CVE-2026-42577

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Source
https://cve.org/CVERecord?id=CVE-2026-42577
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-42577.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-42577
Aliases
Downstream
Related
Published
2026-05-13T18:00:28.744Z
Modified
2026-06-15T12:23:25.747454953Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
Netty: epoll transport denial of service via RST on half-closed TCP connection
Details

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.

Database specific 
{
    "cwe_ids": [
        "CWE-772"
    ],
    "cna_assigner": "GitHub_M",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42577.json"
}
References

Affected packages

Git / github.com/netty/netty

Affected ranges

Type
GIT
Repo
https://github.com/netty/netty
Events
Introduced
09e64d259c99be8b5b2a471a78f11e65eb82598a
Fixed
b3844c8108b42f68d56144b36d4d1ed96078a688
Fixed
0ec3d97fab376e243d328ac95fbd288ba0f6e22d
Database specific 
{
    "cpe": "cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:*",
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "4.2.0"
        },
        {
            "fixed": "4.2.13"
        }
    ]
}

Affected versions

netty-4.*
netty-4.2.0.Final
netty-4.2.1.Final
netty-4.2.10.Final
netty-4.2.11.Final
netty-4.2.12.Final
netty-4.2.2.Final
netty-4.2.3.Final
netty-4.2.4.Final
netty-4.2.5.Final
netty-4.2.6.Final
netty-4.2.7.Final
netty-4.2.8.Final
netty-4.2.9.Final

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-42577.json"