Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%

Buy Us a Coffee

CVE-2026-116540— netty-tcnative 2.0.66.Final before 2.0.84.Final Use-After-Free in Session Ticket Callback

Quick assessment

Affected

netty netty-tcnative

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在针对 OpenSSL 3.x 构建的 netty-tcnative 2.0.66.Final 至 2.0.84.Final 之前的版本中，ssl_tlsext_ticket_key_cb 函数在会话票据密钥轮换期间存在释放后使用（use-after-free）漏洞。当 setSessionTicketKeys0 释放共享密钥数组时，若远程客户端正在进行 TLS 握手，将导致 OpenSSL 读取已被释放的 HMAC 密钥，从而引发崩溃或破坏票据处理过程。

CVSS 5.9 · Medium Updated Oct 27, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Get alerts for future matching vulnerabilities Log in to subscribe

Vulnerability Information

Have questions about the vulnerability? See if Shenlong's analysis helps!

View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title

netty-tcnative 2.0.66.Final before 2.0.84.Final Use-After-Free in Session Ticket Callback

Source: CVE Program / CVE List V5

Vulnerability Description

netty-tcnative 2.0.66.Final before 2.0.84.Final built against OpenSSL 3.x contains a use-after-free vulnerability in ssl_tlsext_ticket_key_cb during session ticket key rotation. Remote clients performing TLS handshakes while setSessionTicketKeys0 frees the shared key array cause OpenSSL to read freed HMAC keys, crashing or corrupting ticket processing.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Source: CVE Program / CVE List V5

Vulnerability Type

释放后使用

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
netty	netty-tcnative	2.0.66.Final ~ 2.0.84.Final	-

II. Public POCs for CVE-2026-116540

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-116540

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-116540 (1)

🔗 Fix use after free bug that could cause crash when session keys are r… · netty/netty-tcnative@59662a8 · GitHub patch

Vendor Advisories for CVE-2026-116540 (2)

Vendor Pages for CVE-2026-116540 (2)

https://www.cve.org/CVERecord?id=CVE-2026-116540

Same Patch Batch · netty · 2026-10-26 · 4 CVEs total

CVE-2026-116541	5.9 MEDIUM	netty-tcnative before 2.0.84.Final Denial of Service via BIO Write Overcount
CVE-2026-116539	5.9 MEDIUM	Netty netty-tcnative before 2.0.84.Final Heap Buffer Overflow via OpenSSL BIO
CVE-2026-116542	5.3 MEDIUM	Netty netty-tcnative before 2.0.84.Final SNI Hostname Spoofing via Modified UTF-8 Decoding

IV. Related Vulnerabilities

Same product: netty-tcnative

Same vendor: netty

Same weakness: CWE-416