CVE catalog

CVE-2025-55163

Netty vulnerabilities

Severity: High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: Aug 13, 2025, 2:17:36 PM UTC
Source: [NVD] · [CVE record]
EPSS: 1.10% · Oct 25, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	netty	sid	`1:4.1.48-16`	fixed
Debian	netty	forky	`1:4.1.48-16`	fixed
Debian	netty	trixie	`1:4.1.48-10+deb13u1`	fixed
Debian	netty	trixie-security	`1:4.1.48-10+deb13u1`	fixed
Debian	netty	bookworm	`1:4.1.48-7+deb12u2`	fixed
Debian	netty	bookworm-security	`1:4.1.48-7+deb12u2`	fixed
Ubuntu	netty	noble	Not reported	vulnerable
Ubuntu	netty	noble	`1:4.1.48-9ubuntu0.2`	fixed
Ubuntu	libnetty-java	noble	`1:4.1.48-9ubuntu0.2`	fixed
Ubuntu	netty	pro	`1:4.1.33-1`	vulnerable
Ubuntu	netty	pro	`1:4.1.33-2`	vulnerable
Ubuntu	netty	pro	`1:4.1.33-3`	vulnerable
Ubuntu	netty	pro	`1:4.1.45-1`	vulnerable
Ubuntu	netty	pro	`1:4.1.45-1ubuntu0.1~esm1`	vulnerable
Ubuntu	netty	pro	`1:4.1.45-1ubuntu0.1~esm2`	vulnerable
Ubuntu	netty	pro	`1:4.1.45-1ubuntu0.1~esm3`	vulnerable
Ubuntu	netty	pro	`1:4.1.45-1ubuntu0.1~esm4`	vulnerable
Ubuntu	netty	pro	`1:4.1.45-1ubuntu0.1~esm6`	vulnerable
Ubuntu	netty	pro	`1:4.1.45-1ubuntu0.1~esm7`	fixed
Ubuntu	netty	22.04	`1:4.1.48-4`	vulnerable
Ubuntu	netty	22.04	`1:4.1.48-4+deb11u1build0.22.04.1`	vulnerable
Ubuntu	netty	22.04	`1:4.1.48-4+deb11u2build0.22.04.1`	vulnerable
Ubuntu	netty	22.04	`1:4.1.48-4+deb11u2ubuntu0.1`	vulnerable
Ubuntu	netty	22.04	`1:4.1.48-4+deb11u2ubuntu0.2`	fixed
Ubuntu	netty	24.04	`1:4.1.48-7`	vulnerable
Ubuntu	netty	24.04	`1:4.1.48-8`	vulnerable
Ubuntu	netty	24.04	`1:4.1.48-9`	vulnerable
Ubuntu	netty	24.04	`1:4.1.48-9ubuntu0.1`	vulnerable
Ubuntu	netty	24.04	`1:4.1.48-9ubuntu0.2`	fixed
Opensuse	netty	tumbleweed	`4.1.124-1.1`	fixed
Suse	netty	manager server lts 4.3	`4.1.44.Final-150400.3.9.1`	fixed
Suse	netty-tcnative	linux enterprise module for development tools 15 sp6	`2.0.73-150200.3.30.1`	fixed
Suse	netty-tcnative	linux enterprise module for development tools 15 sp7	`2.0.73-150200.3.30.1`	fixed
Suse	netty	linux enterprise module for package hub 15 sp6	`4.1.126-150200.4.34.1`	fixed
Suse	netty	linux enterprise module for package hub 15 sp7	`4.1.126-150200.4.34.1`	fixed
Suse	netty-tcnative	linux enterprise high performance computing 15 sp3-ltss	`2.0.73-150200.3.30.1`	fixed
Suse	netty-tcnative	linux enterprise high performance computing 15 sp4-espos	`2.0.73-150200.3.30.1`	fixed
Suse	netty-tcnative	linux enterprise high performance computing 15 sp4-ltss	`2.0.73-150200.3.30.1`	fixed
Suse	netty-tcnative	linux enterprise high performance computing 15 sp5-espos	`2.0.73-150200.3.30.1`	fixed
Suse	netty-tcnative	linux enterprise high performance computing 15 sp5-ltss	`2.0.73-150200.3.30.1`	fixed
Suse	netty-tcnative	linux enterprise server 15 sp3-ltss	`2.0.73-150200.3.30.1`	fixed
Suse	netty-tcnative	linux enterprise server 15 sp4-ltss	`2.0.73-150200.3.30.1`	fixed
Suse	netty-tcnative	linux enterprise server 15 sp5-ltss	`2.0.73-150200.3.30.1`	fixed
Suse	netty-tcnative	linux enterprise server for sap applications 15 sp3	`2.0.73-150200.3.30.1`	fixed
Suse	netty-tcnative	linux enterprise server for sap applications 15 sp4	`2.0.73-150200.3.30.1`	fixed
Suse	netty-tcnative	linux enterprise server for sap applications 15 sp5	`2.0.73-150200.3.30.1`	fixed
Suse	netty-tcnative	enterprise storage 7.1	`2.0.73-150200.3.30.1`	fixed
Opensuse	netty	leap 15.6	`4.1.126-150200.4.34.1`	fixed
