CVE-2026-1677

{"id": "CVE-2026-1677", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-1677", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-05-11T16:31:12.694213Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "vulnerabilities@zephyrproject.org", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 1.4, "exploitabilityScore": 3.9}]}, "affected": [{"source": "vulnerabilities@zephyrproject.org", "affectedData": [{"repo": "https://github.com/zephyrproject-rtos/zephyr", "vendor": "zephyrproject-rtos", "product": "Zephyr", "versions": [{"status": "affected", "version": "*", "lessThan": "4.4.0", "versionType": "git"}], "packageName": "Zephyr", "defaultStatus": "unaffected"}]}], "published": "2026-05-11T06:16:08.683", "references": [{"url": "https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-23r2-m5wx-4rvq", "tags": ["Exploit", "Mitigation", "Patch", "Vendor Advisory"], "source": "vulnerabilities@zephyrproject.org"}, {"url": "https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-23r2-m5wx-4rvq", "tags": ["Exploit", "Mitigation", "Patch", "Vendor Advisory"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "vulnerabilities@zephyrproject.org", "description": [{"lang": "en", "value": "CWE-757"}]}, {"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "Zephyr sockets created with `IPPROTO_TLS_1_3` can still negotiate a TLS 1.2 connection when both TLS versions are enabled in Kconfig, because the socket-level protocol selection is not propagated to mbedTLS (e.g. via `mbedtls_ssl_conf_min_tls_version`). The ClientHello advertises both versions and the peer can establish TLS 1.2, so applications that assumed `IPPROTO_TLS_1_3` enforces TLS 1.3 may silently use TLS 1.2 and remain exposed to TLS 1.2-specific weaknesses. As a workaround, the `TLS_CIPHERSUITE_LIST` socket option can be restricted to TLS 1.3-only cipher suites."}, {"lang": "es", "value": "Los sockets de Zephyr creados con \u201cIPPROTO_TLS_1_3\u201d a\u00fan pueden negociar una conexi\u00f3n TLS 1.2 cuando ambas versiones de TLS est\u00e1n habilitadas en Kconfig, porque la selecci\u00f3n de protocolo a nivel de socket no se propaga a mbedTLS (por ejemplo, a trav\u00e9s de \u201cmbedtls_ssl_conf_min_tls_version\u201d). El ClientHello anuncia ambas versiones y el par puede establecer TLS 1.2, por lo que las aplicaciones que asumieron que \u201cIPPROTO_TLS_1_3\u201d impone TLS 1.3 pueden usar silenciosamente TLS 1.2 y permanecer expuestas a debilidades espec\u00edficas de TLS 1.2. Como soluci\u00f3n alternativa, la opci\u00f3n de socket \u201cTLS_CIPHERSUITE_LIST\u201d puede restringirse a suites de cifrado solo de TLS 1.3."}], "lastModified": "2026-10-26T18:10:00.173", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:zephyrproject:zephyr:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7D912614-A39E-4C9B-AA54-187BC26337B9", "versionEndIncluding": "4.3.0"}], "operator": "OR"}]}], "sourceIdentifier": "vulnerabilities@zephyrproject.org"}