Out-of-bounds Write Affecting io.netty:netty-tcnative package, versions [,2.0.84.Final)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JAVA-IONETTY-21755445
- published27 Oct 2026
- disclosed26 Oct 2026
- creditUnknown
Introduced: 26 Oct 2026
NewCVE-2026-116539 (opens in a new tab)How to fix?
Upgrade io.netty:netty-tcnative to version 2.0.84.Final or higher.
Overview
Affected versions of this package are vulnerable to Out-of-bounds Write via the tcn_write_to_bytebuffer BIO callback process. An attacker can cause the JVM process to crash by sending specially crafted handshake, renegotiation, or post-handshake messages that trigger an out-of-bounds memory copy operation.