{"schema":"threatline.record/2","record":{"id":"CVE-2026-116539","aliases":["GHSA-gf9q-9mg7-g5qh"],"summary":"Netty netty-tcnative before 2.0.84.Final Heap Buffer Overflow via OpenSSL BIO","details":"Netty netty-tcnative before 2.0.84.Final contains a heap buffer overflow vulnerability in the tcn_write_to_bytebuffer BIO callback caused by failing to wrap the non-application ring buffer write index. Remote TLS peers can drive handshake, renegotiation, or post-handshake messages into this buffer, triggering an out-of-bounds memcpy that crashes the JVM process.","categories":["Frameworks"],"product":"netty-tcnative","vendor":"netty","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-116539","source_modified_at":"2026-10-26T14:59:39.460Z","fetched_at":"2026-10-26T19:10:57.178988Z","product":"netty-tcnative","vendor":"netty","versions":[{"version":"0","lessThan":"2.0.84.Final","status":"affected","versionType":"custom"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-116539","source_modified_at":"2026-10-26T14:59:39.460Z","fetched_at":"2026-10-26T19:10:57.178988Z","product":"netty-tcnative-boringssl-static","vendor":"netty","versions":[{"version":"0","lessThan":"2.0.84.Final","status":"affected","versionType":"custom"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-116539","source_modified_at":"2026-10-26T14:59:39.460Z","fetched_at":"2026-10-26T19:10:57.178988Z","package":{"name":"netty-tcnative","ecosystem":null},"version":"2.0.84.Final","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-116539","source_modified_at":"2026-10-26T14:59:39.460Z","fetched_at":"2026-10-26T19:10:57.178988Z","package":{"name":"netty-tcnative-boringssl-static","ecosystem":null},"version":"2.0.84.Final","basis":"first unaffected version stated in the CVE record"}],"cvss":8.2,"severity":"High","kev":{"listed":false},"epss":{"probability":null,"percentile":null,"score_date":null},"published_at":"2026-10-26T14:59:39.460Z","modified_at":"2026-10-26T14:59:39.460Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-116539","fetched_at":"2026-10-26T19:10:57.178988Z","source_modified_at":"2026-10-26T14:59:39.460Z"}],"sources":["CVE List"],"references":[{"source":"CVE List","url":"https://github.com/netty/netty-tcnative/security/advisories/GHSA-gf9q-9mg7-g5qh","tags":["vendor-advisory"]},{"source":"CVE List","url":"https://github.com/netty/netty-tcnative/commit/92dd66fd1243d85c05a61288f96367a70260b6b8","tags":["patch"]},{"source":"CVE List","url":"https://github.com/netty/netty-tcnative/blob/netty-tcnative-parent-2.0.83.Final/openssl-dynamic/src/main/c/ssl.c#L199","tags":["technical-description"]},{"source":"CVE List","url":"https://github.com/netty/netty-tcnative/releases/tag/netty-tcnative-parent-2.0.84.Final","tags":["release-notes"]},{"source":"CVE List","url":"https://github.com/netty/netty-tcnative","tags":["product"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/netty-netty-tcnative-before-2.0.84-final-heap-buffer-overflow-via-openssl-bio","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-26T14:59:39.460Z","content_hash":"1be7a8212d4755722f0478e5f89545b6d2782c4b700a8237d539148b47f5cf10"}}