CVE-2025-55163

Netty MadeYouReset HTTP/2 DDoS Vulnerability

Description

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.

Category

8.2
CVSS
Severity: High
CVSS 4.0 •
EPSS 0.04%
Affected: netty netty
Published at:
Updated at:

References

Link Tags
https://github.com/netty/netty/security/advisories/GHSA-prj3-ccx8-p6x4

Frequently Asked Questions

What is the severity of CVE-2025-55163?
CVE-2025-55163 has been scored as a high severity vulnerability.
How to fix CVE-2025-55163?
To fix CVE-2025-55163, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-55163 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-55163 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-55163?
CVE-2025-55163 affects netty netty.
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