cve.bz

CVE-2026-42577

7.5 highEPSS 0.4%

High (7.5) in netty netty. EPSS 0.4% chance of exploitation in the next 30 days. Fixed in io.netty:netty-transport-classes-epoll 4.2.13.Final.

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.

Severity

CVSS 3.1

7.5 high
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
0.4% chance of exploitation in the next 30 days; higher than 35% of CVEs (scores of 2026-10-31)
CWE
CWE-772
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-rwm7-x88c-3g2pMavenio.netty:netty-transport-classes-epoll>=4.2.0.Final <4.2.13.Final4.2.13.Final

References

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