Upstream information

CVE-2026-42304 at MITRE

Description

Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 26.4.0rc2, the twisted.names module is vulnerable to a Denial of Service (DoS) attack via resource exhaustion during DNS name decompression. A remote, unauthenticated attacker can exploit this by sending a crafted TCP DNS packet containing deeply chained compression pointers. This flaw bypasses previous loop-prevention logic, causing the single-threaded Twisted reactor to hang while processing millions of recursive lookups, effectively freezing the server. This vulnerability is fixed in 26.4.0rc2.

SUSE information

Overall state of this security issue: Pending

This issue is currently rated as having important severity.

CVSS v3 Scores
CVSS detail CNA (GitHub) SUSE
Base Score 7.5 7.5
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network Network
Attack Complexity Low Low
Privileges Required None None
User Interaction None None
Scope Unchanged Unchanged
Confidentiality Impact None None
Integrity Impact None None
Availability Impact High High
CVSSv3 Version 3.1 3.1
SUSE Bugzilla entry: 1265265 [NEW]

No SUSE Security Announcements cross referenced.

List of released packages

Product(s) Fixed package version(s) References
openSUSE Tumbleweed
  • python-Twisted-doc >= 26.4.0-1.1
  • python311-Twisted >= 26.4.0-1.1
  • python311-Twisted-all_non_platform >= 26.4.0-1.1
  • python311-Twisted-conch >= 26.4.0-1.1
  • python311-Twisted-conch_nacl >= 26.4.0-1.1
  • python311-Twisted-contextvars >= 26.4.0-1.1
  • python311-Twisted-http2 >= 26.4.0-1.1
  • python311-Twisted-serial >= 26.4.0-1.1
  • python311-Twisted-tls >= 26.4.0-1.1
  • python313-Twisted >= 26.4.0-1.1
  • python313-Twisted-all_non_platform >= 26.4.0-1.1
  • python313-Twisted-conch >= 26.4.0-1.1
  • python313-Twisted-conch_nacl >= 26.4.0-1.1
  • python313-Twisted-contextvars >= 26.4.0-1.1
  • python313-Twisted-http2 >= 26.4.0-1.1
  • python313-Twisted-serial >= 26.4.0-1.1
  • python313-Twisted-tls >= 26.4.0-1.1
  • python314-Twisted >= 26.4.0-1.1
  • python314-Twisted-all_non_platform >= 26.4.0-1.1
  • python314-Twisted-conch >= 26.4.0-1.1
  • python314-Twisted-conch_nacl >= 26.4.0-1.1
  • python314-Twisted-contextvars >= 26.4.0-1.1
  • python314-Twisted-http2 >= 26.4.0-1.1
  • python314-Twisted-serial >= 26.4.0-1.1
  • python314-Twisted-tls >= 26.4.0-1.1
 Patchnames:
openSUSE-Tumbleweed-2026-10759

Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.

