CVE-2026-32314

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{"affected": [{"affectedData": [{"product": "rust-yamux", "vendor": "libp2p", "versions": [{"status": "affected", "version": "< 0.13.10"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:protocol:yamux:*:*:*:*:*:rust:*:*", "matchCriteriaId": "85CB9FF6-BE41-4864-86B3-E85803159E91", "versionEndExcluding": "0.13.10", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Yamux es un multiplexor de flujo sobre conexiones fiables y ordenadas como TCP/IP. Antes de la versi\u00f3n 0.13.10, la implementaci\u00f3n en Rust de Yamux puede entrar en p\u00e1nico al procesar un marco de datos de entrada manipulado que establece SYN y utiliza una longitud de cuerpo mayor que DEFAULT_CREDIT (p. ej., 262145). En el primer paquete de un nuevo flujo de entrada, se crea el estado del flujo y se encola un receptor antes de que se complete la validaci\u00f3n del cuerpo de tama\u00f1o excesivo. Cuando la validaci\u00f3n falla, el flujo temporal se descarta y la limpieza puede llamar a remove(...).expect('stream not found'), lo que desencadena un p\u00e1nico en la m\u00e1quina de estados de la conexi\u00f3n. Esto es accesible remotamente a trav\u00e9s de una sesi\u00f3n Yamux normal y no requiere autenticaci\u00f3n. Esta vulnerabilidad se corrige en la versi\u00f3n 0.13.10."}], "id": "CVE-2026-32314", "lastModified": "2026-06-17T10:35:32.927", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.7, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-32314", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-16T13:47:55.471147Z", "version": "2.0.3"}}]}, "published": "2026-03-16T14:19:34.030", "references": [{"source": "security-advisories@github.com", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/libp2p/rust-yamux/security/advisories/GHSA-vxx9-2994-q338"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-248"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,0.13.10)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "rust-yamux", "source": "cna", "vendor": "libp2p"}, "product": "rust-yamux", "vendor": "libp2p"}], "analysis": {"en": {"generated_at": "2026-03-19T16:06:45.150522+00:00", "value": {"mitigation_remediation": ["Apply patch: upgrade libp2p rust\u2011yamux to version 0.13.10 or newer (key detail from vendor advisory: upgrade recommended).", "Verify that the library version is at least 0.13.10 and restart the service to ensure the patch is active (key detail from vendor advisory: restart may be required).", "Monitor application logs for unexpected crashes and verify that the service remains operational (key detail from vendor advisory: ongoing monitoring is recommended)."], "summary": {"action": "Patch", "impact": "Denial of Service"}, "threat_synthesis": {"affected_systems": "Affected vendor: libp2p:rust\u2011yamux. All releases prior to 0.13.10 are impacted regardless of configuration. The issue is specific to the Rust implementation; other language bindings are not affected. Key detail from vendor advisory: affected products and versions.", "description_and_impact": "Yamux is a stream multiplexer used over reliable, ordered connections such as TCP/IP. The Rust implementation before version 0.13.10 contains a flaw that can cause a panic when processing a crafted inbound Data frame that sets the SYN flag and specifies a body length greater than the maximum credit limit (262,145 bytes). This occurs during the creation of a new stream: the stream state is instantiated and a receiver is queued before oversized\u2011body validation completes. If validation fails, the temporary stream is dropped and cleanup attempts to remove a non\u2011existent stream, triggering an unrecoverable panic in the connection state machine. The result is a crash of the process that hosts the Yamux connection, leading to a denial\u2011of\u2011service condition (CWE\u2011248). Key detail from vendor advisory: the flaw is due to improper handling of buffer size.", "risk_and_exploitability": "The CVSS score is 8.7 indicating high severity; the EPSS score is below 1%, suggesting current exploitation likelihood is low, and the vulnerability is not listed in the CISA KEV catalog. Attack is remotely reachable over a normal Yamux session and does not require authentication. An adversary can send a malicious Data frame to a running Yamux service, causing a process crash and potential denial of service. Key detail from vendor advisory: exposure is remote, no authentication required."}}}}, "created": "2026-03-16T09:24:06.628401+00:00", "updated": "2026-03-23T13:40:05.982548+00:00", "vendors": ["libp2p", "libp2p$PRODUCT$rust-yamux"]}