Vulnerability details
CVE-2026-42577
netty netty
Netty: epoll transport denial of service via RST on half-closed TCP connection
CVSS 3.1
7.5High
Official description
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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.5High | 3.1 | CVEProject cvelistV5 (CNA) (GitHub_M) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| netty | netty | >= 4.2.0.Final, < 4.2.13.Final | CVEProject cvelistV5 (CNA) |
References and advisories
3- https://github.com/netty/netty/security/advisories/GHSA-rwm7-x88c-3g2p x_refsource_CONFIRM
- https://github.com/netty/netty/pull/16689 x_refsource_MISC
- https://github.com/netty/netty/commit/0ec3d97fab376e243d328ac95fbd288ba0f6e22d x_refsource_MISC
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Details
- Published
- 2026-05-13
- Last updated
- 2026-05-14
- State
- Published
- Assigner (CNA)
- GitHub_M
Exploit prediction (EPSS)
0.4%
Probability of exploitation in 30 days
35.3%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- None
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-772Missing Release of Resource after Effective Lifetime