Is CVE-2026-116541 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-116541?

CVE-2026-116541 has a CVSS v3 severity of MEDIUM (5.9).

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CVE-2026-116541

Description

Netty netty-tcnative before 2.0.84.Final contains a denial of service vulnerability in the tcn_write_to_bytebuffer BIO write callback that overreports bytes consumed. Remote TLS 1.3 peers can provoke queued post-handshake records like NewSessionTicket or KeyUpdate to truncate flights, fail connections, or abort the JVM process.