CVE-2025-55163

Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.124.Final and 4.2.4.Final, Netty is vulnerable to MadeYouReset DDoS. This is a logical vulnerability in the HTTP/2 protocol, that uses malformed HTTP/2 control frames in order to break the max concurrent streams limit - which results in resource exhaustion and distributed denial of service. This issue has been patched in versions 4.1.124.Final and 4.2.4.Final.

Affected products

Bamboo, Bitbucket, Debian, Netty, Red Os, Suse

Netty

< 4.1.124, 4.2.4

Fix

Available

CVSS 4.0

8.2 HIGH

CVSS 3.1

7.5 HIGH

EPSS

1.0% (61th percentile)

Weakness

CWE-770

NVD status

Modified

Published

2025-08-13

No exploit for CVE-2025-55163 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.