CVE-2026-116540
netty-tcnative 2.0.66.Final before 2.0.84.Final Use-After-Free in Session Ticket Callback
CVSS Score
5.9
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-416 |
| Vendor | netty |
| Product | netty-tcnative |
| Published | Oct 26, 2026 |
| Last Updated | Oct 26, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
netty / netty-tcnative
2.0.66.Final < 2.0.84.Final
References
github.com: https://github.com/netty/netty-tcnative/security/advisories/GHSA-mmc8-vg2v-fvvw github.com: https://github.com/netty/netty-tcnative/commit/59662a8b07a9a7623ae1bc472f5751f31c81a118 github.com: https://github.com/netty/netty-tcnative/blob/netty-tcnative-parent-2.0.83.Final/openssl-dynamic/src/main/c/sslcontext.c#L1365 github.com: https://github.com/netty/netty-tcnative/releases/tag/netty-tcnative-parent-2.0.84.Final github.com: https://github.com/netty/netty-tcnative vulncheck.com: https://www.vulncheck.com/advisories/netty-tcnative-2.0.66-final-before-2.0.84-final-use-after-free-in-session-ticket-callback
Credits
Yu Bao, PayPal Cyber Security Team