Opensuse	netty-tcnative	leap 15.6	`2.0.73-150200.3.30.1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	netty	source	sid	`1:4.1.48-11`	not yet assigned	Not reported	[1111105]
Debian	netty	source	forky	`1:4.1.48-11`	not yet assigned	Not reported	[1111105]
Debian	netty	source	trixie	`1:4.1.48-10+deb13u1`	not yet assigned	Not reported	[1111105]
Debian	netty	source	bookworm	`1:4.1.48-7+deb12u2`	not yet assigned	Not reported	[1111105]
Ubuntu	netty	deb	noble	`1:4.1.48-9ubuntu0.2`	Not reported	Not reported	Not reported
Ubuntu	libnetty-java	deb	noble	`1:4.1.48-9ubuntu0.2`	Not reported	Not reported	Not reported
Ubuntu	netty	deb	pro	`1:4.1.45-1ubuntu0.1~esm7`	Not reported	USN-8654-1	Not reported
Ubuntu	netty	deb	22.04	`1:4.1.48-4+deb11u2ubuntu0.2`	Not reported	USN-8654-1	Not reported
Ubuntu	netty	deb	24.04	`1:4.1.48-9ubuntu0.2`	Not reported	USN-8654-1	Not reported
Opensuse	netty	rpm	tumbleweed	`4.1.124-1.1`	Not reported	OPENSUSE-SU-2025:15483-1	Not reported
Suse	netty	rpm	manager server lts 4.3	`4.1.44.Final-150400.3.9.1`	Not reported	SUSE-SU-2025:03021-1	Not reported
Suse	netty-tcnative	rpm	linux enterprise module for development tools 15 sp6	`2.0.73-150200.3.30.1`	Not reported	SUSE-SU-2025:03114-1	Not reported
Suse	netty-tcnative	rpm	linux enterprise module for development tools 15 sp7	`2.0.73-150200.3.30.1`	Not reported	SUSE-SU-2025:03114-1	Not reported
Suse	netty	rpm	linux enterprise module for package hub 15 sp6	`4.1.126-150200.4.34.1`	Not reported	SUSE-SU-2025:03114-1	Not reported
Suse	netty	rpm	linux enterprise module for package hub 15 sp7	`4.1.126-150200.4.34.1`	Not reported	SUSE-SU-2025:03114-1	Not reported
Suse	netty-tcnative	rpm	linux enterprise high performance computing 15 sp3-ltss	`2.0.73-150200.3.30.1`	Not reported	SUSE-SU-2025:03114-1	Not reported
Suse	netty-tcnative	rpm	linux enterprise high performance computing 15 sp4-espos	`2.0.73-150200.3.30.1`	Not reported	SUSE-SU-2025:03114-1	Not reported
Suse	netty-tcnative	rpm	linux enterprise high performance computing 15 sp4-ltss	`2.0.73-150200.3.30.1`	Not reported	SUSE-SU-2025:03114-1	Not reported
Suse	netty-tcnative	rpm	linux enterprise high performance computing 15 sp5-espos	`2.0.73-150200.3.30.1`	Not reported	SUSE-SU-2025:03114-1	Not reported
Suse	netty-tcnative	rpm	linux enterprise high performance computing 15 sp5-ltss	`2.0.73-150200.3.30.1`	Not reported	SUSE-SU-2025:03114-1	Not reported
Suse	netty-tcnative	rpm	linux enterprise server 15 sp3-ltss	`2.0.73-150200.3.30.1`	Not reported	SUSE-SU-2025:03114-1	Not reported
Suse	netty-tcnative	rpm	linux enterprise server 15 sp4-ltss	`2.0.73-150200.3.30.1`	Not reported	SUSE-SU-2025:03114-1	Not reported
Suse	netty-tcnative	rpm	linux enterprise server 15 sp5-ltss	`2.0.73-150200.3.30.1`	Not reported	SUSE-SU-2025:03114-1	Not reported
Suse	netty-tcnative	rpm	linux enterprise server for sap applications 15 sp3	`2.0.73-150200.3.30.1`	Not reported	SUSE-SU-2025:03114-1	Not reported
Suse	netty-tcnative	rpm	linux enterprise server for sap applications 15 sp4	`2.0.73-150200.3.30.1`	Not reported	SUSE-SU-2025:03114-1	Not reported
Suse	netty-tcnative	rpm	linux enterprise server for sap applications 15 sp5	`2.0.73-150200.3.30.1`	Not reported	SUSE-SU-2025:03114-1	Not reported
Suse	netty-tcnative	rpm	enterprise storage 7.1	`2.0.73-150200.3.30.1`	Not reported	SUSE-SU-2025:03114-1	Not reported
Opensuse	netty	rpm	leap 15.6	`4.1.126-150200.4.34.1`	Not reported	SUSE-SU-2025:03114-1	Not reported
Opensuse	netty-tcnative	rpm	leap 15.6	`2.0.73-150200.3.30.1`	Not reported	SUSE-SU-2025:03114-1	Not reported

