CVE-2026-42577: io.netty:netty-transport-classes-epoll:jar:4.2.12.Final:compile

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Summary

Netty is an asynchronous, event-driven network application framework. From 4.2.0.Final to 4.2.13.Final , Netty's epoll transport fails to detect and close TCP connections that receive a RST after being half-closed, leading to stale channels that are never cleaned up and, in some code paths, a 100% CPU busy-loop in the event loop thread. This vulnerability is fixed in 4.2.13.Final.

Sonatype's research suggests that this CVE's details differ from those defined at NVD. See https://guide.sonatype.com/vulnerability/CVE-2026-42577 for details

CVE: CVE-2026-42577
CWE: CWE-772

References

• https://guide.sonatype.com/vulnerability/CVE-2026-42577?component-type=maven&component-name=io.netty%2Fnetty-transport-classes-epoll&utm_source=ossindex-client&utm_medium=integration&utm_content=1.8.1
• http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2026-42577
• GHSA-rwm7-x88c-3g2p