PT-2025-32999 · Netty+4 · Netty+5

Anatbb + 2 · Published 2025-08-13 · Updated 2026-05-18 · CVE-2025-55163

Positive Technologies (AI Summary)

CVSS v4.0

8.2

High

Base vector

AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions: Netty versions prior to 4.1.124.Final Netty versions prior to 4.2.4.Final

Description: Netty is an asynchronous, event-driven network application framework vulnerable to a MadeYouReset DDoS attack. This issue is a logical vulnerability in the HTTP/2 protocol, triggered by malformed HTTP/2 control frames that bypass the maximum concurrent streams limit, leading to resource exhaustion and a distributed denial of service.

Recommendations: Netty versions prior to 4.1.124.Final: Update to version 4.1.124.Final or later. Netty versions prior to 4.2.4.Final: Update to version 4.2.4.Final or later.

Exploit

Fix

DoS

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

Related Identifiers

BDU:2025-10993

CLEANSTART-2026-DD05788

CLEANSTART-2026-GQ14179

CLEANSTART-2026-JU62349

CLEANSTART-2026-JW30455

CLEANSTART-2026-KU61465

CLEANSTART-2026-LE11246

CLEANSTART-2026-MM00120

CLEANSTART-2026-RN56220

CLEANSTART-2026-SQ91016

CLEANSTART-2026-SV95049

CLEANSTART-2026-VH41554

CLEANSTART-2026-WG59699

CLEANSTART-2026-WK99982

CVE-2025-55163

ECHO-E753-218C-9042

GHSA-PRJ3-CCX8-P6X4

OPENSUSE-SU-2025:15483-1

RHSA-2026:0742

RHSA-2026:0743

RHSA-2026:4915

RHSA-2026:4916

RHSA-2026:4917

SUSE-SU-2025:03021-1

SUSE-SU-2025:03114-1

SUSE-SU-2025_03114-1

Affected Products

Bamboo

Bitbucket

Debian

Netty

Red Os

Suse

References · 372

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/55xxx/CVE-2025-55163.json · Exploit
• https://github.com/netty/netty/security/advisories/GHSA-prj3-ccx8-p6x4 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-68161 · Security Note
• https://osv.dev/vulnerability/CLEANSTART-2026-SQ91016 · Vendor Advisory
• http://repo.red-soft.ru/redos/7.3c/x86_64/updates · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-33870 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2024-12798 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-34453 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-40167 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-24308 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2022-3509 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-41900 · Security Note
• https://osv.dev/vulnerability/CLEANSTART-2026-VH41554 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-55163 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-41973 · Security Note