CVE-2025-55163
HIGH7.5EPSS 0.05%netty - security update
Published: 8/13/2025Modified: 4/28/2026
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.
Affected packages (4)
- Debian/nettyfrom 0, < 1:4.1.48-4+deb11u3
- Debian/nettyfrom 0, < 1:4.1.48-7+deb12u2
- Maven/io.grpc:grpc-netty-shadedfrom 0, < 1.75.0
- Maven/io.netty:netty-codec-http2>= 4.2.0.Alpha1, < 4.2.4.Final
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
References (8)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2025-55163
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2025-55163
- PATCHhttps://github.com/netty/netty
- WEBhttps://github.com/grpc/grpc-java/commit/6462ef9a11980e168c21d90bbc7245c728fd1a7a
- WEBhttps://github.com/netty/netty/commit/be53dc3c9acd9af2e20d0c3c07cd77115a594cf1
- WEBhttps://github.com/netty/netty/security/advisories/GHSA-prj3-ccx8-p6x4
- WEBhttps://www.kb.cert.org/vuls/id/767506
- WEBhttp://www.openwall.com/lists/oss-security/2025/08/16/1