CVE-2026-116539: Netty netty-tcnative before 2.0.84.Final Heap Buffer Overflow via OpenSSL BIO
netty · netty-tcnative
Fixed in 2.0.84.Final · Affected: netty-tcnative before 2.0.84.Final · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 34% of scored CVEs
DescriptionCVE.org
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 products2
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- netty · netty-tcnativebefore 2.0.84.Final
- netty · netty-tcnative-boringssl-staticbefore 2.0.84.Final
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- netty
- Published
- October 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-116539 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.