[Debian bug #1111105]

OpenFactory catalog packages

[openSUSE Tumbleweed]

[netty-bom]Unknown
Source package: [netty]
Details (1)
- 4.1.136-1.1 · noarch · tumbleweed
  Unknown · Fixed: 4.1.124-1.1
  Version impact unknown
  usn · netty · opensuse · tumbleweed
[netty-javadoc]Unknown
Source package: [netty]
Details (1)
- 4.1.136-1.1 · noarch · tumbleweed
  Unknown · Fixed: 4.1.124-1.1
  Version impact unknown
  usn · netty · opensuse · tumbleweed
[netty-parent]Unknown
Source package: [netty]
Details (1)
- 4.1.136-1.1 · noarch · tumbleweed
  Unknown · Fixed: 4.1.124-1.1
  Version impact unknown
  usn · netty · opensuse · tumbleweed
[netty]Fixed
Source package: [netty]
Details (1)
- 4.1.136-1.1 · x86_64 · tumbleweed
  Fixed · Fixed: 4.1.124-1.1
  usn · netty · opensuse · tumbleweed

[Debian 12 (Bookworm)]

[libnetty-java]Fixed
Source package: [netty]
Details (4)
- 1:4.1.48-7+deb12u2 · all · bookworm
  Fixed · Fixed: 1:4.1.48-7+deb12u2
  usn · netty · debian · bookworm; usn · netty · debian · 12
- 1:4.1.48-7+deb12u2 · all · bookworm
  Fixed · Fixed: 1:4.1.48-7+deb12u2
  usn · netty · debian · bookworm; usn · netty · debian · 12
- 1:4.1.48-7+deb12u2 · all · bookworm-security
  Fixed · Fixed: 1:4.1.48-7+deb12u2
  usn · netty · debian · bookworm; usn · netty · debian · 12
- 1:4.1.48-7+deb12u2 · all · bookworm-security
  Fixed · Fixed: 1:4.1.48-7+deb12u2
  usn · netty · debian · bookworm; usn · netty · debian · 12

[Debian 13 (Trixie)]

[libnetty-java]Fixed
Source package: [netty]
Details (4)
- 1:4.1.48-10+deb13u1 · all · trixie
  Fixed · Fixed: 1:4.1.48-10+deb13u1
  usn · netty · debian · 13
- 1:4.1.48-10+deb13u1 · all · trixie
  Fixed · Fixed: 1:4.1.48-10+deb13u1
  usn · netty · debian · 13
- 1:4.1.48-10+deb13u1 · all · trixie-security
  Fixed · Fixed: 1:4.1.48-10+deb13u1
  usn · netty · debian · 13
- 1:4.1.48-10+deb13u1 · all · trixie-security
  Fixed · Fixed: 1:4.1.48-10+deb13u1
  usn · netty · debian · 13

Observed: Oct 27, 2026, 12:31:15 PM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]