CVE-2026-116539
Netty netty-tcnative before 2.0.84.Final Heap Buffer Overflow via OpenSSL BIO
- State
- Published
- Severity
- 8.2 High
- Published
- Oct 26, 2026
- Updated
- Oct 26, 2026
- Reserved
- Oct 26, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.2 High | 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 | VulnCheck |
| 3.1 | 5.9 Medium | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H | VulnCheck |
Weaknesses
- CWE-787 Out-of-bounds Write
Affected Products
| Product | Versions |
|---|---|
netty-tcnativenetty |
|
netty-tcnative-boringssl-staticnetty |
|
References
- GitHub Security Advisory (GHSA-gf9q-9mg7-g5qh)vendor-advisory
- Patch Commitpatch
- https://github.com/netty/netty-tcnative/blob/netty-tcnative-parent-2.0.83.Final/openssl-dynamic/src/main/c/ssl.c#L199technical-description
- netty-tcnative netty-tcnative-parent-2.0.84.Final Release Notesrelease-notes
- https://github.com/netty/netty-tcnativeproduct
- VulnCheck Advisory: Netty netty-tcnative before 2.0.84.Final Heap Buffer Overflow via OpenSSL BIOthird-party-advisory
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