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.

Project Subscriptions

Vendors Products
Netty-tcnative Subscribe
Netty-tcnative-boringssl-static Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Mon, 26 Oct 2026 19:15:00 +0000

Type Values Removed Values Added
First Time appeared Netty
Netty netty-tcnative
Netty netty-tcnative-boringssl-static
Vendors & Products Netty
Netty netty-tcnative
Netty netty-tcnative-boringssl-static

Mon, 26 Oct 2026 15:30:00 +0000

Type Values Removed Values Added
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.
Title Netty netty-tcnative before 2.0.84.Final Heap Buffer Overflow via OpenSSL BIO
Weaknesses CWE-787
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 8.2, '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'}


Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-26T14:59:39.460Z

Reserved: 2026-10-26T14:30:57.254Z

Link: CVE-2026-116539

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-26T16:17:19.200

Modified: 2026-10-26T16:54:08.707

Link: CVE-2026-116539

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-26T18:49:55Z

Weaknesses