Medium severity5.9NVD Advisory· Published Oct 26, 2026· Updated Oct 26, 2026
CVE-2026-116539
CVE-2026-116539
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.
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Affected products
1- Range: <2.0.84.Final
Patches
Vulnerability mechanics
References
5- github.com/netty/netty-tcnative/blob/netty-tcnative-parent-2.0.83.Final/openssl-dynamic/src/main/c/ssl.cnvd
- github.com/netty/netty-tcnative/commit/92dd66fd1243d85c05a61288f96367a70260b6b8nvd
- github.com/netty/netty-tcnative/releases/tag/netty-tcnative-parent-2.0.84.Finalnvd
- github.com/netty/netty-tcnative/security/advisories/GHSA-gf9q-9mg7-g5qhnvd
- www.vulncheck.com/advisories/netty-netty-tcnative-before-2.0.84-final-heap-buffer-overflow-via-openssl-bionvd
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