CVE-2026-32314
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.
Scoring
- Severity
- HIGH
- CVSS base score
- 8.7
- CVSS vector
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- EPSS probability
- 0.45%
- CWE
- CWE-248
- Published
- 2026-03-13
- Last modified
- 2026-03-16
Affected products
- libp2p rust-yamux
Weakness type
Related vulnerabilities
- CVE-2026-87123 — hbs vulnerable to Denial of Service via unhandled exception in async helper output escaping
- CVE-2026-88015 — rclone local: crafted Range request against a translated symlink panics (DoS)
- CVE-2026-69839 — Windows iSCSI Target Service Denial of Service Vulnerability
- CVE-2026-82058 — Unhandled Exception in MongoDB Server JSON Schema Validation Error Generation Leads to Denial of Service
- CVE-2022-51014 — PocketMine-MP before 4.0.7 Denial of Service via JSON Decoding
- CVE-2022-51009 — PocketMine-MP before 4.7.2 Denial of Service via Skin Geometry
- CVE-2026-19534 — undici vulnerable to Denial of Service via unrequested WebSocket subprotocol
- CVE-2026-84947 — undici vulnerable to response truncation via oversized chunked responses in the dump interceptor