Product(s) Source package State
Products under general support and receiving all security fixes.
SUSE Linux Enterprise Desktop 15 SP7 python-Twisted Affected
SUSE Linux Enterprise High Performance Computing 15 SP7 python-Twisted Affected
SUSE Linux Enterprise High Performance Computing 15 SP7 python3-Twisted Affected
SUSE Linux Enterprise Module for Python 3 15 SP7 python-Twisted Affected
SUSE Linux Enterprise Module for Server Applications 15 SP7 python3-Twisted Affected
SUSE Linux Enterprise Server 15 SP7 python-Twisted Affected
SUSE Linux Enterprise Server 15 SP7 python3-Twisted Affected
SUSE Linux Enterprise Server 16.1 python-Twisted Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP7 python-Twisted Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP7 python3-Twisted Affected
SUSE Linux Enterprise Server for SAP applications 16.1 python-Twisted Affected
Products under Long Term Service Pack support and receiving important and critical security fixes.
SUSE Linux Enterprise High Performance Computing 15 SP4 python-Twisted Affected
SUSE Linux Enterprise High Performance Computing 15 SP4 python3-Twisted Affected
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS python-Twisted Affected
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS python3-Twisted Affected
SUSE Linux Enterprise High Performance Computing 15 SP5 python-Twisted Affected
SUSE Linux Enterprise High Performance Computing 15 SP5 python3-Twisted Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS python-Twisted Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS python3-Twisted Affected
SUSE Linux Enterprise Module for Public Cloud 15 SP4 python-Twisted Affected
SUSE Linux Enterprise Module for Python 3 15 SP4 python-Twisted Affected
SUSE Linux Enterprise Module for Python 3 15 SP5 python-Twisted Affected
SUSE Linux Enterprise Module for Python 3 15 SP6 python-Twisted Affected
SUSE Linux Enterprise Module for Server Applications 15 SP4 python3-Twisted Affected
SUSE Linux Enterprise Module for Server Applications 15 SP5 python3-Twisted Affected
SUSE Linux Enterprise Module for Server Applications 15 SP6 python3-Twisted Affected
SUSE Linux Enterprise Server 15 SP4 python-Twisted Affected
SUSE Linux Enterprise Server 15 SP4 python3-Twisted Affected
SUSE Linux Enterprise Server 15 SP4-LTSS python-Twisted Affected
SUSE Linux Enterprise Server 15 SP4-LTSS python3-Twisted Affected
SUSE Linux Enterprise Server 15 SP5 python-Twisted Affected
SUSE Linux Enterprise Server 15 SP5 python3-Twisted Affected
SUSE Linux Enterprise Server 15 SP5-LTSS python-Twisted Affected
SUSE Linux Enterprise Server 15 SP5-LTSS python3-Twisted Affected
SUSE Linux Enterprise Server 15 SP6 python-Twisted Affected
SUSE Linux Enterprise Server 15 SP6 python3-Twisted Affected
SUSE Linux Enterprise Server 15 SP6-LTSS python-Twisted Affected
SUSE Linux Enterprise Server 15 SP6-LTSS python3-Twisted Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP6 python-Twisted Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP6 python3-Twisted Affected
SUSE Manager Proxy 4.3 python-Twisted Affected
SUSE Manager Proxy 4.3 python3-Twisted Affected
SUSE Manager Proxy LTS 4.3 python3-Twisted Affected
SUSE Manager Retail Branch Server 4.3 python-Twisted Affected
SUSE Manager Retail Branch Server 4.3 python3-Twisted Affected
SUSE Manager Retail Branch Server LTS 4.3 python3-Twisted Affected
SUSE Manager Server 4.3 python-Twisted Affected
SUSE Manager Server 4.3 python3-Twisted Affected
SUSE Manager Server LTS 4.3 python3-Twisted Affected
Products past their end of life and not receiving proactive updates anymore.
SUSE CaaS Platform 4.0 python-Twisted Affected
SUSE Enterprise Storage 6 python-Twisted Affected
SUSE Enterprise Storage 7 python-Twisted Affected
SUSE Enterprise Storage 7.1 python-Twisted Affected
SUSE Linux Enterprise Desktop 15 SP4 python-Twisted Affected
SUSE Linux Enterprise Desktop 15 SP5 python-Twisted Affected
SUSE Linux Enterprise Desktop 15 SP6 python-Twisted Affected
SUSE Linux Enterprise High Performance Computing 15 SP1 python-Twisted Affected
SUSE Linux Enterprise High Performance Computing 15 SP2 python-Twisted Affected
SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS python-Twisted Affected
SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS python-Twisted Affected
SUSE Linux Enterprise High Performance Computing 15 SP3 python-Twisted Affected
SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS python-Twisted Affected
SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS python-Twisted Affected
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS python-Twisted Affected
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS python3-Twisted Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS python-Twisted Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS python3-Twisted Affected
SUSE Linux Enterprise High Performance Computing 15 SP6 python-Twisted Affected
SUSE Linux Enterprise High Performance Computing 15 SP6 python3-Twisted Affected
SUSE Linux Enterprise Module for Package Hub 15 SP3 python-Twisted Affected
SUSE Linux Enterprise Module for Public Cloud 15 SP1 python-Twisted Affected
SUSE Linux Enterprise Module for Server Applications 15 SP2 python-Twisted Affected
SUSE Linux Enterprise Module for Server Applications 15 SP3 python-Twisted Affected
SUSE Linux Enterprise Real Time 15 SP2 python-Twisted Affected
SUSE Linux Enterprise Real Time 15 SP3 python-Twisted Affected
SUSE Linux Enterprise Real Time 15 SP4 python3-Twisted Affected
SUSE Linux Enterprise Server 15 SP1 python-Twisted Affected
SUSE Linux Enterprise Server 15 SP1-LTSS python-Twisted Affected
SUSE Linux Enterprise Server 15 SP2 python-Twisted Affected
SUSE Linux Enterprise Server 15 SP2-BCL python-Twisted Affected
SUSE Linux Enterprise Server 15 SP2-LTSS python-Twisted Affected
SUSE Linux Enterprise Server 15 SP3 python-Twisted Affected
SUSE Linux Enterprise Server 15 SP3-BCL python-Twisted Affected
SUSE Linux Enterprise Server 15 SP3-LTSS python-Twisted Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP1 python-Twisted Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP2 python-Twisted Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP3 python-Twisted Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP4 python-Twisted Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP4 python3-Twisted Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP5 python-Twisted Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP5 python3-Twisted Affected
SUSE Manager Proxy 4.0 python-Twisted Affected
SUSE Manager Proxy 4.1 python-Twisted Affected
SUSE Manager Proxy 4.2 python-Twisted Affected
SUSE Manager Retail Branch Server 4.0 python-Twisted Affected
SUSE Manager Retail Branch Server 4.1 python-Twisted Affected
SUSE Manager Retail Branch Server 4.2 python-Twisted Affected
SUSE Manager Server 4.0 python-Twisted Affected
SUSE Manager Server 4.1 python-Twisted Affected
SUSE Manager Server 4.2 python-Twisted Affected
openSUSE Leap 15.3 python-Twisted Affected
openSUSE Leap 15.4 python-Twisted Affected
openSUSE Leap 15.4 python3-Twisted Affected
openSUSE Leap 15.5 python-Twisted Affected
openSUSE Leap 15.5 python3-Twisted Affected
openSUSE Leap 15.6 python-Twisted Affected

SUSE Timeline for this CVE

CVE page created: Wed May 13 11:59:56 2026
CVE page last modified: Thu May 14 13:34:34 2026