{"id":"CVE-2026-103415","revision":"cd6be82b086f4e2dac164208b553f8d5","records":[{"revision":"cd6be82b086f4e2dac164208b553f8d5","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-103415","aliases":[],"title":"When a TLS 1.3 client processes a HelloRetryRequest, it copies the server's cookie into its second ClientHello without checking that the cookie fits in the outgoing packet. Both the length and the contents of that cookie come from the peer,…","description":"When a TLS 1.3 client processes a HelloRetryRequest, it copies the server's cookie into its second ClientHello without checking that the cookie fits in the outgoing packet. Both the length and the contents of that cookie come from the peer, and the write happens before certificate authentication completes, so a malicious or compromised server can overwrite memory past the caller supplied TLS packet buffer without presenting a certificate.\n\n\n\nOnly the client path is affected.","state":0,"publishedAt":"2026-10-14T17:36:17.62+00:00","modifiedAt":"2026-10-16T20:12:39.252+00:00","affected":[{"ecosystem":"Vendor product","name":"NetX Duo","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Eclipse Foundation\",\n                    \"product\": \"NetX Duo\",\n                    \"packageName\": \"NetX Duo\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"lessThanOrEqual\": \"6.5.1.202602\",\n                            \"versionType\": \"custom\"\n                        },\n                        {\n                            \"status\": \"unaffected\",\n                            \"version\": \"6.5.2.202603\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","score":9.3,"severity":"CRITICAL"}],"references":["https://github.com/eclipse-threadx/netxduo/security/advisories/GHSA-5pv3-rhf5-gwgq","https://gitlab.eclipse.org/security/cve-assignment/-/work_items/357"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-103415","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-103415","identifiers":["CVE-2026-103415"]},"retained":false,"historicalAffected":[]}],"coverage":[]}