic via malformed Data frame with SYN set and len = 262145

Published: Mar 13, 2026Updated: Mar 19, 2026 Sources: CVE List NVD GHSA BDUCWE-248
NVD MITRE
7.5CVSSHIGH
EPSS Score
0.5%
Top 64.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-248

Affected Products

rust-yamuxlibp2p
Library
OSS Libraries / generic-library
YamuxСообщество свободного программного обеспечения
On-prem
Operating Systems / linux-distro
yamuxprotocol
Mixed
OSS Libraries / generic-library
yamuxcrates.ioOSS Libraries
libp2poss-projectOSS Librariesaka rust-libp2p, go-libp2p, rust-yamux
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf
protocoloss-projectOSS Librariesaka libp2p, go-ipfs, go-ipld-prime, protocol labs
crates.iopackage-ecosystemOSS Libraries

Exploitability

Official Patch Available

References

https://github.com/libp2p/rust-yamux/security/advisories/GHSA-vxx9-2994-q338
github.com
https://nvd.nist.gov/vuln/detail/CVE-2026-32314
nvd.nist.gov
https://github.com/libp2p/rust-yamux
github.com

Timeline

Published
Mar 13, 2026
Last Updated
Mar 19, 2026

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