CVE-2026-116541

HIGH
MEDIUM Priority: 0.04 BB Relevance: 76/100
Published: 2026-10-26 Modified: 2026-10-26 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
AT: Present
VC: None
VI: None
VA: High

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.

Weakness Classification (1)

Bug Bounty Relevance

76 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

8.2 / 10.0 v4.0
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

EPSS — Exploitation Probability

0.49%
Raw Score 0.004930
Percentile 42.3%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00493
2026-10-28
0.00493

Intelligence Sources

mitre ref →
nvd ref →