{"id":"CVE-2026-116539","aliases":[],"cve":{"records":[{"id":"CVE-2026-116539","source":"VulnCheck","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-10-26T14:30:57.254Z","published":"2026-10-26T14:59:39.460Z","modified":"2026-10-26T14:59:39.460Z"}],"publishers":[{"name":"VulnCheck","role":"CNA","organizationId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","modified":"2026-10-26T14:59:39.460Z"}],"references":[{"url":"https://github.com/netty/netty-tcnative/security/advisories/GHSA-gf9q-9mg7-g5qh","tags":["vendor-advisory"],"source":"VulnCheck"},{"url":"https://github.com/netty/netty-tcnative/commit/92dd66fd1243d85c05a61288f96367a70260b6b8","tags":["patch"],"source":"VulnCheck"},{"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":"VulnCheck"},{"url":"https://github.com/netty/netty-tcnative/releases/tag/netty-tcnative-parent-2.0.84.Final","tags":["release-notes"],"source":"VulnCheck"},{"url":"https://github.com/netty/netty-tcnative","tags":["product"],"source":"VulnCheck"},{"url":"https://www.vulncheck.com/advisories/netty-netty-tcnative-before-2.0.84-final-heap-buffer-overflow-via-openssl-bio","tags":["third-party-advisory"],"source":"VulnCheck"}],"weaknesses":[{"id":"CWE-787","description":"Out-of-bounds Write","source":"VulnCheck"}],"applicability":[],"prioritization":[]},"title":"Netty netty-tcnative before 2.0.84.Final Heap Buffer Overflow via OpenSSL BIO","titleSource":"VulnCheck","descriptionSource":"VulnCheck","description":"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process.","score":8.2,"severity":"high","published":"2026-10-26T14:59:39.460Z","modified":"2026-10-26T14:59:39.460Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"netty","name":"netty-tcnative","platforms":[],"versions":[{"version":"0","status":"affected","lessThan":"2.0.84.Final","versionType":"custom"}],"defaultStatus":"unaffected","packageURL":"pkg:maven/io.netty/netty-tcnative","packageIdentity":{"ecosystem":"Maven","name":"io.netty:netty-tcnative"},"cpes":[],"source":"VulnCheck","url":"https://www.cve.org/CVERecord?id=CVE-2026-116539"},{"vendor":"netty","name":"netty-tcnative-boringssl-static","platforms":[],"versions":[{"version":"0","status":"affected","lessThan":"2.0.84.Final","versionType":"custom"}],"defaultStatus":"unaffected","packageURL":"pkg:maven/io.netty/netty-tcnative-boringssl-static","packageIdentity":{"ecosystem":"Maven","name":"io.netty:netty-tcnative-boringssl-static"},"cpes":[],"source":"VulnCheck","url":"https://www.cve.org/CVERecord?id=CVE-2026-116539"}],"remediation":[],"references":["https://github.com/netty/netty-tcnative/security/advisories/GHSA-gf9q-9mg7-g5qh","https://github.com/netty/netty-tcnative/commit/92dd66fd1243d85c05a61288f96367a70260b6b8","https://github.com/netty/netty-tcnative/blob/netty-tcnative-parent-2.0.83.Final/openssl-dynamic/src/main/c/ssl.c#L199","https://github.com/netty/netty-tcnative/releases/tag/netty-tcnative-parent-2.0.84.Final","https://github.com/netty/netty-tcnative","https://www.vulncheck.com/advisories/netty-netty-tcnative-before-2.0.84-final-heap-buffer-overflow-via-openssl-bio"],"sources":[{"name":"CVE","id":"CVE-2026-116539","modified":"2026-10-26T14:59:39.460Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-116539"}],"assessments":[{"source":"VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":8.2},{"source":"VulnCheck","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","score":5.9}],"sourceAffected":[],"observedAt":"2026-10-29T14:35:11.380Z","kev":{"status":"not-listed","checkedAt":"2026-10-31T16:40:31.722Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[],"aiSummary":{"text":"Netty netty-tcnative before 2.0.84.Final has a heap buffer overflow vulnerability via OpenSSL BIO, allowing remote TLS peers to crash the JVM process. The vulnerability is caused by an out-of-bounds memcpy. Affected versions are less than 2.0.84.Final.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-10-30T08:43:53.574Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-116539"}]}}