CVE-2026-116539
Medium · 5.9CVSS
5.9
EPSS
0.4%
Published
Oct 26, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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